Open AccessJournal Article
Security analysis of SHA-256 and sisters
Henri Gilbert,Helena Handschuh +1 more
TLDR
In this article, the security of SHA-256, SHA-384 and SHA-512 against collision attacks was studied. But the authors concluded that neither Chabaud and Joux's attack, nor Dobbertin-style attacks also don't apply on the underlying structure.Abstract:
This paper studies the security of SHA-256, SHA-384 and SHA-512 against collision attacks and provides some insight into the security properties of the basic building blocks of the structure. It is concluded that neither Chabaud and Joux's attack, nor Dobbertin-style attacks apply. Differential and linear attacks also don't apply on the underlying structure. However we show that slightly simplified versions of the hash functions are surprisingly weak : whenever symmetric constants and initialization values are used throughout the computations, and modular additions are replaced by exclusive or operations, symmetric messages hash to symmetric digests. Therefore the complexity of collision search on these modified hash functions potentially becomes as low as one wishes.read more
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Understanding Modern Banking Ledgers Through Blockchain Technologies: Future of Transaction Processing and Smart Contracts on the Internet of Money
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A Technical Approach to the Energy Blockchain in Microgrids
Maria Luisa Di Silvestre,Pierluigi Gallo,Mariano Giuseppe Ippolito,Eleonora Riva Sanseverino,Gaetano Zizzo +4 more
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References
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Journal Article
Differential collisions in SHA-0
Florent Chabaud,Antoine Joux +1 more
TL;DR: In this paper, the authors presented a method for finding collisions in SHA-0 which is related to differential cryptanalysis of block ciphers and obtained a theoretical attack on the compression function SHA-O with complexity 2 61, which is thus better than the birthday paradox attack.
Journal ArticleDOI
Cryptanalysis of MD4
TL;DR: The methods developed to attack RIPEMD can be modified and supplemented such that it is possible to break the full MD4, while previously only partial attacks were known.
Book ChapterDOI
On the need for multipermutations: Cryptanalysis of MD4 and SAFER
TL;DR: It is argued that boxes which fail to be multipermutations can open the way to unsuspected attacks.
Book
Integrity primitives for secure information systems : final report of RACE Integrity Primitives Evaluation RIPE-RACE 1040
Antoon Bosselaers,Bart Preneel +1 more
TL;DR: The MDC-4, RIPEMD, RIPE-MAC, IBC-hash, SKID, RSA, COMSET, and RSA key generation guidelines for arithmetic computation are described.
Book ChapterDOI
An Attack on the Last Two Rounds of MD4
Bert den Boer,Antoon Bosselaers +1 more
TL;DR: It is shown that if the three round MD4 algorithm is stripped of its first round, it is possible to find for a given (initial) input value two different messages hashing to the same output.