Cipher : Java Glossary

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Cipher
Here’s how to encrypt and decrypt a message using CipherOutputStream/ CipherInputStream The methods used are all part of Oracle’s JCE (Java Cryptography Extension). Oracle’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:
Oracle’s Javadoc on CipherInputStream class : available:
Oracle’s Javadoc on CipherOutputStream class : available:
Oracle’s Javadoc on KeyGenerator class : available:
Oracle’s Javadoc on SecretKey class : available:
Oracle’s Javadoc on SecretKeySpec class : available:
Oracle’s Java 1.8 documentation on : cryptography algorithm names

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