KIPS Transactions on Computer and Communication Systems (정보처리학회논문지:컴퓨터 및 통신 시스템)

Korea Information Processing Society (한국정보처리학회)
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Security Analysis on Block Cipher XSB

블록 암호 XSB에 대한 안전성 분석

  • 이창훈 (서울과학기술대학교 컴퓨터공학과)
  • Received : 2013.02.26
  • Accepted : 2013.04.26
  • Published : 2013.07.31
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Abstract

256-bit block cipher XSB(eXtended Spn Block cipher) was proposed in 2012 and has a symmetric strucrure in encryption and decryption process. In this paper, we propose a differential fault analysis on XSB. Based on a random byte fault model, our attack can recover the secret key of XSB by using only two random byte fault injection. This result is the first known cryptanalytic result on the target algorithm.

2012년에 제안된 256-비트 블록 암호 XSB(eXtended Spn Block cipher)는 암호화 과정과 복호화 과정이 동일하게 설계된 블록 암호 알고리즘이다. 본 논문에서는 XSB에 대한 차분 오류 공격을 제안한다. 랜덤 바이트 오류 주입 가정에 기반을 둔 이 공격은 2개의 랜덤 바이트 오류를 이용하여, XSB의 256-비트 비밀키를 복구한다. 본 논문의 공격 결과는 XSB에 대한 첫 번째 분석 결과이다.

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References

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