The DBA Problem: How Hash Chaining Fixes EF Core's Audit Log Vulnerability

Traditional audit logs have a critical blind spot: database administrators can tamper with logs to hide unauthorized changes, making standard audit trails unreliable for compliance and security in sensitive applications. By implementing cryptographic hash chaining—a blockchain-inspired technique—EF Core audit logs become mathematically tamper-evident, ensuring any manipulation attempt leaves permanent, detectable evidence. This shift from 'trust-based' to 'zero-trust' audit architecture is essential for organizations handling financial or healthcare data.