Chapter 24: Selecting a Cryptographic System
Marie A. Wright
CRYPTOGRAPHY IS CONCERNED WITH THE DESIGN AND USE OF ENCRYPTION SYSTEMS, AND ITS PRIMARY OBJECTIVE IS TO ENSURE THE PRIVACY AND AUTHENTICITY OF DATA. Encryption provides privacy by transforming data into an unintelligible form through the use of a key, which is a symbol or group of symbols that controls the encryption or decryption processes.
Some cryptographic systems allow the same key to be used for both encryption and decryption. These private-key systems are so named because the disclosure of the key to anyone but the sender and the receiver will compromise the integrity of the transmitted data. Other cryptographic systems use different keys to control the encryption and decryption ...
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