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Paper 2001/021

The Rectangle Attack - Rectangling the Serpent

Biham Eli, Orr Dunkelman, Nathan Keller

Abstract

Serpent is one of the 5 AES finalists. The best attack published so far analyzes up to 9 rounds. In this paper we present attacks on 7-round, 8-round, and 10-round variants of Serpent. We attack 7-round variant of Serpent with all key lengths, and 8- and 10-round variants wih 256-bit keys. The 10-roun attack on the 256-bit keys variants is the best published attack on the cipher. The attack enhances the amplified boomerang attack and uses better differentials. We also present the best 3-round, 4-round, 5-round and 6-round differential characteristics of Serpent.

Metadata
Available format(s)
PS
Category
Secret-key cryptography
Publication info
Published elsewhere. Will be presented in EuroCrypt 2001
Keywords
SerpentRectangle AttackCryptanalysisBoomerang AttackAmplified Boomerang Attack
Contact author(s)
orrd @ cs technion ac il
History
2001-03-06: received
Short URL
https://ia.cr/2001/021
License
Creative Commons Attribution
CC BY
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