# Audit Framework

## Audit Logging

### What is Logged

| Event Type | Details Captured |
|------------|------------------|
| Authentication | User ID, timestamp, IP, success/failure |
| Application Actions | User, action, application ID, before/after state |
| Document Access | User, document ID, action (view/download) |
| Configuration Changes | User, setting, old value, new value |
| System Events | Service, event type, severity |

### Log Format

```json
{
  "timestamp": "2026-02-09T10:30:00.000Z",
  "eventType": "APPLICATION_APPROVED",
  "userId": "DEPT-OFFICER-001",
  "sessionId": "sess_abc123",
  "ipAddress": "10.0.1.50",
  "resource": {
    "type": "APPLICATION",
    "id": "APP-2026-00001"
  },
  "action": "APPROVE",
  "previousState": "IN_REVIEW",
  "newState": "APPROVED",
  "metadata": {
    "stage": "SUPERVISOR_APPROVAL",
    "notes": "Documents verified"
  }
}
```

### Log Retention

| Log Type | Retention Period |
|----------|------------------|
| Security events | 7 years |
| Application actions | 7 years |
| System logs | 1 year |
| Debug logs | 30 days |

## Audit Reports

### Standard Reports

| Report | Frequency | Recipients |
|--------|-----------|------------|
| Login Activity | Daily | Security team |
| Application Processing | Weekly | Department heads |
| SLA Compliance | Weekly | Management |
| System Health | Daily | IT operations |

### On-Demand Reports

Available through Admin Console:
- User activity by date range
- Application history
- Document access log
- Configuration change history

## Compliance Audits

### Internal Audits

- Quarterly access review
- Annual security assessment
- Monthly SLA review

### External Audits

- Annual third-party security audit
- Regulatory compliance review as required
- Blockchain transaction verification

## Tamper Detection

Audit logs are protected by:
- Append-only storage
- Cryptographic hash chaining
- Separate log storage from application database
- Real-time replication to secure archive
