KeyPair and KeyPairGenerator Classes

This section describes the KeyPair and KeyPairGenerator Classes. The KeyPairGenerator.generateKeyPair() can be used to generate a private and public key pair.

java.security.KeyPair is a final class representing a key pair (a public key and a private key). Major methods in the KeyPair class:

getPrivate() - Returns a PriviateKey object representing the private key in the key pair.

getPublic() - Returns a PublicKey object representing the public key in the key pair.

java.security.KeyPairGenerator is an abstract class providing a link to implementation classes of private and public key pair generration algorithms provided by various security package providers. Major methods in the KeyPairGenerator class:

getInstance() - Returns a KeyPairGenerator object of the specified algorithm from the implementation of the specified provider. If provider is not specified, the default implementation is used. This is a static method.

initialize() - Initializes the key pair generator with the specified key size.

generateKeyPair() - Generates a key pair and returns a KeyPair object.

getAlgorithm() - Returns the algorithm name of the current key pair generator object.

getProvider() - Returns the provider as a provider object of the current key pair generator object.

See the next section for a sample program on how to use the java.security.KeyPairGenerator class.

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

 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

 Private and Public Keys and Related Interfaces

KeyPair and KeyPairGenerator Classes

 Key Pair Sample Program - JcaKeyPair.java

 DSA Private Key and Public Key Pair Sample

 RSA Private Key and Public Key Pair Sample

 DiffieHellman Private Key and Public Key Pair Sample

 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