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Journal of Inforamtion Science and Engineering, Vol. 16, No. 6, pp. 857-861 (November 2000)

Dynamic GOST

Yi-Shiung Yeh, Chu-Hsing Lin* and Chan-Chi Wang
Institute of Computer Science and Information Engineering
National Chiao Tung University
Hsinchu, Taiwan 300, R.O.C.
*Department of Computer Science and Information Engineering
Tunghai University
Taichung, Taiwan 407, R.O.C.

GOST is a block algorithm which was adopted as a standard by the former Soviet Union. Because it keeps a lot of secret information, including S-boxes, the algorithm is secure and easy to understand. In this article, we propose a variant of GOST, called dynamic GOST, in which permutations are applied. With the permutation information securely kept, the new version of GOST is more secure and better to withstand differential and linear attacks.

Keywords: GOST, block cipher, S-boxes, DES, subkey generation, cryptanalysis, differential attack, linear attack, random permutation

Full Text () Retrieve PDF document (200011_05.pdf )

Received September 2, 1998; revised November 30, 1998; accepted March 18, 1999.
Communicated by Chi Sung Laih.