Cipher : Java Glossary

2008-06-19 by Roedy Green ©1996-2009 Canadian Mind Products
index page for letter ⇒ punctuation 0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z (all)

Cipher

Here’s how to encrypt and decrypt a message using CipherOutputStream/ CipherInputStream The methods used are all part of Sun’s JCE. Sun’s JCE documenation is all but useless. You pretty well have to Google the web to find sample code to use these methods for particular algorithms and block modes.

AES Encryption

Requires a shared secret key between sender and receiver.

RSA Public/Private Key Encryption

Requires sender to know public key of receiver, and receiver requires the corresponding private key.

Learning More

The Javadoc is almost useless. All the methods have undocumented parameters that are specific to various algorithms. Your best bet is to scour the Internet with Google, e.g. search for PBE DECRYPT_MODE to find Java source code listings where people used the PBE algorithm and Cipher. DECRYPT_MODE to decrypt messages. Beware, much of the code you will find is not working properly. People posted it seeking help getting it to work. Another source of information is books on JCE.

Sun’s Javadoc on the Cipher class : available:

on the web at java.sun.com
in the current JDK 1.6.0_11 or in the old JDK 1.5.0_17 on your local Windows J: drive.

Sun’s Javadoc on the CipherInputStream class : available:

on the web at java.sun.com
in the current JDK 1.6.0_11 or in the old JDK 1.5.0_17 on your local Windows J: drive.

Sun’s Javadoc on the CipherOutputStream class : available:

on the web at java.sun.com
in the current JDK 1.6.0_11 or in the old JDK 1.5.0_17 on your local Windows J: drive.

Sun’s Javadoc on the KeyGenerator class : available:

on the web at java.sun.com
in the current JDK 1.6.0_11 or in the old JDK 1.5.0_17 on your local Windows J: drive.

Sun’s Javadoc on the SecretKey class : available:

on the web at java.sun.com
in the current JDK 1.6.0_11 or in the old JDK 1.5.0_17 on your local Windows J: drive.

Sun’s Javadoc on the SecretKeySpec class : available:

on the web at java.sun.com
in the current JDK 1.6.0_11 or in the old JDK 1.5.0_17 on your local Windows J: drive.

Sun’s JDK Technote Guide on cryptography algorithm names : available:

on the web at java.sun.com
in the current JDK 1.6.0_11 on your local Windows J: drive.

AES
Apache Fulucrum
BeeJCE
block cipher modes: ECB vs CBC etc
BouncyCastle
BouncyCastle RSA encryption code example
certificate
cryptography
digest
digital signatures
ecommerce
encryption
IPsec
JCE
JSSE
JSSE: Java Secure Socket Extension
MD5
PCI DSS: credit card security
registration key
RSA
SHA-1
SSH
SSL
Unlimited Strength: Sun add-on for long keys
where to find jars

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