#xor–encrypt–xor

Xor–encrypt–xor

Block cypher operating mode

The xor–encrypt–xor (XEX) is a (tweakable) mode of operation of a block cipher. In tweaked-codebook mode with ciphertext stealing, it is one of the more popular modes of operation for whole-disk encryption. XEX is also a common form of key whitening, and part of some smart card proposals.

Wed 19th

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