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http://www.javapractices.com/topic/TopicAction.do?Id=216 Passwords never in clear text
http://en.wikipedia.org/wiki/Salt_(cryptography) Salt (cryptography)
http://en.wikipedia.org/wiki/Cryptographic_hash_function Cryptographic hash function
...
http://www.javapractices.com/topic/TopicAction.do?Id=216 Passwords never in clear text
http://en.wikipedia.org/wiki/Salt_(cryptography) Salt (cryptography)
http://en.wikipedia.org/wiki/Cryptographic_hash_function Cryptographic hash function