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2) A.F Webster and S.E Travares, "On The Design of Sboxes," Queen's university Kingston, Springer- verlag, Canada1998

3) Muhammad Asim, "Efficient and Simple Method for Designing Chaotic S-boxes" Electronic and Telecommunications Research Journal, University of Technology Petronas, Malaysia February 2008.

4) Xinmiao Zhang and Keshab K. Parhi, “On the Optimum Constructions of Composite Field for the AES Algorithm”, IEEE, VOL. 53, NO. 10, OCTOBER 2006

5) F. Fahmy and G. Salama, "A proposal for Keydependant AES, " 3rd International Conference: Sciences of Electronic, Technologies of Information and Telecommunications (SETIT), TUNISIA March 2005.

6) Joan Daemen and Vincent Rijmen.“Two-Round AES Differential”. Cryptology ePrint Archive, Report 2006/039, 2006.