Improved Related-Cipher Attack on Salsa20 Stream Cipher
Improved Related-Cipher Attack on Salsa20 Stream Cipher
复制标题
改进了对 Salsa20 流密码的相关密码攻击
DOI:
10.1109/access.2019.2892647
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发表时间:
2019
期刊:
影响因子:
3.9
通讯作者:
Ding Lin
中科院分区:
文献类型:
--
作者:
Ding Lin
The Salsa20 stream cipher was designed by Bernstein in 2005 as a candidate for eSTREAM and Salsa20/12 was accepted in the eSTREAM software portfolio in 2008. In this paper, we present an improved related-cipher attack on Salsa20. If a secret key is used in Salsa20/12 and Salsa20/8 with 2 different <inline-formula> <tex-math notation="LaTeX">$IVs$ </tex-math></inline-formula>, we can recover the 256-bit secret key with time complexity of about 2<sup>193.58</sup>, which improves the existing attack by a factor of 2<sup>30.42</sup>. To the best of our knowledge, this is the best related-cipher attack on Salsa20 so far. Furthermore, we build a binary integer optimization model to search for the best related-cipher attack on Salsa20. The results show that our attack is the best related-cipher attack on Salsa20 in this model.
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DOI:
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期刊:
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影响因子:
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期刊:
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