Labels:bulletin board | earth | person | reckoner | sky OCR: The Data Encryption Standard In 1977 the National Bureau of Standards announced Data Encryption Standard to be used in unclassified U Government applications The DES enciph ners 64 -bit blocks of data with 56 bit key. The key used by DES is function of all the characters in your password so poob idea to make them long character) when using DES lf a 14 character (56 bit) hexad lecimal key entered it will be used directly This software implementation of the DES runs in Cipher Block Chaining mode (See below) at a rate of about 2.5k per second on Mac Plus/SE and at about 10k per second on Mac 1 Plaintext Cipher Block Chaining Block Ciphers can be made more resistant to cryptanalysis using technique called cipher block chaining. An entire block of enciphered data is exclusive -ored with the nex ...
