HKDFbased
HKDFbased refers to cryptographic constructions that utilize the HMAC-based Key Derivation Function (HKDF) as a core component. HKDF is a standard algorithm defined in RFC 5869 that extracts a fixed-length pseudorandom key from a potentially variable-length secret input and a salt. It then expands this extracted key into one or more pseudorandom keys of a desired length, also optionally using a context-specific information string. This two-stage process, extraction and expansion, makes HKDF robust against various weaknesses found in simpler key derivation methods.
HKDFbased protocols and systems leverage this robust key derivation to securely generate cryptographic keys for various