Efficient Instantiations of Tweakable Blockciphers and Refinements to Modes OCB and PMAC

ADVANCES IN CRYPTOLOGY - ASIACRYPT 2004, PROCEEDINGS, (2004): 16-31

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Abstract

We describe highly efficient constructions, XE and XEX, that turn a blockcipher (E) over tilde: K x {0, 1}(n) --> {0, 1}(n) into a tweakable blockcipher (E) over tilde $: K x T x {0, 1}(n -->){0, 1}(n) having tweak space T = {0, 1}(n) x I where I is a set of tuples of integers such as I = [1.. 2(n/2)] x [0..10]. When tweak T is obtained f...More

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