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Design of Modified MDS Block for Performance Improvement of Twofish Cryptographic Algorithm

  • Journal of The Korea Society of Computer and Information
  • Abbr : JKSCI
  • 2005, 10(5), pp.109-114
  • Publisher : The Korean Society Of Computer And Information
  • Research Area : Engineering > Computer Science

정우열 1 Lee, Seon-Keun 2

1한려대학교
2원광대학교

Candidate

ABSTRACT

Twofish cryptographic algorithm is concise algorithm itself than Rijndael cryptographic algorithm as AES, and easy of implementation is good, but the processing speed has slow shortcoming. Therefore this paper designed improved MDS block to improve Twofish cryptographic algorithm's speed. Problem of speed decline by a bottle-neck phenomenon of the processing speed existed as block that existing MDS block occupies Twofish cryptosystem's critical path. To reduce multiplication that is used by operator in MDS block this paper removed a bottle-neck phenomenon and low-speed about MDS itself using LUT operation and modulo-2 operation. Twofish cryptosystem including modified MDS block designed by these result confirmed that bring elevation of the processing speed about 10% than existing Twofish cryptosystem.

Citation status

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