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Chaffing and winnowing

From Wikipedia, the free encyclopedia.

Chaffing and winnowing is a cryptography technique, though as it works by hiding which part of a transmission is the message, it is classified as steganography. A message is broken into blocks, and each one is transmitted with a message authentication code, interspersed at random with other similar blocks, called chaff. The recipient checks the MAC of each block; those that do not match are chaff, and are winnowed out.

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