Chapter 17. javax.crypto and Subpackages

This chapter documents the cryptographic features (including encryption and decryption) of the javax.crypto package and its subpackages. These packages were originally part of the Java Cryptography Extension (JCE) before being integrated into Java 1.4, which is why they have the "javax" extension prefix. All of the commonly-used cryptography classes are in the javax.crypto package itself. The javax.crypto.interfaces subpackage defines algorithm-specific interfaces for certain type of cryptographic keys. The javax.crypto.spec subpackage defines classes that provide a transparent, portable, and provider-independent representation of cryptographic keys and related objects.