http://www.bouncycastle.org/java.html: The Bouncy Castle Crypto package is a Java implementation of cryptographic algorithms. This jar contains JCE provider and lightweight API for the Bouncy Castle Cryptography APIs for JDK 1.5 to JDK 1.7. 
package org.bouncycastle.jce.interfaces;

import java.security.PublicKey;


Static/ephemeral public key pair for use with ECMQV key agreement

/**
 * Static/ephemeral public key pair for use with ECMQV key agreement
 */
public interface MQVPublicKey
    extends PublicKey
{
    
return the static public key.

/**
     * return the static public key.
     */
    PublicKey getStaticKey();

    
return the ephemeral public key.

/**
     * return the ephemeral public key.
     */
    PublicKey getEphemeralKey();
}