Spectr-H64

In cryptography, Spectr-H64 is a block cipher designed in 2001 by N. D. Goots, A. A. Moldovyan and N. A. Moldovyan. It relies heavily on the permutation of individual bits, so is much better suited to implementation in hardware than in software.

Spectr-H64
General
DesignersN.D. Goots, A.A. Moldovyan and N.A. Moldovyan
First published2001
SuccessorsCIKS-1
Cipher detail
Key sizes256 bits
Block sizes64 bits
StructureFeistel-like network
Rounds12
Best public cryptanalysis
Slide attack using 217 chosen plaintexts

The algorithm has a block size of 64 bits and key size of 256 bits. It uses a 12-round structure in which half of the block determines the transformation of the other half in each round, similar to a Feistel cipher or RC5. This same basic design was repeated in its successor, CIKS-1.

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