- OAuth 2.0 with OpenID Connect
- JWT-based authentication with short-lived access tokens (15-30 minutes)
- Secure HTTP-only, SameSite cookies for refresh tokens
- Multi-factor authentication (MFA) support
- Passwordless login option
- Social login providers (Google, GitHub, etc.)
- Role-Based Access Control (RBAC)
- Attribute-Based Access Control (ABAC) for fine-grained permissions
- Principle of least privilege
- Token invalidation on logout
- TLS 1.3 for all communications
- End-to-end encryption for sensitive notes (AES-256)
- Encryption at rest for all databases
- Secure key management using AWS KMS/Hashicorp Vault
- GDPR/CCPA compliance
- Right to be forgotten implementation
- Data retention policies
- Regular data purging of inactive accounts
- Strict input validation on all endpoints
- Protection against XSS, SQL Injection, CSRF
- Content Security Policy (CSP) headers
- Rate limiting and DDoS protection
- API versioning
- Request validation middleware
- Request/response logging (PII redacted)
- API rate limiting (sliding window algorithm)
- VPC with private subnets
- Web Application Firewall (WAF) rules
- DDoS protection
- Regular vulnerability scanning
- Centralized logging (ELK Stack)
- Security Information and Event Management (SIEM)
- Intrusion Detection System (IDS)
- Regular security audits
- Security code reviews
- Dependency scanning (OWASP Dependency-Check)
- Static Application Security Testing (SAST)
- Dynamic Application Security Testing (DAST)
- Security incident response plan
- Regular security training for team
- Bug bounty program
- Regular penetration testing
Strict-Transport-Security: max-age=31536000; includeSubDomains
X-Content-Type-Options: nosniff
X-Frame-Options: DENY
X-XSS-Protection: 1; mode=block
Content-Security-Policy: default-src 'self';
Referrer-Policy: no-referrer
Permissions-Policy: geolocation=(), microphone=(), camera=()
- Vendor security assessments
- Regular third-party dependency updates
- Security SLAs with providers
- Data processing agreements