NIST SP 800-123
Cryptography

NIST SP 800-123 4: Server Cryptography - Encryption, Key Management, Certificates

Apply Section 5.3 cryptography including: encryption of data at rest (AES-256 + FIPS 140-3 validated modules + full disk encryption + file-level encryption + database encryption) + data in transit (TLS 1.3 + IPsec + SSH 2.0 + S/MIME + PGP) + key management per NIST SP 800-57 + NIST SP 800-152 + key lifecycle (generation + storage + distribution + rotation + revocation + escrow + destruction) + certificate management (X.509 + ACME + Let's Encrypt + DigiCert + private CA) + Post-Quantum Cryptography migration per FIPS 203/204/205 (ML-KEM + ML-DSA + SLH-DSA).

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