Critical security parameter
Critical security parameter
(also CSP)
Critical security parameter definition
A critical security parameter is data that is essential to the secure operation of a cryptographic module.
The loss, compromise, or unauthorized disclosure of a CSP weakens the security of a cryptographic module, so CSPs require stringent protection.
See also: biometric device, biometric security, biometric authentication, biometric data, passcode, encryption key
Examples of CSPs
- Cryptographic keys. Private keys, public keys, and symmetric keys. They are used in encryption, decryption, digital signatures, and other cryptographic operations.
- Seed values. These initial values generate a sequence of random or pseudorandom numbers used for generating cryptographic keys.
- PINs. PINs authenticate users in various systems, especially common in banking.
- Passwords and passphrases. Used for accessing cryptographic modules, encrypting keys, or authenticating users.
- Secret and private key components. Parts of a cryptographic key that — when combined — reconstruct the original key.
- Digital certificates. Used in public key infrastructure (PKI), these certificates verify the ownership of a public key.
- Security policies configuration data. Configuration settings that control the operation of a cryptographic module: algorithms, key lengths, and modes of operation.
- Cryptographic seed material. Used to derive keys and other cryptographic parameters.
- Initialization vectors (IVs) and nonces. Used in certain encryption modes to ensure that the same plaintext will not result in the same ciphertext when encrypted multiple times.
- Biometric templates. Systems that use biometrics for authentication consider stored biometric data a CSP.