Security Measures

Comprehensive security measures protecting your conversations

Stork SMS implements comprehensive security measures across all layers of the application to protect user data, prevent attacks, and ensure system integrity.

Authentication Security

Wallet-Based Authentication

• Ed25519 Signatures: Cryptographic signature verification using Solana wallet keys
• Challenge-Response Protocol: Structured signing messages with timestamp and nonce
• Replay Attack Prevention: Time-bounded challenges expire after 10 minutes
• Request Deduplication: Prevents concurrent authentication attempts

Session Management

// Secure session token generation
const sessionToken = jwt.sign({
    wallet_address: walletAddress,
    timestamp: Date.now(),
    nonce: secureNonce
}, JWT_SECRET, { expiresIn: '24h' })

Authentication Flow Security

1. Challenge Generation: Server creates cryptographically secure nonce
2. Message Signing: User signs structured message with private key
3. Signature Verification: Server validates using public key cryptography
4. JWT Generation: Secure token with expiration and wallet metadata
5. Session Validation: Every request validates JWT and wallet ownership

Database Security

Row Level Security (RLS)

-- Chat access control
CREATE POLICY "Wallet chat access" ON public.chats FOR SELECT
USING (
    get_wallet_from_header() IS NOT NULL AND (
        sender_wallet = get_wallet_from_header() OR 
        recipient_wallet = get_wallet_from_header()
    )
);

-- Message access control  
CREATE POLICY "Wallet message access" ON public.messages FOR SELECT
USING (
    EXISTS (
        SELECT 1 FROM public.chats 
        WHERE chats.id = messages.chat_id 
        AND (
            chats.sender_wallet = get_wallet_from_header() OR
            chats.recipient_wallet = get_wallet_from_header()
        )
    )
);

Data Encryption at Rest

• Message Content: AES-256-GCM encrypted before database storage
• Sensitive Metadata: Additional encryption for user data
• Database Encryption: Supabase native encryption for infrastructure
• Backup Security: Encrypted database backups

API Security

Rate Limiting Protection

// Multi-tier rate limiting
const rateLimits = {
    authentication: { requests: 10, window: '1 minute' },
    messaging: { requests: 100, window: '1 minute' },
    nftCreation: { requests: 5, window: '1 minute' },
    general: { requests: 200, window: '1 minute' }
}

Input Validation & Sanitization

• Type Checking: Comprehensive input type validation
• Schema Validation: Zod schemas for API request validation
• SQL Injection Prevention: Parameterized queries and ORM usage
• XSS Protection: Content sanitization and CSP headers

API Authentication Guards

// Protected route authentication
export async function authenticateRequest(request: NextRequest) {
    const authHeader = request.headers.get('authorization')
    const token = authHeader?.replace('Bearer ', '')
    
    if (!token) {
        throw new AuthenticationError('Missing authentication token')
    }
    
    const decoded = jwt.verify(token, JWT_SECRET)
    return decoded.wallet_address
}

Infrastructure Security

TLS/HTTPS Enforcement

• End-to-End TLS: All communications encrypted in transit
• Certificate Pinning: HSTS headers for connection security
• Secure Cookies: HttpOnly and Secure flags for session cookies
• CSP Headers: Content Security Policy prevents XSS attacks

CORS Configuration

// Production CORS settings
const corsOptions = {
    origin: process.env.NODE_ENV === 'production' 
        ? ['https://dapp.stork-sms.net']
        : ['http://localhost:3000', 'http://localhost:3002'],
    credentials: true,
    methods: ['GET', 'POST', 'PUT', 'DELETE'],
    allowedHeaders: ['Content-Type', 'Authorization']
}

Environment Security

• Secret Management: Environment variables for sensitive data
• API Key Rotation: Regular rotation of service API keys
• Dependency Scanning: Automated vulnerability scanning
• Security Headers: Comprehensive security header configuration

Blockchain Security

NFT Ownership Verification

// Real-time ownership verification
async function verifyNFTOwnership(nftAddress: string, walletAddress: string) {
    const connection = new Connection(SOLANA_RPC_URL)
    const tokenAccounts = await connection.getTokenAccountsByOwner(
        new PublicKey(walletAddress),
        { mint: new PublicKey(nftAddress) }
    )
    
    return tokenAccounts.value.length > 0
}

Transaction Security

• Signature Validation: Cryptographic verification of all transactions
• Wallet Address Validation: Public key format verification
• Solana Network Integration: Secure interaction with Solana blockchain
• Metaplex Standards: Compliance with NFT security standards

Smart Contract Security

• Compressed NFTs (cNFTs): Efficient and secure NFT implementation
• Merkle Tree Verification: Cryptographic proof of NFT ownership
• On-Chain Validation: Blockchain-verified access control
• Audit Trail: Immutable transaction history

Monitoring & Logging

Security Event Logging

-- Comprehensive audit trail
CREATE TABLE security_audit_log (
    id SERIAL PRIMARY KEY,
    event_type TEXT NOT NULL,
    wallet_address TEXT,
    ip_address INET,
    user_agent TEXT,
    success BOOLEAN NOT NULL,
    error_message TEXT,
    metadata JSONB,
    created_at TIMESTAMPTZ DEFAULT NOW()
);

Monitored Events

• Authentication Attempts: Success/failure with wallet addresses
• Message Encryption Operations: Encryption/decryption events
• NFT Ownership Verification: Access control validations
• Rate Limit Violations: Suspicious activity detection
• API Errors: Security-relevant error conditions

Alerting System

• Failed Authentication: Multiple failed attempts trigger alerts
• Unusual Activity: Pattern detection for suspicious behavior
• System Errors: Critical security system failures
• Performance Anomalies: Potential DDoS or attack indicators

Error Handling Security

Secure Error Management

// Privacy-safe error responses
class SecurityErrorHandler {
    static sanitizeError(error: Error, context: string): string {
        // Log full error details securely
        console.error(`Security Error [${context}]:`, error)
        
        // Return user-safe error message
        return 'Authentication failed. Please try again.'
    }
}

Information Disclosure Prevention

• Generic Error Messages: No sensitive information in user-facing errors
• Detailed Logging: Full error details logged securely for debugging
• Stack Trace Protection: Stack traces not exposed in production
• Timing Attack Prevention: Consistent response times for auth operations

Client-Side Security

Browser Security Features

• Content Security Policy: Prevents script injection attacks
• Subresource Integrity: Verifies external resource integrity
• Secure Context: HTTPS-only sensitive operations
• Same-Origin Policy: Enforced for sensitive operations

Local Storage Security

// Secure token storage
class SecureStorage {
    static setToken(walletAddress: string, token: string) {
        const key = `auth_token_${walletAddress}`
        localStorage.setItem(key, token)
    }
    
    static clearAllTokens() {
        Object.keys(localStorage).forEach(key => {
            if (key.startsWith('auth_token_')) {
                localStorage.removeItem(key)
            }
        })
    }
}

Memory Security

• Key Clearing: Encryption keys cleared from memory after use
• Cache Limits: Bounded caches prevent memory exhaustion
• Garbage Collection: Explicit cleanup of sensitive data
• No Persistence: Sensitive data not stored persistently

Incident Response

Security Incident Detection

• Automated Monitoring: Real-time security event detection
• Anomaly Detection: Pattern-based suspicious activity identification
• Manual Reporting: User-reported security issues
• Third-Party Alerts: External security service notifications

Response Procedures

1. Immediate Assessment: Rapid evaluation of security incident scope
2. Containment: Isolation of affected systems or accounts
3. Investigation: Detailed analysis of security breach
4. Remediation: Implementation of fixes and security improvements
5. Communication: Transparent user notification when required

Recovery Measures

• Service Restoration: Rapid restoration of secure service
• Data Integrity: Verification of data integrity post-incident
• Security Hardening: Implementation of additional protections
• Post-Incident Review: Analysis and improvement of security measures

Compliance & Standards

Security Standards Compliance

• OWASP Top 10: Protection against common web vulnerabilities
• NIST Cybersecurity Framework: Implementation of security controls
• SOC 2 Type II: Security and availability criteria compliance
• ISO 27001: Information security management principles

Privacy Regulations

• GDPR Compliance: European data protection requirements
• CCPA Compliance: California consumer privacy rights
• Data Minimization: Collection of only necessary data
• User Rights: Access, deletion, and portability rights

Security Testing

Automated Security Testing

• SAST: Static application security testing
• DAST: Dynamic application security testing
• Dependency Scanning: Automated vulnerability detection
• Container Scanning: Security scanning of deployment containers

Manual Security Testing

• Penetration Testing: Regular third-party security assessments
• Code Reviews: Security-focused code review processes
• Architecture Reviews: Security assessment of system design
• Red Team Exercises: Simulated attack scenarios

Bug Bounty Program

• Community Security Testing: Incentivized security research
• Responsible Disclosure: Coordinated vulnerability disclosure
• Reward Structure: Compensation for security findings
• Scope Definition: Clear boundaries for security testing

Future Security Enhancements

Planned Improvements

• Hardware Security Modules: Enhanced key protection
• Multi-Factor Authentication: Additional authentication factors
• Advanced Threat Detection: ML-based security monitoring
• Zero Trust Architecture: Comprehensive identity verification

Emerging Threats Protection

• Quantum Resistance: Post-quantum cryptography preparation
• AI/ML Attacks: Protection against automated attacks
• Supply Chain Security: Enhanced dependency verification
• Cloud Security: Advanced cloud-native security measures

Stork SMS security is continuously evolving to address emerging threats and maintain the highest standards of user protection and data security.