* A. Biryukov and D. Wagner, Advanced Slide Attacks, Eurocrypt 2000, Springer-Verlag (2000), pp.
* Phillip Rogaway, The security of DESX (PostScript)* A. Biryukov and D. Wagner, Advanced Slide Attacks, Eurocrypt 2000, Springer-Verlag (2000), pp.589-606