Encryption

Cryptography is not so much about hiding a message, as with steganography, but rather about obfuscating the message so that it cannot be read. In other words, with steganography, the examiner may not even be aware a message is present. With cryptography, it is obvious there is a message present, but the examiner cannot easily decipher the message. The word cryptography is derived from the Greek words kryptós, which means hidden, and gráfo, which means I write. Therefore, cryptography is the study of writing secret messages.

Get System Forensics, Investigation, and Response, 3rd Edition now with the O’Reilly learning platform.

O’Reilly members experience live online training, plus books, videos, and digital content from nearly 200 publishers.