Methods:
1. TLS Client Certificates
   - Mutual TLS (mTLS)
   - Certificate-based identity
   - Strong security

2. Token-Based Auth
   - JWT tokens
   - API keys
   - Session tokens

3. Username/Password
   - Basic authentication
   - LDAP/AD integration
   - Less secure, not recommended

Role-Based Access Control (RBAC):

Roles:
- Admin: Full cluster access
- User: Lock operations only
- ReadOnly: Read-only access

Permissions:
- lock.acquire
- lock.release
- lock.read
- cluster.admin

Example:
User "app1" can:
- Acquire locks under /app1/*
- Cannot access /app2/*
- Cannot modify cluster config

TLS Configuration:
- TLS 1.3 required
- Strong cipher suites
- Certificate validation
- Perfect forward secrecy

Client-Server: TLS
Server-Server: mTLS

Encryption Options:
1. Disk Encryption (OS-level)
2. Database Encryption (RocksDB)
3. Application-level Encryption

Recommended: Disk encryption + TLS

{
  "timestamp": "2024-01-03T19:30:00Z",
  "event": "lock_acquired",
  "client_id": "app1",
  "lock_path": "/app/resource",
  "fencing_token": 12345,
  "session_id": "sess_abc123",
  "source_ip": "10.0.1.100"
}

Requirements:
- SOC 2 compliance
- Audit trail retention (7 years)
- Access logging
- Change tracking
- Incident response