# Security Documentation
## Epic: Security Documentation
Comprehensive security and privacy documentation covering encryption, JWT security, rate limiting, audit logging, and GDPR compliance.
**Estimated Duration**: 4h | **Phase**: 2 | **Priority**: high | **Complexity**: Standard
## Wave Context
Wave 3 (Feature Documentation) - Parallel Stream 3
Can run in parallel with: Phase 2.1, 2.2, 2.4, 2.5
## Tasks
- [ ] Create docs/SECURITY.md (10m)
- [ ] Document AES-256-GCM encryption (45m) - API key storage, encryption at rest
- [ ] Explain JWT session security (45m) - Token signing, validation, expiration
- [ ] Detail rate limiting (40m) - 100/min free, 500/min premium, headers, errors
- [ ] Document audit logging (40m) - R2 bucket storage, log format, retention
- [ ] Add GDPR compliance notes (30m) - Data protection, user rights, data deletion
- [ ] Security best practices (40m) - User responsibilities, secure configuration
## Acceptance Criteria
- [ ] All security measures documented comprehensively
- [ ] Encryption details technically accurate
- [ ] Rate limiting behavior clear
- [ ] Audit logging explained
- [ ] GDPR compliance addressed
## Dependencies
- Depends on: Phase 1.1 (CLAUDE.md)
- Parallel with: Phase 2.1, 2.2, 2.4, 2.5
## Resources
- [src/security/encryption.ts](src/security/encryption.ts)
- [src/security/audit.ts](src/security/audit.ts)
- [src/middleware/rate-limit.ts](src/middleware/rate-limit.ts)
