Package org.bouncycastle.crypto.agreement

Class ECDHBasicAgreement

  • All Implemented Interfaces:
    BasicAgreement
    public class ECDHBasicAgreement
extends java.lang.Object
implements BasicAgreement
    P1363 7.2.1 ECSVDP-DH ECSVDP-DH is Elliptic Curve Secret Value Derivation Primitive, Diffie-Hellman version. It is based on the work of [DH76], [Mil86], and [Kob87]. This primitive derives a shared secret value from one party's private key and another party's public key, where both have the same set of EC domain parameters. If two parties correctly execute this primitive, they will produce the same output. This primitive can be invoked by a scheme to derive a shared secret key; specifically, it may be used with the schemes ECKAS-DH1 and DL/ECKAS-DH2. It assumes that the input keys are valid (see also Section 7.2.2).

    • Method Summary

      All Methods Instance Methods Concrete Methods 
      Modifier and Type Method Description
      java.math.BigInteger calculateAgreement​(CipherParameters pubKey)
      given a public key from a given party calculate the next message in the agreement sequence.
      int getFieldSize()
      return the field size for the agreement algorithm in bytes.
      void init​(CipherParameters key)
      initialise the agreement engine.

      • Methods inherited from class java.lang.Object

        clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait