## Uses of Class
net.i2p.crypto.HKDF

- Packages that use HKDF
  Package | Description
  --- | ---
  net.i2p.router.crypto.ratchet | Implementation of ECIES-X25519-AEAD-Ratchet cryptographic protocol (I2P proposal 144), providing forward secrecy and enhanced security for I2P transport communications.

- - ### Uses of HKDF in net.i2p.router.crypto.ratchet

    Constructors in net.i2p.router.crypto.ratchet with parameters of type HKDF
    Constructor and Description
    `RatchetTagSet(HKDF hkdf, HandshakeState state, SessionKey rootKey, SessionKey data, long date)` Outbound NSR Tagset
    `RatchetTagSet(HKDF hkdf, SessionKey rootKey, SessionKey data, long date, int tagsetid, int keyid)` Outbound ES Tagset
    `RatchetTagSet(HKDF hkdf, SessionTagListener lsnr, HandshakeState state, SessionKey rootKey, SessionKey data, long date, int minSize, int maxSize)` Inbound NSR Tagset
    `RatchetTagSet(HKDF hkdf, SessionTagListener lsnr, PublicKey remoteKey, SessionKey rootKey, SessionKey data, long date, int tagsetid, int keyid, int minSize, int maxSize)` Inbound ES Tagset
    `SplitKeys(HandshakeState state, HKDF hkdf)`