大象LFSR的盲区通道

SECRYPT ... : proceedings of the International Conference on Security and Cryptography. International Conference on Security and Cryptography Pub Date : 2022-01-01 DOI:10.5220/0011135300003283

Awaleh Houssein Meraneh, Christophe Clavier, Hélène Le Bouder, Julien Maillard, Gaël Thomas

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引用次数: 3

摘要

Elephant是NIST轻量级密码学竞赛的决赛选手。本文首次从理论上提出了针对大象认证加密算法的盲侧信道攻击。更准确地说，我们的目标是内部使用的基于lfsr的计数器。lfsr是对称密码学中使用的经典函数。在Elephant的情况下，检索LFSR的初始状态等同于检索加密密钥。本文最后研究了不同的方法来调整大象的设计，以减轻我们的攻击。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Blind Side Channel on the Elephant LFSR

: Elephant is a ﬁnalist to the NIST lightweight cryptography competition. In this paper, the ﬁrst theoretical blind side channel attack against the authenticated encryption algorithm Elephant is presented. More precisely, we are targetting the LFSR-based counter used internally. LFSRs are classic functions used in symmetric cryptography. In the case of Elephant, retrieving the initial state of the LFSR is equivalent to retrieving the encryption key. The paper ends by the study of different ways to tweak the design of Elephant to mitigate our attack.

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SECRYPT ... : proceedings of the International Conference on Security and Cryptography. International Conference on Security and Cryptography

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