100 DIFFERENT TYPES OF LOGIN AND SIGNUP FORMS IN JAVA

INTRODUCTION

This comprehensive collection presents 100 unique login and signup forms in Java, each with distinct features, purposes, and implementation approaches. From basic authentication to advanced biometric systems, these forms cover every conceivable authentication scenario.

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SECTION 1: BASIC TEXT-BASED FORMS (1-10)

1. Simple Console Login

import java.util.Scanner;
public class SimpleConsoleLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("Username: ");
String user = sc.nextLine();
System.out.print("Password: ");
String pass = sc.nextLine();
if(user.equals("admin") && pass.equals("123")) 
System.out.println("Welcome!");
else 
System.out.println("Access Denied");
sc.close();
}
}

Feature: Basic credential verification

2. Case-Sensitive Login

public class CaseSensitiveLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("Username: ");
String user = sc.nextLine();
System.out.print("Password: ");
String pass = sc.nextLine();
if(user.equals("Admin") && pass.equals("Pass123")) 
System.out.println("Login Successful");
else 
System.out.println("Invalid Credentials");
}
}

Feature: Differentiates uppercase/lowercase

3. Numeric PIN Login

public class NumericPINLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int correctPIN = 1234;
System.out.print("Enter 4-digit PIN: ");
int enteredPIN = sc.nextInt();
if(enteredPIN == correctPIN) 
System.out.println("Access Granted");
else 
System.out.println("Access Denied");
}
}

Feature: Numeric-only authentication

4. Email-Based Login

public class EmailBasedLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
String validEmail = "[email protected]";
String validPass = "pass123";
System.out.print("Email: ");
String email = sc.nextLine();
System.out.print("Password: ");
String pass = sc.nextLine();
if(email.equals(validEmail) && pass.equals(validPass))
System.out.println("Welcome " + email);
}
}

Feature: Email as username

5. Phone Number Login

public class PhoneNumberLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
String validPhone = "+1234567890";
String validPass = "pass123";
System.out.print("Phone: ");
String phone = sc.nextLine();
System.out.print("Password: ");
String pass = sc.nextLine();
if(phone.equals(validPhone) && pass.equals(validPass))
System.out.println("Login Successful");
}
}

Feature: Phone number authentication

6. Username Length Check

public class UsernameLengthCheck {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("Create Username (min 5 chars): ");
String user = sc.nextLine();
if(user.length() >= 5)
System.out.println("Username accepted");
else
System.out.println("Too short");
}
}

Feature: Username validation

7. Password Length Check

public class PasswordLengthCheck {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("Create Password (min 8 chars): ");
String pass = sc.nextLine();
if(pass.length() >= 8)
System.out.println("Password accepted");
else
System.out.println("Password too short");
}
}

Feature: Password length validation

8. Simple Registration Form

public class SimpleRegistration {
static class User {
String name, email, pass;
}
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
User newUser = new User();
System.out.print("Name: "); newUser.name = sc.nextLine();
System.out.print("Email: "); newUser.email = sc.nextLine();
System.out.print("Password: "); newUser.pass = sc.nextLine();
System.out.println("Registered: " + newUser.name);
}
}

Feature: Basic user registration

9. Dual-Field Login

public class DualFieldLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("User ID: ");
String id = sc.nextLine();
System.out.print("Password: ");
String p1 = sc.nextLine();
System.out.print("Confirm Password: ");
String p2 = sc.nextLine();
if(p1.equals(p2))
System.out.println("Login OK");
else
System.out.println("Password mismatch");
}
}

Feature: Password confirmation

10. Hidden Password Input

import java.io.Console;
public class HiddenPasswordLogin {
public static void main(String[] args) {
Console console = System.console();
if(console == null) {
System.out.println("No console");
return;
}
String user = console.readLine("Username: ");
char[] passChars = console.readPassword("Password: ");
String pass = new String(passChars);
if(user.equals("admin") && pass.equals("secret"))
System.out.println("Welcome!");
}
}

Feature: Hidden password entry

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SECTION 2: VALIDATION-BASED FORMS (11-20)

11. Email Format Validator

public class EmailFormatValidator {
public static boolean isValidEmail(String email) {
return email.contains("@") && email.contains(".");
}
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("Email: ");
String email = sc.nextLine();
if(isValidEmail(email))
System.out.println("Valid format");
else
System.out.println("Invalid format");
}
}

Feature: Email format validation

12. Phone Number Format Validator

public class PhoneFormatValidator {
public static boolean isValidPhone(String phone) {
return phone.matches("\\d{10}");
}
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("Phone (10 digits): ");
String phone = sc.nextLine();
System.out.println(isValidPhone(phone) ? "Valid" : "Invalid");
}
}

Feature: Phone number format check

13. Strong Password Validator

public class StrongPasswordValidator {
public static boolean isStrong(String pass) {
boolean hasUpper = !pass.equals(pass.toLowerCase());
boolean hasLower = !pass.equals(pass.toUpperCase());
boolean hasDigit = pass.matches(".*\\d.*");
boolean hasSpecial = pass.matches(".*[!@#$%].*");
return pass.length()>=8 && hasUpper && hasLower && hasDigit && hasSpecial;
}
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("Password: ");
String pass = sc.nextLine();
System.out.println(isStrong(pass) ? "Strong" : "Weak");
}
}

Feature: Comprehensive password strength check

14. No-Blank Fields Validator

public class NoBlankFields {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("Username: ");
String user = sc.nextLine().trim();
System.out.print("Password: ");
String pass = sc.nextLine().trim();
if(user.isEmpty() || pass.isEmpty())
System.out.println("Fields cannot be empty");
else
System.out.println("Fields OK");
}
}

Feature: Empty field prevention

15. Age Verification Signup

public class AgeVerificationSignup {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("Name: ");
String name = sc.nextLine();
System.out.print("Age: ");
int age = sc.nextInt();
if(age >= 18)
System.out.println(name + ", you can register");
else
System.out.println("Must be 18+");
}
}

Feature: Age restriction

16. Username Availability Check

import java.util.HashSet;
public class UsernameAvailability {
static HashSet<String> taken = new HashSet<>();
static { taken.add("admin"); taken.add("user"); }
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("Choose username: ");
String user = sc.nextLine();
if(taken.contains(user))
System.out.println("Username taken");
else
System.out.println("Available!");
}
}

Feature: Username uniqueness check

17. Password Match Validator

public class PasswordMatchValidator {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("Password: ");
String p1 = sc.nextLine();
System.out.print("Confirm: ");
String p2 = sc.nextLine();
if(p1.equals(p2))
System.out.println("Passwords match");
else
System.out.println("Passwords don't match");
}
}

Feature: Password confirmation

18. Alphanumeric Username Validator

public class AlphanumericUsername {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("Username (letters/numbers only): ");
String user = sc.nextLine();
if(user.matches("[a-zA-Z0-9]+"))
System.out.println("Valid username");
else
System.out.println("Invalid characters");
}
}

Feature: Character restriction

19. Date of Birth Registration

import java.time.LocalDate;
import java.time.Period;
public class DOBRegistration {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("Year of birth: ");
int year = sc.nextInt();
System.out.print("Month: ");
int month = sc.nextInt();
System.out.print("Day: ");
int day = sc.nextInt();
LocalDate dob = LocalDate.of(year, month, day);
int age = Period.between(dob, LocalDate.now()).getYears();
System.out.println("You are " + age + " years old");
}
}

Feature: Age calculation from DOB

20. Gmail-Only Registration

public class GmailOnlyRegistration {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("Email (Gmail only): ");
String email = sc.nextLine();
if(email.toLowerCase().endsWith("@gmail.com"))
System.out.println("Valid Gmail");
else
System.out.println("Only Gmail allowed");
}
}

Feature: Email provider restriction

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SECTION 3: SECURITY-BASED FORMS (21-30)

21. Captcha Verification Login

import java.util.Random;
public class CaptchaLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
Random rand = new Random();
int num1 = rand.nextInt(10);
int num2 = rand.nextInt(10);
System.out.print("What is " + num1 + " + " + num2 + "? ");
int answer = sc.nextInt();
sc.nextLine(); // consume newline
System.out.print("Username: ");
String user = sc.nextLine();
System.out.print("Password: ");
String pass = sc.nextLine();
if(answer == num1 + num2)
System.out.println("Captcha passed. Login attempted.");
else
System.out.println("Captcha failed");
}
}

Feature: Bot prevention

22. Attempt Limiter Login

public class AttemptLimiterLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int attempts = 0;
while(attempts < 3) {
System.out.print("Username: ");
String user = sc.nextLine();
System.out.print("Password: ");
String pass = sc.nextLine();
if(user.equals("admin") && pass.equals("pass")) {
System.out.println("Welcome!");
return;
}
attempts++;
System.out.println("Attempts left: " + (3-attempts));
}
System.out.println("Account locked");
}
}

Feature: Brute force protection

23. Time-Locked Login

import java.time.LocalTime;
public class TimeLockedLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
LocalTime now = LocalTime.now();
int hour = now.getHour();
if(hour >= 9 && hour <= 17) {
System.out.print("Username: ");
String user = sc.nextLine();
System.out.print("Password: ");
String pass = sc.nextLine();
System.out.println("Login attempt during business hours");
} else {
System.out.println("Access only 9 AM - 5 PM");
}
}
}

Feature: Time-based access

24. IP-Based Login Simulation

import java.util.Arrays;
import java.util.List;
public class IPBasedLogin {
static List<String> allowedIPs = Arrays.asList("192.168.1.100", "10.0.0.50");
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("Enter your IP: ");
String ip = sc.nextLine();
if(allowedIPs.contains(ip)) {
System.out.print("Username: ");
String user = sc.nextLine();
System.out.print("Password: ");
String pass = sc.nextLine();
System.out.println("Access from allowed IP");
} else {
System.out.println("IP not authorized");
}
}
}

Feature: IP restriction simulation

25. Session Token Login

import java.util.UUID;
public class SessionTokenLogin {
static String generateToken() {
return UUID.randomUUID().toString();
}
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("Username: ");
String user = sc.nextLine();
System.out.print("Password: ");
String pass = sc.nextLine();
if(user.equals("admin") && pass.equals("pass")) {
String token = generateToken();
System.out.println("Login successful");
System.out.println("Session token: " + token);
}
}
}

Feature: Session token generation

26. Password Hashing Simulation

public class PasswordHashingSimulation {
static int simpleHash(String pass) {
return pass.hashCode();
}
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int storedHash = "secret123".hashCode();
System.out.print("Password: ");
String pass = sc.nextLine();
if(simpleHash(pass) == storedHash)
System.out.println("Login successful");
else
System.out.println("Login failed");
}
}

Feature: Password hashing concept

27. Security Question Login

public class SecurityQuestionLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
String correctAnswer = "fluffy";
System.out.print("Username: ");
String user = sc.nextLine();
System.out.print("Password: ");
String pass = sc.nextLine();
if(user.equals("john") && pass.equals("doe123")) {
System.out.print("Pet's name? ");
String answer = sc.nextLine();
if(answer.equalsIgnoreCase(correctAnswer))
System.out.println("Login successful");
else
System.out.println("Security answer wrong");
}
}
}

Feature: Additional security layer

28. Pattern Lock Simulation

public class PatternLockSimulation {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
String correctPattern = "12369"; // 3x3 grid pattern
System.out.println("Enter pattern (3x3 grid: 1-9): ");
String pattern = sc.nextLine();
if(pattern.equals(correctPattern))
System.out.println("Pattern correct");
else
System.out.println("Pattern incorrect");
}
}

Feature: Pattern lock concept

29. QR Code Login Simulation

public class QRCodeLoginSimulation {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
String qrToken = "qr_xyz_123";
System.out.println("Scan QR code (simulated)");
System.out.print("Enter QR token: ");
String token = sc.nextLine();
if(token.equals(qrToken))
System.out.println("QR login successful");
else
System.out.println("Invalid QR");
}
}

Feature: QR code authentication

30. Face Recognition Simulation

import java.util.Random;
public class FaceRecognitionSimulation {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
Random rand = new Random();
System.out.println("Looking for face...");
System.out.print("Press Enter to simulate scan");
sc.nextLine();
boolean faceDetected = rand.nextBoolean();
if(faceDetected) {
System.out.println("Face recognized! Welcome!");
} else {
System.out.println("Face not recognized");
}
}
}

Feature: Biometric simulation

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SECTION 4: ROLE-BASED FORMS (31-40)

31. Admin/User Login

public class AdminUserLogin {
enum Role { ADMIN, USER, GUEST }
static class Account {
String user; String pass; Role role;
Account(String u, String p, Role r) { user=u; pass=p; role=r; }
}
public static void main(String[] args) {
Account admin = new Account("admin", "adm123", Role.ADMIN);
Account user = new Account("john", "use123", Role.USER);
Scanner sc = new Scanner(System.in);
System.out.print("Username: ");
String u = sc.nextLine();
System.out.print("Password: ");
String p = sc.nextLine();
if(u.equals(admin.user) && p.equals(admin.pass))
System.out.println("Admin access granted");
else if(u.equals(user.user) && p.equals(user.pass))
System.out.println("User access granted");
else
System.out.println("Access denied");
}
}

Feature: Role differentiation

32. Multi-Level Access Login

public class MultiLevelAccessLogin {
static final int LEVEL1 = 1; // basic user
static final int LEVEL2 = 2; // premium user
static final int LEVEL3 = 3; // admin
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("Username: ");
String u = sc.nextLine();
System.out.print("Password: ");
String p = sc.nextLine();
int level = LEVEL1; // check against DB
if(u.equals("admin")) level = LEVEL3;
else if(u.equals("prem")) level = LEVEL2;
switch(level) {
case LEVEL3: System.out.println("Full access"); break;
case LEVEL2: System.out.println("Premium access"); break;
case LEVEL1: System.out.println("Basic access"); break;
}
}
}

Feature: Tiered access levels

33. Department-Based Login

public class DepartmentBasedLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("Employee ID: ");
String id = sc.nextLine();
System.out.print("Password: ");
String pass = sc.nextLine();
String dept = "IT"; // from DB
if(dept.equals("IT"))
System.out.println("Access to IT systems");
else if(dept.equals("HR"))
System.out.println("Access to HR systems");
}
}

Feature: Department-specific access

34. Student/Teacher Login

public class StudentTeacherLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("ID: ");
String id = sc.nextLine();
System.out.print("Password: ");
String pass = sc.nextLine();
if(id.startsWith("S"))
System.out.println("Student portal access");
else if(id.startsWith("T"))
System.out.println("Teacher portal access");
else
System.out.println("Invalid ID format");
}
}

Feature: Educational role separation

35. Parent/Child Login

public class ParentChildLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("Username: ");
String user = sc.nextLine();
System.out.print("Password: ");
String pass = sc.nextLine();
if(user.equals("parent")) {
System.out.println("Parent mode: Full control");
} else if(user.equals("child")) {
System.out.println("Child mode: Restricted");
}
}
}

Feature: Parental controls

36. Guest/Registered Login

public class GuestRegisteredLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("1. Login");
System.out.println("2. Continue as Guest");
System.out.print("Choice: ");
int choice = sc.nextInt();
sc.nextLine();
if(choice == 1) {
System.out.print("Username: ");
String u = sc.nextLine();
System.out.print("Password: ");
String p = sc.nextLine();
System.out.println("Welcome back, " + u);
} else {
System.out.println("Welcome, Guest User");
}
}
}

Feature: Guest access option

37. Manager/Employee Login

public class ManagerEmployeeLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("Username: ");
String user = sc.nextLine();
System.out.print("Password: ");
String pass = sc.nextLine();
if(user.contains("mgr"))
System.out.println("Manager dashboard");
else
System.out.println("Employee dashboard");
}
}

Feature: Work hierarchy access

38. Vendor/Customer Login

public class VendorCustomerLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("Email: ");
String email = sc.nextLine();
System.out.print("Password: ");
String pass = sc.nextLine();
if(email.contains("@vendor.com"))
System.out.println("Vendor portal");
else
System.out.println("Customer portal");
}
}
**
Feature:** B2B/B2C separation
### 39. Contractor/Employee Login

java
public class ContractorEmployeeLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("Username: ");
String user = sc.nextLine();
System.out.print("Password: ");
String pass = sc.nextLine();
if(user.startsWith("emp_"))
System.out.println("Employee benefits access");
else if(user.startsWith("con_"))
System.out.println("Contractor limited access");
}
}

**Feature:** Employment type differentiation
### 40. Regional Access Login

java
public class RegionalAccessLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("Username: ");
String user = sc.nextLine();
System.out.print("Password: ");
String pass = sc.nextLine();
System.out.print("Region (US/EU/ASIA): ");
String region = sc.nextLine();
if(region.equals("US"))
System.out.println("US data access");
else if(region.equals("EU"))
System.out.println("EU data access");
}
}

**Feature:** Geographic restrictions
---
## SECTION 5: 2-FACTOR AUTHENTICATION FORMS (41-50)
### 41. SMS OTP Login

java
import java.util.Random;
public class SMSOTPLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
Random rand = new Random();
System.out.print("Phone: ");
String phone = sc.nextLine();
int otp = 100000 + rand.nextInt(900000);
System.out.println("OTP sent: " + otp);
System.out.print("Enter OTP: ");
int entered = sc.nextInt();
if(entered == otp)
System.out.println("2FA successful");
else
System.out.println("Invalid OTP");
}
}

**Feature:** SMS-based 2FA
### 42. Email OTP Login

java
import java.util.Random;
public class EmailOTPLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
Random rand = new Random();
System.out.print("Email: ");
String email = sc.nextLine();
System.out.print("Password: ");
String pass = sc.nextLine();
int otp = 100000 + rand.nextInt(900000);
System.out.println("Email OTP: " + otp);
System.out.print("Enter OTP: ");
int entered = sc.nextInt();
if(entered == otp)
System.out.println("Login complete");
}
}

**Feature:** Email-based 2FA
### 43. Authenticator App Login

java
public class AuthenticatorAppLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
String secretKey = "JBSWY3DPEHPK3PXP"; // base32
System.out.print("Username: ");
String user = sc.nextLine();
System.out.print("Password: ");
String pass = sc.nextLine();
System.out.print("Authenticator code: ");
String code = sc.nextLine();
// In real app, verify TOTP
if(code.length() == 6)
System.out.println("2FA verified");
}
}

**Feature:** Authenticator app support
### 44. Hardware Token Login
java
public class HardwareTokenLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
String validToken = "123456";
System.out.print("Username: ");
String user = sc.nextLine();
System.out.print("Password: ");
String pass = sc.nextLine();
System.out.print("Hardware token code: ");
String token = sc.nextLine();
if(token.equals(validToken))
System.out.println("2FA successful");
else
System.out.println("Invalid token");
}
}

**Feature:** Hardware token support
### 45. Biometric + Password Login

java
public class BiometricPasswordLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("Place finger on scanner");
System.out.print("Press Enter when done");
sc.nextLine();
boolean fingerprintOK = true; // simulate
if(fingerprintOK) {
System.out.print("Password: ");
String pass = sc.nextLine();
if(pass.equals("secret"))
System.out.println("Both factors verified");
}
}
}

**Feature:** Multi-factor biometric
### 46. Security Key Login

java
public class SecurityKeyLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("Insert security key");
System.out.print("Press Enter to simulate");
sc.nextLine();
boolean keyPresent = true; // simulate
if(keyPresent) {
System.out.print("PIN: ");
String pin = sc.nextLine();
if(pin.equals("1234"))
System.out.println("Login successful");
}
}
}

**Feature:** Physical security key
### 47. Voice Recognition 2FA

java
public class VoiceRecognition2FA {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("Username: ");
String user = sc.nextLine();
System.out.print("Password: ");
String pass = sc.nextLine();
System.out.println("Say your passphrase");
System.out.print("Press Enter when done");
sc.nextLine();
System.out.println("Voice verified. Login complete");
}
}

**Feature:** Voice biometrics
### 48. Location-Based 2FA

java
public class LocationBased2FA {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
String trustedLocation = "Home";
System.out.print("Username: ");
String user = sc.nextLine();
System.out.print("Password: ");
String pass = sc.nextLine();
System.out.print("Current location: ");
String location = sc.nextLine();
if(location.equals(trustedLocation))
System.out.println("Login from trusted location");
else {
System.out.print("2FA code sent to email: ");
String code = sc.nextLine();
System.out.println("2FA verified");
}
}
}

**Feature:** Location-based security
### 49. Time-Based OTP

java
import java.time.LocalTime;
public class TimeBasedOTP {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int seconds = LocalTime.now().getSecond();
int otp = seconds / 10; // changes every 10 seconds
System.out.println("Current OTP: " + otp);
System.out.print("Enter OTP: ");
int entered = sc.nextInt();
if(entered == otp)
System.out.println("Valid OTP");
else
System.out.println("Invalid OTP");
}
}

**Feature:** Time-based codes
### 50. Multi-Channel 2FA

java
import java.util.Random;
public class MultiChannel2FA {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
Random rand = new Random();
int otp = 100000 + rand.nextInt(900000);
System.out.println("1. SMS");
System.out.println("2. Email");
System.out.println("3. Phone call");
System.out.print("Choose 2FA method: ");
int choice = sc.nextInt();
System.out.println("OTP: " + otp + " sent via chosen method");
System.out.print("Enter OTP: ");
int entered = sc.nextInt();
if(entered == otp)
System.out.println("2FA successful");
}
}

**Feature:** Multiple 2FA options
---
## SECTION 6: SOCIAL MEDIA INTEGRATION FORMS (51-60)
### 51. Google Login Simulation

java
public class GoogleLoginSimulation {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("=== Google Login ===");
System.out.print("Google Email: ");
String email = sc.nextLine();
System.out.print("Google Password: ");
String pass = sc.nextLine();
if(email.contains("@gmail.com"))
System.out.println("Google login successful");
}
}

**Feature:** Google authentication
### 52. Facebook Login Simulation

java
public class FacebookLoginSimulation {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("=== Facebook Login ===");
System.out.print("Facebook email/phone: ");
String user = sc.nextLine();
System.out.print("Facebook password: ");
String pass = sc.nextLine();
System.out.println("Redirecting to Facebook…");
System.out.println("Login successful via Facebook");
}
}

**Feature:** Facebook authentication
### 53. Twitter Login Simulation

java
public class TwitterLoginSimulation {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("=== Twitter Login ===");
System.out.print("Twitter handle: ");
String handle = sc.nextLine();
System.out.print("Twitter password: ");
String pass = sc.nextLine();
System.out.println("Authorizing Twitter…");
System.out.println("Twitter login complete");
}
}

**Feature:** Twitter authentication
### 54. LinkedIn Login Simulation

java
public class LinkedInLoginSimulation {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("=== LinkedIn Login ===");
System.out.print("LinkedIn email: ");
String email = sc.nextLine();
System.out.print("LinkedIn password: ");
String pass = sc.nextLine();
System.out.println("Importing profile from LinkedIn");
}
}

**Feature:** LinkedIn authentication
### 55. GitHub Login Simulation

java
public class GitHubLoginSimulation {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("=== GitHub Login ===");
System.out.print("GitHub username: ");
String user = sc.nextLine();
System.out.print("GitHub password: ");
String pass = sc.nextLine();
System.out.println("Accessing repositories…");
}
}

**Feature:** GitHub authentication
### 56. Apple ID Login Simulation

java
public class AppleIDLoginSimulation {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("=== Apple ID Login ===");
System.out.print("Apple ID: ");
String id = sc.nextLine();
System.out.print("Password: ");
String pass = sc.nextLine();
System.out.println("Face ID/Touch ID required");
System.out.print("Press Enter to simulate");
sc.nextLine();
System.out.println("Apple ID verified");
}
}

**Feature:** Apple ID authentication
### 57. Microsoft Account Login

java
public class MicrosoftAccountLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("=== Microsoft Account ===");
System.out.print("Outlook/Hotmail: ");
String email = sc.nextLine();
System.out.print("Password: ");
String pass = sc.nextLine();
System.out.println("Accessing OneDrive…");
}
}

**Feature:** Microsoft authentication
### 58. Instagram Login Simulation

java
public class InstagramLoginSimulation {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("=== Instagram Login ===");
System.out.print("Username/Email: ");
String user = sc.nextLine();
System.out.print("Password: ");
String pass = sc.nextLine();
System.out.println("Syncing photos…");
}
}

**Feature:** Instagram authentication
### 59. Discord Login Simulation

java
public class DiscordLoginSimulation {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("=== Discord Login ===");
System.out.print("Email: ");
String email = sc.nextLine();
System.out.print("Password: ");
String pass = sc.nextLine();
System.out.println("Connecting to servers…");
}
}

**Feature:** Discord authentication
### 60. Spotify Login Simulation

java
public class SpotifyLoginSimulation {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("=== Spotify Login ===");
System.out.print("Email: ");
String email = sc.nextLine();
System.out.print("Password: ");
String pass = sc.nextLine();
System.out.println("Loading playlists…");
}
}

**Feature:** Spotify authentication
---
## SECTION 7: SPECIALIZED FORMS (61-70)
### 61. Fingerprint Scanner Login

java
import java.util.Random;
public class FingerprintScannerLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
Random rand = new Random();
System.out.println("Place finger on scanner");
System.out.print("Press Enter when ready");
sc.nextLine();
int match = rand.nextInt(100);
if(match > 20)
System.out.println("Fingerprint matched!");
else
System.out.println("Fingerprint not recognized");
}
}

**Feature:** Fingerprint simulation
### 62. Iris Scanner Login

java
public class IrisScannerLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("Look into the iris scanner");
System.out.print("Press Enter when ready");
sc.nextLine();
System.out.println("Scanning retina pattern…");
System.out.println("Iris verified. Welcome!");
}
}

**Feature:** Iris recognition
### 63. Palm Vein Scanner

java
public class PalmVeinScanner {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("Place palm on scanner");
System.out.print("Press Enter");
sc.nextLine();
System.out.println("Analyzing vein pattern…");
System.out.println("Palm vein authentication successful");
}
}

**Feature:** Palm vein biometrics
### 64. Signature Verification Login

java
public class SignatureVerificationLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("Draw your signature");
System.out.print("Type your name as signature: ");
String signature = sc.nextLine();
String storedSignature = "John Doe";
if(signature.equalsIgnoreCase(storedSignature))
System.out.println("Signature verified");
else
System.out.println("Signature mismatch");
}
}

**Feature:** Signature verification
### 65. Keystroke Dynamics Login

java
public class KeystrokeDynamicsLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("Type your password naturally");
long start = System.currentTimeMillis();
System.out.print("Password: ");
String pass = sc.nextLine();
long end = System.currentTimeMillis();
long typingTime = end - start;
if(pass.equals("secret") && typingTime > 1000 && typingTime < 3000)
System.out.println("Keystroke pattern matched");
else
System.out.println("Unusual typing pattern");
}
}

**Feature:** Behavioral biometrics
### 66. Mouse Movement Login

java
public class MouseMovementLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("Move mouse in your pattern");
System.out.print("Press Enter when done");
sc.nextLine();
System.out.println("Mouse movement analyzed");
System.out.println("Pattern matches! Login successful");
}
}

**Feature:** Mouse dynamics
### 67. Gait Recognition Login

java
public class GaitRecognitionLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("Walk normally for 5 seconds");
System.out.print("Press Enter when done");
sc.nextLine();
System.out.println("Walking pattern analyzed");
System.out.println("Gait recognized");
}
}

**Feature:** Walking pattern recognition
### 68. Heart Rate Login

java
public class HeartRateLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("Place finger on heart rate sensor");
System.out.print("Enter your heart rate: ");
int hr = sc.nextInt();
if(hr > 50 && hr < 100)
System.out.println("Heart rate valid. Login successful");
else
System.out.println("Abnormal heart rate");
}
}

**Feature:** Vital sign authentication
### 69. Brain Wave Login

java
public class BrainWaveLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("Wear EEG headset");
System.out.print("Press Enter to scan");
sc.nextLine();
System.out.println("Analyzing brain wave patterns…");
System.out.println("Neural signature verified!");
}
}

**Feature:** Neural authentication
### 70. DNA Scan Login

java
public class DNAScanLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("Provide DNA sample");
System.out.print("Press Enter to scan");
sc.nextLine();
System.out.println("Analyzing DNA sequence…");
System.out.println("DNA match found!");
}
}

**Feature:** DNA-based authentication
---
## SECTION 8: ENTERPRISE FORMS (71-80)
### 71. Single Sign-On Simulation

java
public class SingleSignOnSimulation {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("=== Corporate SSO ===");
System.out.print("Company email: ");
String email = sc.nextLine();
System.out.print("Password: ");
String pass = sc.nextLine();
System.out.println("Authenticating with Active Directory…");
System.out.println("SSO token generated");
System.out.println("Access to: Email, CRM, HR, ERP");
}
}

**Feature:** Centralized authentication
### 72. LDAP Login Simulation

java
public class LDAPLoginSimulation {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("=== LDAP Authentication ===");
System.out.print("Domain\Username: ");
String user = sc.nextLine();
System.out.print("Password: ");
String pass = sc.nextLine();
if(user.contains("\"))
System.out.println("LDAP bind successful");
else
System.out.println("Invalid domain format");
}
}

**Feature:** Directory services
### 73. OAuth2 Simulation

java
public class OAuth2Simulation {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("=== OAuth2 Authorization ===");
System.out.println("App requests access to your data");
System.out.println("1. Allow");
System.out.println("2. Deny");
System.out.print("Choice: ");
int choice = sc.nextInt();
if(choice == 1) {
System.out.println("Authorization code: auth_xyz_123");
System.out.println("Exchange code for access token");
}
}
}

**Feature:** Authorization framework
### 74. JWT Token Login

java
import java.util.Base64;
import java.util.Date;
public class JWTTokenLogin {
static String createToken(String user) {
String header = "{\"alg\":\"HS256\"}";
String payload = "{\"user\":\"" + user + "\",\"exp\":" + (new Date().getTime() + 3600000) + "}";
String encoded = Base64.getEncoder().encodeToString(header.getBytes()) + "."
+ Base64.getEncoder().encodeToString(payload.getBytes());
return encoded + ".signature";
}
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.print("Username: ");
String user = sc.nextLine();
System.out.print("Password: ");
String pass = sc.nextLine();
String token = createToken(user);
System.out.println("JWT Token: " + token);
}
}

**Feature:** Token-based authentication
### 75. API Key Login

java
import java.util.UUID;
public class APIKeyLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
String apiKey = UUID.randomUUID().toString();
System.out.println("Your API Key: " + apiKey);
System.out.print("Enter API Key to login: ");
String entered = sc.nextLine();
if(entered.equals(apiKey))
System.out.println("API authenticated");
else
System.out.println("Invalid API key");
}
}

**Feature:** API authentication
### 76. Certificate-Based Login

java
public class CertificateBasedLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("Loading client certificate…");
System.out.print("Certificate serial: ");
String serial = sc.nextLine();
if(serial.length() == 16)
System.out.println("Certificate valid. SSL handshake complete");
else
System.out.println("Invalid certificate");
}
}

**Feature:** SSL/TLS client certificates
### 77. Smart Card Login

java
public class SmartCardLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("Insert smart card");
System.out.print("Press Enter when card detected");
sc.nextLine();
System.out.print("Enter PIN: ");
String pin = sc.nextLine();
if(pin.length() == 4)
System.out.println("Smart card authenticated");
}
}

**Feature:** Physical smart card
### 78. RFID Badge Login

java
public class RFIDBadgeLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("Tap RFID badge");
System.out.print("Enter badge ID: ");
String badge = sc.nextLine();
if(badge.matches("\d{8}"))
System.out.println("RFID badge accepted");
else
System.out.println("Invalid badge");
}
}

**Feature:** RFID authentication
### 79. VPN Login Simulation

java
public class VPNLoginSimulation {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("=== VPN Authentication ===");
System.out.print("Username: ");
String user = sc.nextLine();
System.out.print("Password: ");
String pass = sc.nextLine();
System.out.print("2FA token: ");
String token = sc.nextLine();
System.out.println("Establishing secure tunnel…");
System.out.println("VPN connected");
}
}

**Feature:** VPN authentication
### 80. RADIUS Server Login

java
public class RADIUSServerLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("=== RADIUS Authentication ===");
System.out.print("Network username: ");
String user = sc.nextLine();
System.out.print("Password: ");
String pass = sc.nextLine();
System.out.println("Contacting RADIUS server…");
System.out.println("Access-Accept received");
}
}

**Feature:** Network authentication
---
## SECTION 9: GAMING/ENTERTAINMENT FORMS (81-90)
### 81. Gamertag Login

java
public class GamertagLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("=== Xbox Live Login ===");
System.out.print("Gamertag: ");
String gamertag = sc.nextLine();
System.out.print("Password: ");
String pass = sc.nextLine();
System.out.println("Checking Xbox Live…");
System.out.println("Welcome, " + gamertag + "!");
System.out.println("Friends online: 12");
}
}

**Feature:** Gaming platform login
### 82. Steam Login Simulation

java
public class SteamLoginSimulation {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("=== Steam Login ===");
System.out.print("Account name: ");
String acc = sc.nextLine();
System.out.print("Password: ");
String pass = sc.nextLine();
System.out.print("Steam Guard code: ");
String code = sc.nextLine();
System.out.println("Connecting to Steam network…");
System.out.println("Library loaded: 45 games");
}
}

**Feature:** Steam platform login
### 83. Battle.net Login

java
public class BattleNetLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("=== Battle.net Login ===");
System.out.print("Email: ");
String email = sc.nextLine();
System.out.print("Password: ");
String pass = sc.nextLine();
System.out.println("Checking World of Warcraft account…");
System.out.println("Authenticator required");
System.out.print("Enter authenticator code: ");
String code = sc.nextLine();
System.out.println("Welcome to Battle.net");
}
}

**Feature:** Blizzard authentication
### 84. PlayStation Network Login

java
public class PSNLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("=== PlayStation Network ===");
System.out.print("Online ID: ");
String id = sc.nextLine();
System.out.print("Password: ");
String pass = sc.nextLine();
System.out.println("Signing in to PSN…");
System.out.println("Trophies: 235");
System.out.println("Friends online: 8");
}
}

**Feature:** PlayStation authentication
### 85. Nintendo Account Login

java
public class NintendoAccountLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("=== Nintendo Account ===");
System.out.print("Nickname: ");
String nick = sc.nextLine();
System.out.print("Password: ");
String pass = sc.nextLine();
System.out.println("Checking Nintendo Switch Online…");
System.out.println("Welcome, " + nick + "!");
}
}

**Feature:** Nintendo authentication
### 86. Epic Games Login

java
public class EpicGamesLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("=== Epic Games Login ===");
System.out.print("Display name: ");
String name = sc.nextLine();
System.out.print("Password: ");
String pass = sc.nextLine();
System.out.println("Checking Fortnite account…");
System.out.println("V-Bucks: 1500");
}
}

**Feature:** Epic Games authentication
### 87. Roblox Login

java
public class RobloxLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("=== Roblox Login ===");
System.out.print("Username: ");
String user = sc.nextLine();
System.out.print("Password: ");
String pass = sc.nextLine();
System.out.println("Loading avatar…");
System.out.println("Robux: 250");
}
}

**Feature:** Roblox authentication
### 88. Minecraft Login

java
public class MinecraftLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("=== Minecraft Login ===");
System.out.print("Mojang account: ");
String acc = sc.nextLine();
System.out.print("Password: ");
String pass = sc.nextLine();
System.out.println("Checking license…");
System.out.println("Premium account verified");
System.out.println("Loading multiplayer servers…");
}
}

**Feature:** Minecraft authentication
### 89. Twitch Login

java
public class TwitchLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("=== Twitch Login ===");
System.out.print("Username: ");
String user = sc.nextLine();
System.out.print("Password: ");
String pass = sc.nextLine();
System.out.print("2FA code (if enabled): ");
String code = sc.nextLine();
System.out.println("Connecting to chat…");
System.out.println("Followers: 1250");
}
}

**Feature:** Streaming platform login
### 90. Discord Gaming Login

java
public class DiscordGamingLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("=== Discord Gaming ===");
System.out.print("Email: ");
String email = sc.nextLine();
System.out.print("Password: ");
String pass = sc.nextLine();
System.out.println("Showing game activity…");
System.out.println("Playing: Cyberpunk 2077");
System.out.println("In voice channel: Gaming");
}
}

**Feature:** Gaming social platform
---
## SECTION 10: MISCELLANEOUS/INNOVATIVE FORMS (91-100)
### 91. QR Code Scanner Login

java
public class QRCodeScannerLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("=== QR Code Login ===");
System.out.println("Scan QR code with your phone");
System.out.print("Enter QR data: ");
String qr = sc.nextLine();
if(qr.startsWith("login_")) {
String token = qr.substring(6);
System.out.println("Token: " + token);
System.out.println("Phone confirmed! Logging in…");
}
}
}

**Feature:** QR-based authentication
### 92. Barcode Scanner Login

java
public class BarcodeScannerLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("=== Barcode Login ===");
System.out.println("Scan employee barcode");
System.out.print("Barcode value: ");
String barcode = sc.nextLine();
if(barcode.matches("\d{12}")) {
System.out.print("PIN: ");
String pin = sc.nextLine();
System.out.println("Employee verified");
}
}
}

**Feature:** Barcode authentication
### 93. NFC Tag Login

java
public class NFCTagLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("=== NFC Login ===");
System.out.println("Tap NFC tag");
System.out.print("NFC tag ID: ");
String nfc = sc.nextLine();
if(nfc.length() == 8) {
System.out.println("NFC tag recognized");
System.out.println("Auto-login successful");
}
}
}

**Feature:** NFC authentication
### 94. Bluetooth Proximity Login

java
public class BluetoothProximityLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("=== Bluetooth Login ===");
System.out.println("Searching for paired device…");
System.out.print("Device MAC: ");
String mac = sc.nextLine();
System.out.print("Signal strength (RSSI): ");
int rssi = sc.nextInt();
if(rssi > -50) {
System.out.println("Device in range");
System.out.println("Auto-login activated");
}
}
}

**Feature:** Proximity-based login
### 95. WiFi Network Login

java
public class WiFiNetworkLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("=== WiFi-based Login ===");
System.out.print("Connected WiFi SSID: ");
String ssid = sc.nextLine();
if(ssid.equals("CompanyWiFi")) {
System.out.println("Trusted network detected");
System.out.println("Simplified login enabled");
System.out.print("Quick PIN: ");
String pin = sc.nextLine();
System.out.println("Login successful");
}
}
}

**Feature:** Network-based authentication
### 96. Gesture Password Login

java
public class GesturePasswordLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("=== Gesture Password ===");
System.out.println("Draw your gesture (simulate with letters)");
System.out.println("Example: U=up, D=down, L=left, R=right");
System.out.print("Gesture: ");
String gesture = sc.nextLine();
String correct = "UDRLUD";
if(gesture.equals(correct))
System.out.println("Gesture matched");
else
System.out.println("Wrong gesture");
}
}

**Feature:** Gesture-based authentication
### 97. Color Pattern Login

java
public class ColorPatternLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("=== Color Pattern Login ===");
String[] colors = {"Red", "Blue", "Green", "Yellow", "Purple"};
System.out.println("Select colors in order:");
System.out.println("Available: Red, Blue, Green, Yellow, Purple");
System.out.print("Your pattern (e.g., RGBY): ");
String pattern = sc.nextLine();
String correct = "RBGY";
if(pattern.equalsIgnoreCase(correct))
System.out.println("Color pattern accepted");
}
}

**Feature:** Color-based authentication
### 98. Music Rhythm Login

java
public class MusicRhythmLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("=== Music Rhythm Login ===");
System.out.println("Tap to the beat");
System.out.println("Press Enter for each beat (4 times)");
long[] times = new long[4];
for(int i=0; i<4; i++) {
System.out.print("Tap " + (i+1) + ": ");
sc.nextLine();
times[i] = System.currentTimeMillis();
}
// Check rhythm pattern
System.out.println("Rhythm analyzed");
System.out.println("Login successful");
}
}

**Feature:** Rhythm-based authentication
### 99. Smile Recognition Login

java
public class SmileRecognitionLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("=== Smile Recognition ===");
System.out.println("Look at camera and smile");
System.out.print("Press Enter when ready");
sc.nextLine();
System.out.println("Analyzing smile…");
System.out.println("Unique smile pattern detected!");
System.out.println("Welcome back!");
}
}

**Feature:** Facial expression authentication
### 100. Universal Biometric Login

java
public class UniversalBiometricLogin {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
System.out.println("=== Universal Biometric Login ===");
System.out.println("Choose biometric method:");
System.out.println("1. Fingerprint");
System.out.println("2. Face ID");
System.out.println("3. Iris scan");
System.out.println("4. Voice recognition");
System.out.println("5. Palm vein");
System.out.print("Choice: ");
int choice = sc.nextInt();
sc.nextLine();
System.out.println("Please provide biometric sample…");
System.out.print("Press Enter when ready");
sc.nextLine();
System.out.println("Biometric matched!");
System.out.println("Multi-modal authentication complete");
}
}
```
Feature: Multiple biometric options

---

FEATURE SUMMARY TABLE

Category	Forms	Key Features
Basic Text	1-10	Simple auth, validation
Validation	11-20	Format checks, rules
Security	21-30	Captcha, attempts, hashing
Role-Based	31-40	Access levels, permissions
2FA	41-50	OTP, tokens, multi-factor
Social Media	51-60	Platform integration
Specialized	61-70	Biometrics, behavioral
Enterprise	71-80	SSO, LDAP, certificates
Gaming	81-90	Platform-specific
Miscellaneous	91-100	Innovative methods

COMPREHENSIVE FEATURES LIST

1. Basic Authentication: Username/password verification
2. Input Validation: Format, length, character checks
3. Password Strength: Complexity requirements
4. Security Measures: Captcha, attempt limiting
5. Multi-Factor: 2FA, OTP, biometrics
6. Role Management: Different access levels
7. Social Integration: Third-party login
8. Biometrics: Fingerprint, face, iris, voice
9. Behavioral: Keystroke, mouse, gait
10. Token-Based: JWT, OAuth, API keys
11. Physical Tokens: Smart cards, RFID, NFC
12. Gaming Platforms: Steam, PSN, Xbox
13. Enterprise: LDAP, SSO, certificates
14. Innovative: Gesture, rhythm, smile
15. Proximity: Bluetooth, WiFi, location

Each form serves a unique purpose and can be adapted for specific application requirements. The collection demonstrates the evolution from simple text-based authentication to complex biometric and multi-factor systems.