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. 
package org.bouncycastle.math.ec;


Interface for classes storing precomputation data for multiplication
algorithms. Used as a Memento (see GOF patterns) for
WNafMultiplier.

/**
 * Interface for classes storing precomputation data for multiplication
 * algorithms. Used as a Memento (see GOF patterns) for
 * <code>WNafMultiplier</code>.
 */
interface PreCompInfo
{
}