Hazina implements defense-in-depth security with encryption, input validation, secure headers, rate limiting, and automated vulnerability scanning.

Please DO NOT create public GitHub issues for security vulnerabilities.

Instead, report security issues to: security@hazina.ai (or your organization's security email)

Include:

• Description of the vulnerability
• Steps to reproduce
• Potential impact
• Suggested fix (if any)

We aim to respond within 48 hours and provide a fix within 7 days for critical issues.

Encrypted Storage:

• API keys encrypted at rest using ASP.NET Core Data Protection
• Keys stored in %LocalAppData%\Hazina\DataProtection-Keys
• Automatic key rotation every 90 days

Usage:

services.AddHazinaSecurity();

// Store encrypted secret
await secretManager.StoreSecretAsync("openai-key", apiKey);

// Retrieve and decrypt
var key = await secretManager.GetSecretAsync("openai-key");

Environment Variable Fallback:

• Automatically falls back to environment variables
• Prevents accidental secret commits
• Supports Azure Key Vault, AWS Secrets Manager integration

Protection Against:

• SQL Injection
• Command Injection
• XSS (Cross-Site Scripting)
• Path Traversal
• LDAP Injection

Validation Patterns:

services.AddHazinaInputValidation();

// Validate SQL input
var result = validator.ValidateInput(input, InputValidationType.Sql);
if (!result.IsValid)
{
    return BadRequest("Potential SQL injection detected");
}

// Sanitize HTML
var safe = validator.SanitizeInput(userInput, SanitizationType.Html);

// Validate file paths
if (!validator.IsSafeFilePath(path, basePath))
{
    return Forbid("Path traversal detected");
}

Detection Patterns:

• SQL: UNION, DROP, --, ;, xp_, sp_
• Command: |, &, ;, $, `, ()
• XSS: <script>, javascript:, on*=
• Path: ../, ..\\, ~

Implemented Headers:

• Strict-Transport-Security: HSTS with 1-year max-age
• Content-Security-Policy: Restrict resource origins
• X-Content-Type-Options: Prevent MIME sniffing
• X-Frame-Options: Clickjacking protection
• X-XSS-Protection: Legacy XSS filter
• Referrer-Policy: Control referrer information
• Permissions-Policy: Feature permissions

Configuration:

app.UseHazinaSecurityHeaders(options => {
    options.EnableStrictTransportSecurity = true;
    options.ContentSecurityPolicy = "default-src 'self'; script-src 'self' 'unsafe-inline'";
    options.XFrameOptionsValue = "DENY";
});

Default CSP:

default-src 'self';
script-src 'self' 'unsafe-inline' 'unsafe-eval';
style-src 'self' 'unsafe-inline';
img-src 'self' data: https:;
font-src 'self' data:;
connect-src 'self';
frame-ancestors 'none';

Protection Against:

• Brute force attacks
• DDoS attacks
• API abuse
• Resource exhaustion

Token Bucket Algorithm:

• Configurable request limits
• Per-client tracking (IP-based)
• Automatic token refill
• Custom client identification

Configuration:

app.UseHazinaRateLimiting(options => {
    options.MaxRequests = 100;        // 100 requests
    options.WindowSeconds = 60;        // per 60 seconds
    options.RetryAfterSeconds = 60;   // Retry-After header
    options.ExcludedPaths = new List<string> { "/health", "/metrics" };
});

Response Headers:

• X-RateLimit-Limit: Maximum requests allowed
• X-RateLimit-Remaining: Requests remaining
• X-RateLimit-Reset: Unix timestamp of window reset
• Retry-After: Seconds until retry (when limited)

Distributed Tracing:

• Unique request identifier
• Tracks requests across services
• Enables audit logging
• Facilitates incident investigation

Configuration:

app.UseHazinaCorrelationId(options => {
    options.HeaderName = "X-Correlation-ID";
    options.IncludeInResponse = true;
    options.CorrelationIdGenerator = () => Guid.NewGuid().ToString("N");
});

Usage:

var correlationId = HttpContext.GetCorrelationId();
logger.LogInformation("Processing request {CorrelationId}", correlationId);

Recommended Patterns:

JWT Bearer Tokens:

services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
    .AddJwtBearer(options => {
        options.TokenValidationParameters = new TokenValidationParameters
        {
            ValidateIssuer = true,
            ValidateAudience = true,
            ValidateLifetime = true,
            ValidateIssuerSigningKey = true,
            ValidIssuer = "hazina",
            ValidAudience = "hazina-api",
            IssuerSigningKey = new SymmetricSecurityKey(key)
        };
    });

API Key Authentication:

services.AddAuthentication()
    .AddScheme<ApiKeyAuthenticationOptions, ApiKeyAuthenticationHandler>("ApiKey", options => {
        options.HeaderName = "X-API-Key";
        options.ValidateKey = async (key) => {
            return await apiKeyService.ValidateAsync(key);
        };
    });

Automated Scans:

• Trivy: Filesystem and Docker image scanning
• CodeQL: Static application security testing (SAST)
• Dependabot: Dependency vulnerability alerts
• SBOM: Software Bill of Materials generation

CI/CD Integration:

# .github/workflows/build-and-test.yml
- name: Run Trivy vulnerability scanner
  uses: aquasecurity/trivy-action@master
  with:
    scan-type: 'fs'
    severity: 'CRITICAL,HIGH'

- name: Initialize CodeQL
  uses: github/codeql-action/init@v3
  with:
    queries: +security-and-quality

SARIF Upload: All security findings are uploaded to GitHub Security tab for tracking and remediation.

Docker Hardening:

• Multi-stage builds (smaller attack surface)
• Non-root user execution
• Read-only root filesystem (where possible)
• Security updates in base image
• Minimal base image (aspnet:9.0)

Dockerfile Best Practices:

# Use official Microsoft images
FROM mcr.microsoft.com/dotnet/aspnet:9.0

# Install security updates
RUN apt-get update && apt-get upgrade -y

# Create non-root user
RUN groupadd -r hazina && useradd -r -g hazina hazina

# Switch to non-root user
USER hazina

# Health check
HEALTHCHECK --interval=30s --timeout=3s CMD curl -f http://localhost:8080/health

Encryption at Rest:

• API keys encrypted using Data Protection API
• Database connection strings in secure configuration
• Secrets in environment variables or key vaults

Encryption in Transit:

• TLS 1.2+ required for HTTPS
• Certificate validation enforced
• HSTS header enforces HTTPS

PII Protection:

• Structured logging avoids logging secrets
• Sensitive data masked in logs
• GDPR-compliant data handling patterns

Security Events Logged:

• Authentication attempts (success/failure)
• Authorization failures
• Rate limit violations
• Input validation failures
• API key usage
• Suspicious patterns

Log Format:

{
  "@timestamp": "2026-01-05T10:30:00.123Z",
  "level": "Warning",
  "message": "Rate limit exceeded",
  "correlationId": "abc123",
  "clientId": "192.168.1.100",
  "path": "/api/chat",
  "severity": "Medium"
}

1. Never commit secrets to version control
2. Use environment variables for configuration
3. Validate all user input before processing
4. Sanitize output to prevent XSS
5. Use parameterized queries to prevent SQL injection
6. Keep dependencies updated (use Dependabot)
7. Run security scans before committing
8. Follow principle of least privilege
9. Enable security logging in production
10. Review security alerts regularly

1. Rotate secrets every 90 days minimum
2. Use strong passwords (16+ characters, mixed case, symbols)
3. Enable TLS/HTTPS for all public endpoints
4. Configure firewall rules to restrict access
5. Monitor security logs for suspicious activity
6. Keep systems patched and up to date
7. Backup encryption keys securely
8. Test disaster recovery procedures
9. Implement network segmentation
10. Use intrusion detection systems

• OWASP Top 10: Protection against all major web vulnerabilities
• CWE/SANS Top 25: Mitigation of most dangerous software weaknesses
• GDPR: Data protection and privacy-by-design patterns
• SOC 2: Security, availability, confidentiality controls
• NIST: Cybersecurity framework alignment

Static Analysis:

• SonarQube
• Security Code Scan
• .NET Security Guard

Dynamic Analysis:

• OWASP ZAP
• Burp Suite
• Postman Security Tests

Container Scanning:

• Trivy
• Snyk Container
• Clair

Dependency Scanning:

• Dependabot
• Snyk Open Source
• WhiteSource

Secret Scanning:

• TruffleHog
• GitGuardian
• GitHub Secret Scanning

1. Detection: Monitor logs, alerts, security events
2. Containment: Isolate affected systems
3. Eradication: Remove malicious code, patch vulnerabilities
4. Recovery: Restore systems from clean backups
5. Lessons Learned: Update security controls

• Security Team: security@hazina.ai
• Incident Response: ir@hazina.ai
• Emergency: +1-555-SECURITY

• Mutual TLS (mTLS) for service-to-service authentication
• Hardware Security Module (HSM) integration
• Advanced threat detection with machine learning
• Automated penetration testing
• Security Information and Event Management (SIEM) integration
• Zero Trust Network Access (ZTNA)

• OWASP Top 10
• CWE Top 25
• NIST Cybersecurity Framework
• Microsoft Security Development Lifecycle
• GDPR Compliance

• 2026-01-05: Initial security policy with Phase 1 security hardening
• Future: Planned enhancements for advanced threat detection

Last Updated: 2026-01-05 Version: 1.0.0