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Freestyle, a randomized version of ChaCha for resisting offline brute-force and dictionary attacks
Brute-force resistant ciphers Dictionary based attacks Key-guessing penalty
2018/11/29
This paper introduces Freestyle, a randomized, and variable round version of the ChaCha cipher. Freestyle demonstrates the concept of hash based halting condition, where a decryption attempt with an i...
The inclusion of ChaCha20 and Poly1305 into the list of supported ciphers in TLS 1.3 necessitates a security evaluation of those ciphers with all the state-of-the-art tools and innovative cryptanalysi...
Bricklayer Attack: A Side-Channel Analysis on the ChaCha Quarter Round
ChaCha Quarter Round constrainted platforms
2017/10/25
ChaCha is a family of stream ciphers that are very efficient on constrainted platforms. In this paper, we present electromagnetic side-channel analyses for two different software implementations of Ch...
Significantly Improved Multi-bit Differentials for Reduced Round Salsa and ChaCha
Stream Cipher ChaCha Salsa
2016/12/7
ChaCha and Salsa are two software oriented stream ciphers that have attracted serious attention in academic as well as commercial domain. The most important cryptanalysis of reduced versions of these ...
Differential Cryptanalysis of Salsa and ChaCha -- An Evaluation with a Hybrid Model
ARX Cipher Stream Cipher ChaCha, Salsa
2016/4/15
While \textsf{Salsa} and \textsf{ChaCha} are well known software oriented stream ciphers, since the work of Aumasson et al in FSE 2008 there aren't many significant results against them. The basic mod...
Recently, ChaCha20 (the stream cipher ChaCha with 20 rounds) is in the process of
being a standard and thus it attracts serious interest in cryptanalysis. The most significant effort
to analyse Sals...
This paper describes software optimization for the stream Cipher ChaCha. We leverage the wide vectorization capabilities of the new AVX2 architecture, to speed up ChaCha encryption (and decryption) on...
Compact Hardware Implementations of ChaCha, BLAKE, Threefish, and Skein on FPGA
BLAKE Threefish Skein on FPGA
2013/4/18
The cryptographic hash functions BLAKE and Skein are built from the ChaCha stream cipher and the tweakable Threefish block cipher, respectively. Interestingly enough, they are based on the same arithm...
New Features of Latin Dances:Analysis of Salsa, ChaCha, and Rumba
Latin Dances Salsa ChaCha Rumba
2009/6/2
The stream cipher Salsa20 was introduced by Bernstein in 2005 as a can-
didate in the eSTREAM project, accompanied by the reduced versions Salsa20/8 and
Salsa20/12. ChaCha is a variant of Salsa20 ai...
New Features of Latin Dances:Analysis of Salsa, ChaCha, and Rumba
Latin Dances stream cipher Salsa20 ChaCha
2008/5/20
The stream cipher Salsa20 was introduced by Bernstein in 2005 as a can-
didate in the eSTREAM project, accompanied by the reduced versions Salsa20/8 and
Salsa20/12. ChaCha is a variant of Salsa20 ai...
