Authors: Mihaljević, Miodrag J. 
Imai, Hideki
Affiliations: Mathematical Institute of the Serbian Academy of Sciences and Arts 
Title: Cryptanalysis of TOYOCRYPT-HS1 stream cipher
Journal: IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
Volume: E85-A
Issue: 1
First page: 66
Last page: 73
Issue Date: 1-Jan-2002
Rank: M23
ISSN: 0916-8508
Abstract: 
The security evaluation of TOYOCRYPT-HRI and TOYOCRIPT-HSI stream ciphers was presented. A technique for the TOYOCRYPT-HRI was developed based on its algebraic analysis and the employment of time-memory-data trade-off approach. The dimension of the effective secret-key was only 96 bits, although the secret key consisted of 128 bits.
Keywords: Cryptanalysis | Keystream generators | Linear feedback shift registers | Nonlinear filter | Stream ciphers
Publisher: Institute of Electronics, Information and Communication, Engineers, IEICE

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