javax.crypto.SecretKey - The Secret Key Interface

This section provides a quick introduction of secret key and symmetric encryption algorithm. The secret key interface, javax.crypto.SecretKey, is also described.

What is a Secret Key? A secrete key is the key used in a symmetric encryption algorithm, where the same key is used both the encryption process and the decryption process.

Known symmetric encryption algorithms:

The secrect key concept is supported in JDK through the JCE (Java Cryptography Extension) package. The first thing I want to learn in JCE is the javax.crypto.SecretKey interface.

javax.crypto.SecretKey is an interface providing a grouping point for various secret keys. It extents java.security.Key, and inherits 3 methods:

getAlgorithm() - Returns the algorithm name used to generate the key.

getEncoded() - Returns the key as a byte array in its primary encoding format.

getFormat() - Returns the name of the primary encoding format of this key.

Last update: 2013.

Table of Contents

 About This Book

 Cryptography Terminology

 Cryptography Basic Concepts

 Introduction to AES (Advanced Encryption Standard)

 Introduction to DES Algorithm

 DES Algorithm - Illustrated with Java Programs

 DES Algorithm Java Implementation

 DES Algorithm - Java Implementation in JDK JCE

 DES Encryption Operation Modes

 DES in Stream Cipher Modes

 PHP Implementation of DES - mcrypt

 Blowfish - 8-Byte Block Cipher

Secret Key Generation and Management

javax.crypto.SecretKey - The Secret Key Interface

 javax.crypto.KeyGenerator - Generating Secret Keys

 Converting Secret Keys to and from Byte Arrays

 JceSecretKeyTest.java - Secret Key Test Program

 Cipher - Secret Key Encryption and Decryption

 Introduction of RSA Algorithm

 RSA Implementation using java.math.BigInteger Class

 Introduction of DSA (Digital Signature Algorithm)

 Java Default Implementation of DSA

 Private key and Public Key Pair Generation

 PKCS#8/X.509 Private/Public Encoding Standards

 Cipher - Public Key Encryption and Decryption

 MD5 Mesasge Digest Algorithm

 SHA1 Mesasge Digest Algorithm

 OpenSSL Introduction and Installation

 OpenSSL Generating and Managing RSA Keys

 OpenSSL Managing Certificates

 OpenSSL Generating and Signing CSR

 OpenSSL Validating Certificate Path

 "keytool" and "keystore" from JDK

 "OpenSSL" Signing CSR Generated by "keytool"

 Migrating Keys from "keystore" to "OpenSSL" Key Files

 Certificate X.509 Standard and DER/PEM Formats

 Migrating Keys from "OpenSSL" Key Files to "keystore"

 Using Certificates in IE (Internet Explorer)

 Using Certificates in Firefox

 Using Certificates in Google Chrome

 Outdated Tutorials

 References

 PDF Printing Version