# Security Review Report - Goal-6-Task-1 (Scheduler System)

## Review Scope
- File: orchestrator/scheduler.py
- Security Requirements: symphony-ai-agent/security/security-requirements.md
- Test Report: symphony-ai-agent/testing/Goal-6-Task-1/Goal-6-Task-1-test-report.md

## Findings

### Encryption Implementation (AES-256)
✅ **Verified Secure Implementation**
- Uses proper AES-256-GCM from cryptography.hazmat (security/encrypt.py)
- Correct key length validation (32 bytes)
- Secure nonce generation (os.urandom)
- Proper tag handling for authentication
- Encryption applied to all sensitive task data (callbacks)

### Timing Accuracy (±1s)
⚠️ **Functional Issue (Non-Security)**
- Implementation claims ±1s accuracy in docstring
- Test report indicates requirement not met
- Recommendation: Address in functional testing

## Recommendations
1. Update test cases to verify encryption:
   - Verify encrypted data cannot be decrypted with wrong key
   - Verify encrypted data changes with same input (nonce uniqueness)
2. Clarify timing accuracy as functional vs security requirement
3. Add negative test cases for encryption:
   - Invalid key lengths
   - Tampered ciphertext
   - Reused nonce detection

## Security Validation Checklist Update
- [x] AES-256 encryption properly implemented
- [x] Key management secure (32-byte requirement)
- [x] Sensitive data encrypted at rest
- [ ] Additional test coverage recommended (see above)