[Resource Topic] 2010/580: The Cube Attack on Stream Cipher Trivium and Quadraticity Tests

Welcome to the resource topic for 2010/580

Title:
The Cube Attack on Stream Cipher Trivium and Quadraticity Tests

Authors: Piotr Mroczkowski, Janusz Szmidt

Abstract:

In 2008 I. Dinur and A. Shamir presented a new type of algebraic attack on symmetric ciphers named cube attack. The method has been applied to reduced variants of stream ciphers Trivium and Grain- 128, reduced variants of the block ciphers Serpent and CTC and to a reduced version of the keyed hash function MD6. Independently a very similar attack named AIDA was introduced by M. Vielhaber. In this paper we develop quadraticity tests within the cube attack and apply them to a variant of stream cipher Trivium reduced to 709 initialization rounds. Using this method we obtain the full 80-bit secret key. In this way it eliminates the stage of brute force search of some secret key bits which occured in previous cube attacks.

ePrint: https://eprint.iacr.org/2010/580

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