Hash and Encryption

Hash
Hash is 1 way which cannot be decrypted.
Hash method:
1. MD5
2. SHA1

http://dotnetpulse.blogspot.com/2007/12/sha1-hash-calculation-in-c.html

http://www.obviex.com/samples/hash.aspx

http://stackoverflow.com/questions/1454747/how-to-decrypt-md5-or-sha1-is-it-possible

Encryption
Encryption is 2 way and can be decrypted.
Encryption method:
1. TripleDES
2. Rijndael

Rainbow Table
http://en.wikipedia.org/wiki/Rainbow_table

Salt
http://en.wikipedia.org/wiki/Salt_%28cryptography%29