Improved Related-Cipher Attack on Salsa20 Stream Cipher

Autor: Lin Ding
Jazyk: angličtina
Rok vydání: 2019
Předmět:
Zdroj: IEEE Access, Vol 7, Pp 30197-30202 (2019)
ISSN: 2169-3536
Popis: 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 IVs, we can recover the 256-bit secret key with time complexity of about 2193.58, which improves the existing attack by a factor of 230.42. 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.
Databáze: OpenAIRE
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