The audit started at midnight. The system logs were clean, but the TLS configuration was not.
FFIEC guidelines for TLS are not optional. They are binding for financial institutions that handle sensitive data. Weak encryption, outdated protocol versions, and misconfigured cipher suites are a direct compliance failure. Regulators check them. Attackers exploit them.
The Federal Financial Institutions Examination Council (FFIEC) states that TLS must be configured to use current, secure versions — TLS 1.2 or TLS 1.3. Versions 1.0 and 1.1 are deprecated and must be disabled. Strong cipher suites such as AES-GCM should replace weaker algorithms like RC4 or 3DES. Forward secrecy is required to protect past communications if keys are ever compromised. Certificate validation must be strict to prevent man-in-the-middle interception.
A compliant TLS configuration also aligns with NIST SP 800-52r2, which FFIEC references. That means enforcing secure renegotiation, removing support for null or export-grade ciphers, and disabling compression to mitigate CRIME attacks. Every endpoint handling financial data should be tested using automated scanners to verify these standards. Handshakes must negotiate securely without fallback to deprecated protocols.