FIPS 140-3 is the current U.S. government standard for cryptographic modules that protect sensitive data. It defines how encryption algorithms, hardware security modules, and key management systems must be designed, implemented, and validated. If your systems process Controlled Unclassified Information (CUI), financial records, healthcare data, or other regulated information, compliance is not optional.
Sensitive data under FIPS 140-3 includes any information that requires confidentiality and integrity under federal law or industry mandates. This could be authentication keys, personal identifiers, or proprietary business secrets. The standard enforces strict requirements: algorithms must be vetted, cryptographic keys must be generated with approved methods, and modules must withstand both logical and physical attacks.
The core of FIPS 140-3 is its security levels. Level 1 mandates the use of approved algorithms and functional testing. Level 2 adds role-based authentication and tamper-evidence. Level 3 requires identity-based authentication and physical tamper-resistance. Level 4 brings complete protection against environmental attacks and significant intrusion detection. Choosing the right level depends on the threat model and the sensitivity of the data you protect.
Implementation mistakes often break compliance. Using non-approved ciphers, storing secrets in unsecured memory, or failing to isolate cryptographic boundaries can lead to data leaks and failed audits. The standard also defines how modules must behave under attack—keys should be zeroized if the device detects tampering, ensuring sensitive data cannot be recovered.