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Erschienen in:
1997 | OriginalPaper | Buchkapitel
Two Attacks on Reduced IDEA
Extended Abstract
verfasst von : Johan Borst, Lars R. Knudsen, Vincent Rijmen
Erschienen in: Advances in Cryptology — EUROCRYPT ’97
Verlag: Springer Berlin Heidelberg
Enthalten in: Professional Book Archive
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In 1991 Lai, Massey and Murphy introduced the IPES (Improved Proposed Encryption Standard), later renamed IDEA (International Data Encryption Algorithm). In this paper we give two new attacks on a reduced number of rounds of IDEA. A truncated differential attack on IDEA reduced to 3.5 rounds and a differential-linear attack on IDEA reduced to 3 rounds. The truncated differential attack contains a novel method for determining the secret key.