Related-key and meet-in-the-middle attacks on Triple-DES and DES-EXE

Authors:
Jaemin Choi;Jongsung Kim;Jaechul Sung;Sangjin Lee;Jongin Lim
Affiliations:
Center for Information Security Technologies(CIST), Korea University, Seoul, Korea;Center for Information Security Technologies(CIST), Korea University, Seoul, Korea;Department of Mathematics, University of Seoul, Seoul, Korea;Center for Information Security Technologies(CIST), Korea University, Seoul, Korea;Center for Information Security Technologies(CIST), Korea University, Seoul, Korea
Venue:
ICCSA'05 Proceedings of the 2005 international conference on Computational Science and Its Applications - Volume Part II
Year:
2005

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Abstract

Recently, at CT-RSA 2004, Phan [14] suggested the related-key attack on three-key triple-DES under some chosen related-key condition. The attacks on three-key triple-DES require known plaintext and ciphertext queries under a chosen related-key condition. He also presented related-key attacks on two-key triple-DES and DES-EXE, which require known plaintext and adaptively chosen ciphertext queries under some related-key conditions. In this paper, we extended the previous attacks on the triple-DES and DES-EXE with various related-key conditions. Also we suggest a meet-in-the-middle attack on DES-EXE.