# Package org.bouncycastle.crypto.agreement.kdf

Support classes for KDF based key derivation functions.

- Class Summary
  Class | Description
  --- | ---
  ConcatenationKDFGenerator | Generator for Concatenation Key Derivation Function defined in NIST SP 800-56A, Sect 5.8.1
  DHKDFParameters |
  DHKEKGenerator | RFC 2631 Diffie-hellman KEK derivation function.
  ECDHKEKGenerator | X9.63 based key derivation function for ECDH CMS.
  GSKKDFParameters | BSI Key Derivation Function Parameters for Session Keys (see BSI-TR-03111 Section 4.3.3)
  GSKKFDGenerator | BSI Key Derivation Function for Session Keys (see BSI-TR-03111 Section 4.3.3)