AzelusLightvale-ComfyUI-ARG-Toolkit/web/docs/X963KDF_Derive.md

X963KDF Key Derivation

Derives a key using the ANSI X9.63 Key Derivation Function.

Source library: cryptography

Overview

This node implements the Key Derivation Function specified in ANSI X9.63, which is commonly used in elliptic curve cryptography standards for deriving keys from a shared secret. Its structure is similar to ConcatKDFHash.

This KDF is suitable for deriving keys from a shared secret, but it is not intended for hashing passwords.

Parameters

• message: The shared secret (Z) to derive the key from, as a BYTESLIKE object.
• length: The desired length of the derived key in bytes.
• algorithm: The hash function to use (e.g., SHA256).
• info: (Optional) Shared information as a BYTESLIKE object, used to bind the key to a specific context.

Outputs

• derived_key: The resulting derived key as a BYTESLIKE object.