ai-agent/symphony-ai-agent/security/reviews/Goal-6-Task-1-security-review.md

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

• AES-256 encryption properly implemented
• Key management secure (32-byte requirement)
• Sensitive data encrypted at rest
• Additional test coverage recommended (see above)