A Study on a Variable P box Generation Using a DES Key Expansion


The KIPS Transactions:PartC, Vol. 18, No. 5, pp. 287-292, Oct. 2011
10.3745/KIPSTC.2011.18.5.287,   PDF Download:

Abstract

Using an expanded DES key, we suggest a block cipher algorithm to generate and to use a variable P box. We also present an efficient way for the implementation of variable P box at each round. Using counter examples on Differential Cryptanalysis(DC) and Linear Cryptanalysis(LC), we show that the suggested algorithm is strong enough to overcome those attacks. Compared with the real key bits of triple DES(3DES), the new algorithm is much safer in the points of the exhaustive attack. The results of computer simulations show that the new algorithm is almost 3 times faster than 3DES regarding the cipher process time.


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Cite this article
[IEEE Style]
J. Lee, "A Study on a Variable P box Generation Using a DES Key Expansion," The KIPS Transactions:PartC, vol. 18, no. 5, pp. 287-292, 2011. DOI: 10.3745/KIPSTC.2011.18.5.287.

[ACM Style]
Jun Lee. 2011. A Study on a Variable P box Generation Using a DES Key Expansion. The KIPS Transactions:PartC, 18, 5, (2011), 287-292. DOI: 10.3745/KIPSTC.2011.18.5.287.