APPLIED CRYPTOGRAPHY, SECOND EDITION: Protocols, Algorithms, and Source Code in C

chapter 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25

Cryptanalysis of GOST

These are the major differences between DES and GOST.

— DES has a complicated procedure for generating the subkeys from the keys. GOST has a very simple procedure.

— DES has a 56-bit key; GOST has a 256-bit key. If you add in the secret S-box permutations, GOST has a total of about 610 bits of secret information.

Table 14.2 GOST S-Boxes

	*S-box 1:*
4	10	9	2	13	8	0	14	6	11	1	12	7	15	5	3
	*S-box 2:*
14	11	4	12	6	13	15	10	2	3	8	1	0	7	5	9
	*S-box 3:*
5	8	1	13	10	3	4	2	14	15	12	7	6	0	9	11
	*S-box 4:*
7	13	10	1	0	8	9	15	14	4	6	12	11	2	5	3
	*S-box 5:*
6	12	7	1	5	15	13	8	4	10	9	14	0	3	11	2
	*S-box 6:*
4	11	10	0	7	2	1	13	3	6	8	5	9	12	15	14
	*S-box 7:*
13	11	4	1	3	15	5	9	0	10	14	7	6	8	2	12
	*S-box 8:*
1	15	13	0	5	7	10	4	9	2	3	14	6	11	8	12

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