Tweakable Enciphering Modes for Sector-Level Encryption ( Extended Abstract )


We describe block-cipher modes of operation that turn an n-bit block cipher into a tweakable enciphering scheme that acts on sectors of mn bits, where m ≥ 2. When the underlying block cipher is secure in the sense of a strong pseudorandom permutation (PRP) our schemes are secure in the sense of variableinput-length, tweakable, strong PRP. Such an object can… (More)

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