Title: New Weak-Key Classes of IDEA
Authors: Biryukov, Alex
Nakahara, Jorge
Preneel, Bart
Vandewalle, Joos
Issue Date: 2002
Publisher: Springer-Verlag
Host Document: Lecture Notes in Computer Science vol:2513 pages:315-326
Conference: ICICS 2002 date:December 09-12, 2002
Abstract: This paper presents a large collection of new weak-key classes for the IDEA cipher. The classes presented in this paper contain 2(53) -2(64) weak keys (as compared with 2(51) differential weak keys presented by Daemen at CRYPTO'93 and 2(63) differential-linear weak-keys presented by Hawkes at EUROCRYPT'98). The novelty of our approach is in the use of boomerang distinguishers for the weak-key class membership test. We also show large weak-key classes for reduced-round versions of IDEA.
ISSN: 0302-9743
Publication status: published
KU Leuven publication type: IC
Appears in Collections:ESAT - STADIUS, Stadius Centre for Dynamical Systems, Signal Processing and Data Analytics
Electrical Engineering - miscellaneous

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