Java In A Nutshell, 5th Edition

This java.security.spec.AlgorithmParameterSpec is a transparent representation of an initialization vector or IV. An IV is required for block ciphers used in feedback mode, such as DES in CBC mode.

public class IvParameterSpec implements java.security.spec.AlgorithmParameterSpec { // Public Constructors public IvParameterSpec (byte[ ] iv ); public IvParameterSpec (byte[ ] iv , int offset , int len ); // Public Instance Methods public byte[ ] getIV ( ); }