Cipher : Java Glossary

Cipher

Here’s how to encrypt and decrypt a message using CipherOutputStream/ CipherInputStream The methods used are all part of Sun’s JCE (Java Cryptography Extension). 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 (Advanced Encryption Standard) Encryption

Requires

RSA (Rivest, Shamir and Adelman) 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 (Password Based Encryption) 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.

Oracle’s Javadoc on Cipher class : available:

on the web at Oracle.com
in the current JDK 1.7.0_04 or in the old JDK 1.6.0_32 on your local Windows J: drive.

Oracle’s Javadoc on CipherInputStream class : available:

on the web at Oracle.com
in the current JDK 1.7.0_04 or in the old JDK 1.6.0_32 on your local Windows J: drive.

Oracle’s Javadoc on CipherOutputStream class : available:

on the web at Oracle.com
in the current JDK 1.7.0_04 or in the old JDK 1.6.0_32 on your local Windows J: drive.

Oracle’s Javadoc on KeyGenerator class : available:

on the web at Oracle.com
in the current JDK 1.7.0_04 or in the old JDK 1.6.0_32 on your local Windows J: drive.

Oracle’s Javadoc on SecretKey class : available:

on the web at Oracle.com
in the current JDK 1.7.0_04 or in the old JDK 1.6.0_32 on your local Windows J: drive.

Oracle’s Javadoc on SecretKeySpec class : available:

on the web at Oracle.com
in the current JDK 1.7.0_04 or in the old JDK 1.6.0_32 on your local Windows J: drive.

Oracle’s Technote Guide on cryptography algorithm names : available:

on the web at Oracle.com
in the current JDK 1.7.0_04 on your local Windows J: drive.

AES
Apache Fulucrum
BeeJCE
block cipher modes: ECB vs CBC etc
BouncyCastle
certificate
cryptography
digest
digital signatures
ecommerce
encryption
IPsec
JCE
JSSE
MD5
PCI DSS: credit card security
registration key
RSA
SHA-1
SSH
SSL
where to find jars

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