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 1.8.
  • The Legion of the Bouncy Castle Inc. 
package org.bouncycastle.crypto;


General interface fdr classes that produce and validate commitments.

/**
 * General interface fdr classes that produce and validate commitments.
 */
public interface Committer
{
    
Generate a commitment for the passed in message.

Params:
  • message – the message to be committed to,
Returns:a Commitment
/**
     * Generate a commitment for the passed in message.
     *
     * @param message the message to be committed to,
     * @return a Commitment
     */
    Commitment commit(byte[] message);

    
Return true if the passed in commitment represents a commitment to the passed in maessage.

Params:
  • commitment – a commitment previously generated.
  • message – the message that was expected to have been committed to.
Returns:true if commitment matches message, false otherwise.
/**
     * Return true if the passed in commitment represents a commitment to the passed in maessage.
     *
     * @param commitment a commitment previously generated.
     * @param message the message that was expected to have been committed to.
     * @return true if commitment matches message, false otherwise.
     */
    boolean isRevealed(Commitment commitment, byte[] message);
}