Skip to main content

Cryptanalysis of full sprout

19Citations
Citations of this article
25Readers
Mendeley users who have this article in their library.

This artice is free to access.

Abstract

A new method for reducing the internal state size of stream cipher registers has been proposed in FSE 2015, allowing to reduce the area in hardware implementations. Along with it, an instantiated proposal of a cipher was also proposed: Sprout. In this paper, we analyze the security of Sprout, and we propose an attack that recovers the whole key more than 210 times faster than exhaustive search and has very low data complexity. The attack can be seen as a divide-and-conquer evolved technique, that exploits the non-linear influence of the key bits on the update function. We have implemented the attack on a toy version of Sprout, that conserves the main properties exploited in the attack. The attack completely matches the expected complexities predicted by our theoretical cryptanalysis, which proves its validity. We believe that our attack shows that a more careful analysis should be done in order to instantiate the proposed design method.

Cite

CITATION STYLE

APA

Lallemand, V., & Naya-Plasencia, M. (2015). Cryptanalysis of full sprout. In Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics) (Vol. 9215, pp. 663–682). Springer Verlag. https://doi.org/10.1007/978-3-662-47989-6_32

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free