Friday, 24 February 2012

Cryptographic primitives based on symmetric ciphers

Symmetric ciphers are generally acclimated

to accomplish added cryptographic primitives than aloof encryption

.

Encrypting a bulletin does not agreement that this bulletin is not afflicted while encrypted. Hence generally a bulletin affidavit cipher is added to a ciphertext to ensure that changes to the ciphertext will be acclaimed by the receiver. Bulletin affidavit codes can be complete from symmetric ciphers (e.g. CBC-MAC

).

However, symmetric ciphers additionally can be

acclimated for non-repudiation purposes by ISO 13888-2 standard.

Another appliance is to body assortment functions from block ciphers. See one-way compression action for descriptions of several such methods.

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