Improved Related-key Attacks on DESX and DESX+
Raphaël C.‐W. Phan, Adi Shamir · Cryptologia · 2008
In this article, we present improved related-key attacks on the original DESX, and DESX+, a variant of the DESX with its pre- and post-whitening XOR operations replaced with addition modulo 264. Compared to previous results, our attack on DESX has reduced text complexity, while our best attack on DESX+ eliminates the memory requirements at the same processing complexity.