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Security Analysis of Block Cipher MD-64 Suitable for Wireless Sensor Network Environments

무선 센서 네트워크 환경에 적합한 블록 암호 MD-64에 대한 안전성 분석

  • 이창훈 (한신대학교 컴퓨터공학부)
  • Received : 2011.09.28
  • Accepted : 2011.10.30
  • Published : 2011.10.31

Abstract

MD-64 is a 64-bit block cipher suitable for the efficient implementation in hardware environments such as WSN. In this paper, we propose a related-key amplified boomerang attack on the full-round MD-64. The attack on the full-round MD-64 requires $2^{45.5}$ related-key chosen plaintexts and $2^{95}$ MD-64 encryptions. This work is the first known cryptanalytic result on MD-64.

64-비트 블록 암호 MD-64는 WSN과 같은 환경에서 효율적으로 구현이 가능하도록 설계된 블록 암호이다. 본 논문에서는 MD-64의 전체 라운드에 대한 확장된 연관키 부메랑 공격을 제안한다. 본 논문에서 소개하는 공격은 MD-64에 대한 첫 번째 공격이며, $2^{45.5}$개의 연관키 선택 평문을 이용하여 $2^{95}$의 MD-64 암호화 연산을 수행하여 MD-64의 비밀키를 복구한다.

Keywords

Acknowledgement

Supported by : 한신대학교

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