System Hacking,Cryptography & Bruteforce techniques

1. Kryptos - The art of hiding data
2. Encoding - Just another form of representing data - base64,hex etc
3. Hash - one way function without secret key producing output of specific byte length, hard to reverse - MD5,SHA1 etc
4. Encryption - two way function, generally takes a password to produce encrypted text. Can be decrypted if password is known/brute-force. - RSA,AES etc
5. Example of Hashes.
6. Reference for bruteforce attacks.