M03: Insecure Authentication/Authorization - Prevention

Prevention Strategy Overview
Authentication Best Practices
Session Management
Authorization Implementation
Token Security
Biometric Authentication
Multi-Factor Authentication
Monitoring and Response
Implementation Checklist

Prevention Strategy Overview

Securing authentication and authorization requires a comprehensive, defense-in-depth approach across multiple layers:


Security Layers:

Strong Authentication → Complex passwords, MFA, secure methods
Session Security → Secure tokens, timeouts, proper lifecycle
Server-Side Authorization → Every endpoint verified
Token Protection → Secure storage, encryption, validation
Continuous Monitoring → Detect anomalies and respond
Regular Audits → Test and improve security posture



Authentication Best Practices

1. Password Security

Enforce Strong Password Policies:

javascript
// Password validation example
const validatePassword = (password) => {
  const requirements = {
    minLength: 12,
    requireUppercase: /[A-Z]/,
    requireLowercase: /[a-z]/,
    requireNumber: /[0-9]/,
    requireSpecial: /[!@#$%^&*(),.?":{}|<>]/
  };
  
  if (password.length < requirements.minLength) {
    return { valid: false, error: 'Password must be at least 12 characters' };
  }
  if (!requirements.requireUppercase.test(password)) {
    return { valid: false, error: 'Password must contain uppercase letter' };
  }
  if (!requirements.requireLowercase.test(password)) {
    return { valid: false, error: 'Password must contain lowercase letter' };
  }
  if (!requirements.requireNumber.test(password)) {
    return { valid: false, error: 'Password must contain a number' };
  }
  if (!requirements.requireSpecial.test(password)) {
    return { valid: false, error: 'Password must contain special character' };
  }
  
  return { valid: true };
};



Password Storage - Server Side:

python
Use bcrypt for password hashing
import bcrypt

def hash_password(password):
    # Generate salt and hash password
    salt = bcrypt.gensalt(rounds=12)  # Cost factor of 12
    hashed = bcrypt.hashpw(password.encode('utf-8'), salt)
    return hashed

def verify_password(password, hashed):
    # Verify password against hash
    return bcrypt.checkpw(password.encode('utf-8'), hashed)

Never store passwords in plain text
Never use weak hashing (MD5, SHA1)
Always use adaptive hashing (bcrypt, scrypt, Argon2)



Password Best Practices:

✅ Minimum 12 characters length
✅ Complexity requirements (uppercase, lowercase, numbers, special chars)
✅ Password strength meter for user feedback
✅ Common password blacklist (password123, etc.)
✅ Breach detection integration (Have I Been Pwned API)
✅ Password expiration for sensitive accounts
✅ Password history to prevent reuse


2. Rate Limiting and Account Lockout

Implement Rate Limiting:

javascript
// Express middleware for rate limiting
const rateLimit = require('express-rate-limit');

const loginLimiter = rateLimit({
  windowMs: 15  60  1000, // 15 minutes
  max: 5, // Limit each IP to 5 requests per windowMs
  message: 'Too many login attempts, please try again later',
  standardHeaders: true,
  legacyHeaders: false,
  // Store in Redis for distributed systems
  store: new RedisStore({
    client: redisClient,
    prefix: 'rl:login:'
  })
});

app.post('/api/login', loginLimiter, async (req, res) => {
  // Login logic here
});



Account Lockout Implementation:

python
Track failed login attempts
def handle_login_attempt(username, password):
    user = get_user(username)
    
    if not user:
        # Don't reveal if user exists
        return {'success': False, 'error': 'Invalid credentials'}
    
    # Check if account is locked
    if user.locked_until and user.locked_until > datetime.now():
        return {
            'success': False, 
            'error': 'Account locked due to too many failed attempts'
        }
    
    # Verify password
    if not verify_password(password, user.password_hash):
        user.failed_attempts += 1
        
        # Lock account after 5 failed attempts
        if user.failed_attempts >= 5:
            user.locked_until = datetime.now() + timedelta(minutes=30)
            send_security_alert(user.email, 'Account locked')
        
        user.save()
        return {'success': False, 'error': 'Invalid credentials'}
    
    # Successful login - reset counter
    user.failed_attempts = 0
    user.locked_until = None
    user.save()
    
    return {'success': True, 'token': generate_token(user)}



Rate Limiting Best Practices:

✅ Limit login attempts (5 per 15 minutes)
✅ Implement progressive delays after failures
✅ CAPTCHA after multiple failed attempts
✅ Account lockout with notification
✅ IP-based and account-based limits
✅ Distributed rate limiting for scalability


3. Secure Credential Transmission

Always Use HTTPS with Certificate Pinning:

kotlin
// Android - Certificate Pinning with OkHttp
val hostname = "api.yourapp.com"
val certificatePinner = CertificatePinner.Builder()
    .add(hostname, "sha256/AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA=")
    .add(hostname, "sha256/BBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBBB=")
    .build()

val client = OkHttpClient.Builder()
    .certificatePinner(certificatePinner)
    .build()

swift
// iOS - Certificate Pinning
class NetworkManager: NSObject, URLSessionDelegate {
    func urlSession(_ session: URLSession, 
                   didReceive challenge: URLAuthenticationChallenge, 
                   completionHandler: @escaping (URLSession.AuthChallengeDisposition, URLCredential?) -> Void) {
        
        guard let serverTrust = challenge.protectionSpace.serverTrust else {
            completionHandler(.cancelAuthenticationChallenge, nil)
            return
        }
        
        let pinnedCertificates = [/ Your certificate data /]
        
        if validateCertificate(serverTrust, against: pinnedCertificates) {
            completionHandler(.useCredential, URLCredential(trust: serverTrust))
        } else {
            completionHandler(.cancelAuthenticationChallenge, nil)
        }
    }
}



Session Management

1. Secure Token Generation

Generate Cryptographically Secure Tokens:

javascript
// Node.js - Secure token generation
const crypto = require('crypto');

function generateSecureToken() {
  // Generate 32 bytes of random data
  return crypto.randomBytes(32).toString('hex');
}

function generateJWT(userId, role) {
  const jwt = require('jsonwebtoken');
  
  const payload = {
    userId: userId,
    role: role,
    iat: Math.floor(Date.now() / 1000),
    exp: Math.floor(Date.now() / 1000) + (60 * 60), // 1 hour expiration
  };
  
  // Use strong secret from environment variable
  const secret = process.env.JWT_SECRET; // Minimum 256 bits
  
  return jwt.sign(payload, secret, { algorithm: 'HS256' });
}



Token Generation Best Practices:

✅ Use cryptographically secure random generation
✅ Sufficient token length (minimum 256 bits)
✅ Include expiration time
✅ Use strong signing keys (256+ bits)
✅ Rotate signing keys periodically


2. Session Timeout and Invalidation

Implement Proper Session Lifecycle:

python
Session management with Redis
import redis
from datetime import timedelta

redis_client = redis.Redis()

SESSION_TIMEOUT = 30 * 60  # 30 minutes
ABSOLUTE_TIMEOUT = 8  60  60  # 8 hours

def create_session(user_id, device_id):
    session_id = generate_secure_token()
    
    session_data = {
        'user_id': user_id,
        'device_id': device_id,
        'created_at': time.time(),
        'last_activity': time.time()
    }
    
    # Store session with expiration
    redis_client.setex(
        f'session:{session_id}',
        SESSION_TIMEOUT,
        json.dumps(session_data)
    )
    
    return session_id

def validate_session(session_id):
    session_json = redis_client.get(f'session:{session_id}')
    
    if not session_json:
        return None
    
    session = json.loads(session_json)
    
    # Check absolute timeout
    if time.time() - session['created_at'] > ABSOLUTE_TIMEOUT:
        invalidate_session(session_id)
        return None
    
    # Update last activity and extend session
    session['last_activity'] = time.time()
    redis_client.setex(
        f'session:{session_id}',
        SESSION_TIMEOUT,
        json.dumps(session)
    )
    
    return session

def invalidate_session(session_id):
    redis_client.delete(f'session:{session_id}')



Session Management Best Practices:

✅ Idle timeout: 15-30 minutes
✅ Absolute timeout: 8-12 hours
✅ Regenerate session ID on login
✅ Invalidate session on logout (client and server)
✅ Single concurrent session or manage multiple
✅ Session binding to device/IP (with flexibility for mobile)


3. Secure Token Storage - Mobile

Android - Secure Storage:

kotlin
// Use Android Keystore for token encryption
class SecureTokenStorage(private val context: Context) {
    private val sharedPreferences = context.getSharedPreferences(
        "secure_prefs", 
        Context.MODE_PRIVATE
    )
    
    private val keyStore = KeyStore.getInstance("AndroidKeyStore").apply {
        load(null)
    }
    
    fun saveToken(token: String) {
        val encryptedToken = encryptToken(token)
        sharedPreferences.edit()
            .putString("auth_token", encryptedToken)
            .apply()
    }
    
    fun getToken(): String? {
        val encryptedToken = sharedPreferences.getString("auth_token", null)
        return encryptedToken?.let { decryptToken(it) }
    }
    
    fun clearToken() {
        sharedPreferences.edit().remove("auth_token").apply()
    }
    
    private fun encryptToken(token: String): String {
        val cipher = Cipher.getInstance("AES/GCM/NoPadding")
        val key = getOrCreateKey()
        cipher.init(Cipher.ENCRYPT_MODE, key)
        
        val iv = cipher.iv
        val encrypted = cipher.doFinal(token.toByteArray())
        
        return Base64.encodeToString(iv + encrypted, Base64.DEFAULT)
    }
    
    private fun getOrCreateKey(): SecretKey {
        if (!keyStore.containsAlias("auth_key")) {
            val keyGenerator = KeyGenerator.getInstance(
                KeyProperties.KEY_ALGORITHM_AES,
                "AndroidKeyStore"
            )
            keyGenerator.init(
                KeyGenParameterSpec.Builder(
                    "auth_key",
                    KeyProperties.PURPOSE_ENCRYPT or KeyProperties.PURPOSE_DECRYPT
                )
                .setBlockModes(KeyProperties.BLOCK_MODE_GCM)
                .setEncryptionPaddings(KeyProperties.ENCRYPTION_PADDING_NONE)
                .build()
            )
            keyGenerator.generateKey()
        }
        
        return (keyStore.getEntry("auth_key", null) as KeyStore.SecretKeyEntry).secretKey
    }
}



iOS - Keychain Storage:

swift
// iOS - Secure Keychain storage
class SecureTokenStorage {
    func saveToken(_ token: String) {
        let data = token.data(using: .utf8)!
        
        let query: [String: Any] = [
            kSecClass as String: kSecClassGenericPassword,
            kSecAttrAccount as String: "authToken",
            kSecValueData as String: data,
            kSecAttrAccessible as String: kSecAttrAccessibleWhenUnlockedThisDeviceOnly
        ]
        
        // Delete existing item
        SecItemDelete(query as CFDictionary)
        
        // Add new item
        SecItemAdd(query as CFDictionary, nil)
    }
    
    func getToken() -> String? {
        let query: [String: Any] = [
            kSecClass as String: kSecClassGenericPassword,
            kSecAttrAccount as String: "authToken",
            kSecReturnData as String: true
        ]
        
        var result: AnyObject?
        let status = SecItemCopyMatching(query as CFDictionary, &result)
        
        guard status == errSecSuccess,
              let data = result as? Data,
              let token = String(data: data, encoding: .utf8) else {
            return nil
        }
        
        return token
    }
    
    func clearToken() {
        let query: [String: Any] = [
            kSecClass as String: kSecClassGenericPassword,
            kSecAttrAccount as String: "authToken"
        ]
        
        SecItemDelete(query as CFDictionary)
    }
}



Authorization Implementation

1. Server-Side Authorization Checks

Enforce Authorization on Every Endpoint:

python
Python/Flask - Authorization decorator
from functools import wraps
from flask import request, jsonify

def require_auth(f):
    @wraps(f)
    def decorated_function(args, *kwargs):
        token = request.headers.get('Authorization')
        
        if not token:
            return jsonify({'error': 'No authorization token'}), 401
        
        user = validate_token(token)
        if not user:
            return jsonify({'error': 'Invalid token'}), 401
        
        # Add user to request context
        request.user = user
        return f(args, *kwargs)
    
    return decorated_function

def require_role(role):
    def decorator(f):
        @wraps(f)
        def decorated_function(args, *kwargs):
            if not hasattr(request, 'user'):
                return jsonify({'error': 'Not authenticated'}), 401
            
            if request.user.role != role:
                return jsonify({'error': 'Insufficient privileges'}), 403
            
            return f(args, *kwargs)
        return decorated_function
    return decorator

Usage
@app.route('/api/admin/users', methods=['GET'])
@require_auth
@require_role('admin')
def get_all_users():
    users = User.query.all()
    return jsonify([user.to_dict() for user in users])



2. Prevent IDOR Vulnerabilities

Always Verify Resource Ownership:

javascript
// Node.js - Resource ownership verification
app.get('/api/orders/:orderId', authenticateUser, async (req, res) => {
  const orderId = req.params.orderId;
  const userId = req.user.id; // From authentication middleware
  
  try {
    const order = await Order.findById(orderId);
    
    if (!order) {
      return res.status(404).json({ error: 'Order not found' });
    }
    
    // CRITICAL: Verify ownership
    if (order.userId !== userId && req.user.role !== 'admin') {
      // Log potential IDOR attempt

securityLogger.warn(IDOR attempt: User ${userId} tried to access order ${orderId});


      return res.status(403).json({ error: 'Access denied' });
    }
    
    res.json(order);
  } catch (error) {
    res.status(500).json({ error: 'Internal server error' });
  }
});



Use Non-Predictable Identifiers:

python
Use UUIDs instead of sequential IDs
import uuid

class Order(db.Model):
    # Instead of auto-incrementing integer ID
    id = db.Column(db.String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
    user_id = db.Column(db.String(36), db.ForeignKey('users.id'), nullable=False)
    # ... other fields



3. Implement Proper Access Control

Role-Based Access Control (RBAC):

python
Define permissions system
class Permission:
    READ_USERS = 'read:users'
    WRITE_USERS = 'write:users'
    DELETE_USERS = 'delete:users'
    READ_ORDERS = 'read:orders'
    WRITE_ORDERS = 'write:orders'

class Role:
    ADMIN = {
        Permission.READ_USERS,
        Permission.WRITE_USERS,
        Permission.DELETE_USERS,
        Permission.READ_ORDERS,
        Permission.WRITE_ORDERS
    }
    
    USER = {
        Permission.READ_ORDERS  # Only read own orders
    }
    
    GUEST = set()  # No permissions

def check_permission(user, required_permission):
    user_permissions = Role.__dict__.get(user.role, set())
    return required_permission in user_permissions

Middleware
def require_permission(permission):
    def decorator(f):
        @wraps(f)
        def decorated_function(args, *kwargs):
            if not check_permission(request.user, permission):
                return jsonify({'error': 'Insufficient permissions'}), 403
            return f(args, *kwargs)
        return decorated_function
    return decorator



Token Security

JWT Best Practices

javascript
// Secure JWT implementation
const jwt = require('jsonwebtoken');

const JWT_CONFIG = {
  accessTokenExpiry: '15m',  // Short-lived access tokens
  refreshTokenExpiry: '7d',   // Longer refresh tokens
  algorithm: 'HS256',
  issuer: 'your-app-name',
  audience: 'your-app-api'
};

function generateTokenPair(userId, role) {
  const accessToken = jwt.sign(
    {
      userId: userId,
      role: role,
      type: 'access'
    },
    process.env.JWT_ACCESS_SECRET,
    {
      expiresIn: JWT_CONFIG.accessTokenExpiry,
      algorithm: JWT_CONFIG.algorithm,
      issuer: JWT_CONFIG.issuer,
      audience: JWT_CONFIG.audience
    }
  );
  
  const refreshToken = jwt.sign(
    {
      userId: userId,
      type: 'refresh',
      tokenId: generateUniqueId() // For revocation
    },
    process.env.JWT_REFRESH_SECRET,
    {
      expiresIn: JWT_CONFIG.refreshTokenExpiry,
      algorithm: JWT_CONFIG.algorithm,
      issuer: JWT_CONFIG.issuer,
      audience: JWT_CONFIG.audience
    }
  );
  
  return { accessToken, refreshToken };
}

function validateAccessToken(token) {
  try {
    const decoded = jwt.verify(token, process.env.JWT_ACCESS_SECRET, {
      algorithms: [JWT_CONFIG.algorithm],
      issuer: JWT_CONFIG.issuer,
      audience: JWT_CONFIG.audience
    });
    
    if (decoded.type !== 'access') {
      throw new Error('Invalid token type');
    }
    
    return decoded;
  } catch (error) {
    return null;
  }
}



Biometric Authentication

Secure Biometric Implementation

Android - BiometricPrompt:

kotlin
class BiometricAuthManager(private val activity: FragmentActivity) {
    
    fun authenticate(onSuccess: () -> Unit, onError: (String) -> Unit) {
        val executor = ContextCompat.getMainExecutor(activity)
        
        val biometricPrompt = BiometricPrompt(activity, executor,
            object : BiometricPrompt.AuthenticationCallback() {
                override fun onAuthenticationSucceeded(result: BiometricPrompt.AuthenticationResult) {
                    super.onAuthenticationSucceeded(result)
                    
                    // IMPORTANT: Verify on server side
                    verifyBiometricOnServer { serverVerified ->
                        if (serverVerified) {
                            onSuccess()
                        } else {
                            onError("Server verification failed")
                        }
                    }
                }
                
                override fun onAuthenticationError(errorCode: Int, errString: CharSequence) {
                    super.onAuthenticationError(errorCode, errString)
                    onError(errString.toString())
                }
            })
        
        val promptInfo = BiometricPrompt.PromptInfo.Builder()
            .setTitle("Biometric Authentication")
            .setSubtitle("Authenticate to access your account")
            .setNegativeButtonText("Cancel")
            .setAllowedAuthenticators(BiometricManager.Authenticators.BIOMETRIC_STRONG)
            .build()
        
        biometricPrompt.authenticate(promptInfo)
    }
    
    private fun verifyBiometricOnServer(callback: (Boolean) -> Unit) {
        // Send biometric verification to server
        // Server checks if biometric auth is enabled for user
        // Server validates the authentication event
        // Only then grant access
    }
}



Biometric Security Checklist:

✅ Use platform biometric APIs (BiometricPrompt, LocalAuthentication)
✅ Require server-side verification
✅ Set appropriate authenticator strength requirements
✅ Implement fallback authentication (with equal security)
✅ Detect and prevent root/jailbreak
✅ Implement anti-tampering measures


Multi-Factor Authentication

TOTP Implementation

python
Time-based One-Time Password (TOTP)
import pyotp
import qrcode

def generate_mfa_secret(user_id):
    # Generate secret key
    secret = pyotp.random_base32()
    
    # Store secret for user (encrypted)
    user = User.query.get(user_id)
    user.mfa_secret = encrypt(secret)
    user.mfa_enabled = False  # Not enabled until verified
    user.save()
    
    # Generate QR code for authenticator app
    totp = pyotp.TOTP(secret)
    provisioning_uri = totp.provisioning_uri(
        name=user.email,
        issuer_name='YourApp'
    )
    
    return {
        'secret': secret,
        'qr_code_uri': provisioning_uri
    }

def verify_mfa_code(user_id, code):
    user = User.query.get(user_id)
    
    if not user.mfa_enabled:
        return False
    
    secret = decrypt(user.mfa_secret)
    totp = pyotp.TOTP(secret)
    
    # Verify code (allows 30 second window)
    return totp.verify(code, valid_window=1)

def enable_mfa(user_id, verification_code):
    user = User.query.get(user_id)
    
    secret = decrypt(user.mfa_secret)
    totp = pyotp.TOTP(secret)
    
    if totp.verify(verification_code):
        user.mfa_enabled = True
        user.save()
        
        # Generate backup codes
        backup_codes = generate_backup_codes(user_id)
        
        return {'success': True, 'backup_codes': backup_codes}
    
    return {'success': False, 'error': 'Invalid verification code'}



Monitoring and Response

Security Event Logging

javascript
// Log security events
const SecurityEvent = {
  LOGIN_SUCCESS: 'login_success',
  LOGIN_FAILURE: 'login_failure',
  LOGOUT: 'logout',
  PASSWORD_CHANGE: 'password_change',
  MFA_ENABLED: 'mfa_enabled',
  MFA_DISABLED: 'mfa_disabled',
  SUSPICIOUS_ACTIVITY: 'suspicious_activity',
  IDOR_ATTEMPT: 'idor_attempt',
  RATE_LIMIT_HIT: 'rate_limit_hit'
};

function logSecurityEvent(eventType, userId, metadata = {}) {
  const event = {
    timestamp: new Date().toISOString(),
    eventType: eventType,
    userId: userId,
    ip: metadata.ip,
    userAgent: metadata.userAgent,
    location: metadata.location,
    details: metadata.details
  };
  
  // Log to security monitoring system
  securityLogger.info(event);
  
  // Alert on critical events
  if (isCriticalEvent(eventType)) {
    sendSecurityAlert(event);
  }
}



Implementation Checklist

Authentication Checklist


□ Strong password policy (12+ chars, complexity requirements)
□ Passwords hashed with bcrypt/Argon2 (not MD5/SHA1)
□ Rate limiting on authentication endpoints (5 attempts/15 min)
□ Account lockout after failed attempts
□ CAPTCHA after multiple failures
□ Secure credential transmission (HTTPS + cert pinning)
□ MFA implementation and enforcement
□ Password breach detection
□ Common password blacklist
□ Secure password reset flow



Session Management Checklist


□ Cryptographically secure token generation
□ Appropriate session timeouts (15-30 min idle)
□ Absolute session timeout (8-12 hours)
□ Session invalidation on logout (client + server)
□ Session regeneration on privilege change
□ Secure token storage (Keychain/Keystore)
□ Session binding to device (with mobile considerations)
□ Concurrent session management
□ Token rotation for refresh tokens
□ Token revocation mechanism



Authorization Checklist


□ Server-side authorization on all endpoints
□ Resource ownership verification
□ Non-predictable resource identifiers (UUIDs)
□ Role-based access control (RBAC)
□ Function-level access control
□ Horizontal privilege escalation prevention
□ Vertical privilege escalation prevention
□ API authorization enforcement
□ Admin function protection
□ Regular authorization audits



Biometric Authentication Checklist


□ Platform biometric APIs used (not custom)
□ Server-side verification required
□ Strong authenticator requirement
□ Secure fallback mechanism
□ Root/jailbreak detection
□ Anti-tampering measures
□ Biometric enrollment verification
□ User can disable biometric auth



Token Security Checklist


□ Short-lived access tokens (15 minutes)
□ Longer refresh tokens (7 days max)
□ Strong signing keys (256+ bits)
□ Algorithm whitelist (no "none", no mixed)
□ Token expiration enforced
□ Token signature verification
□ Secure token storage
□ Token rotation on refresh
□ Token revocation capability
□ Tokens not in URLs or logs

Key Takeaways

Always enforce authentication and authorization server-side
Use strong, adaptive password hashing (bcrypt, Argon2)
Implement rate limiting and account lockout
Require MFA for sensitive applications
Validate resource ownership on every request
Use secure session management with appropriate timeouts
Store tokens securely using platform security features
Monitor and log security events for detection and response

Next Steps

Examples: See vulnerable vs secure code implementations
Interactive Lab: Practice implementing secure authentication
Attack Vectors: Review how attacks exploit weak auth

---

Remember: Security is not a feature you add at the end—it must be designed in from the start. Defense in depth is essential for robust authentication and authorization.

M03: Insecure Authentication/Authorization - Prevention

Table of Contents

Prevention Strategy Overview

Authentication Best Practices

1. Password Security

Use bcrypt for password hashing

Never store passwords in plain text

Never use weak hashing (MD5, SHA1)

Always use adaptive hashing (bcrypt, scrypt, Argon2)

2. Rate Limiting and Account Lockout

Track failed login attempts

3. Secure Credential Transmission

Session Management

1. Secure Token Generation

2. Session Timeout and Invalidation

Session management with Redis

3. Secure Token Storage - Mobile

Authorization Implementation

1. Server-Side Authorization Checks

Python/Flask - Authorization decorator

Usage

2. Prevent IDOR Vulnerabilities

Use UUIDs instead of sequential IDs

3. Implement Proper Access Control

Define permissions system

Middleware

Token Security

JWT Best Practices

Biometric Authentication

Secure Biometric Implementation

Multi-Factor Authentication

TOTP Implementation

Time-based One-Time Password (TOTP)

Monitoring and Response

Security Event Logging

Implementation Checklist

Authentication Checklist

Session Management Checklist

Authorization Checklist

Biometric Authentication Checklist

Token Security Checklist

Key Takeaways

Next Steps