# Goal-2-Task-4 Work Log

## Task: Audit Logging Integration

### Initial Assessment
- Need to implement comprehensive audit logging in RBACEngine
- Must meet SYM-SEC-004 requirements
- Current implementation lacks:
  - HMAC integrity protection
  - Complete field set
  - Thread-safe sequence numbering

### Implementation Plan
1. Update `_audit_access_attempt()` to:
   - Include all required fields from specification
   - Add HMAC signature
   - Implement thread-safe sequence numbering
2. Add `verify_audit_log_integrity()` method
3. Write unit tests for new functionality

### Changes Required
1. Add fields to audit log entries:
   - Timestamp (UTC)
   - Sequence number
   - Operation type
   - Role involved  
   - Certificate fingerprint
   - Result (success/failure)
   - HMAC signature
2. Implement HMAC-SHA256 signing
3. Add thread-safe sequence counter

### Started Implementation
[2025-05-05 15:57:00] Beginning RBACEngine audit logging enhancements