Book For Computer Security

Red Book
-RSA Trusted Network – DOD Standard
-Bible for Computer Security
-Every massage is secret that encryption technique
-Use picture format is very strong to sent secret massage- terdpt ruang di dalam saiz picture tersebut.
Cth: saiz picture 100 KB tp sebenarnya ada ruang lg.

Julius Caesar ( tokoh tertua dlm secret massage) (3 step chipping)
http://en.wikipedia.org/wiki/Caesar_cipher

Plain : ABCDEFGHIJKLMNOPQRSTUVWXYZ
Cipher: DEFGHIJKLMNOPQRSTUVWXYZABC

Example: -COMPUTER
-----------FRPSXWHU