International Association for Cryptologic Research

International Association
for Cryptologic Research

IACR News item: 27 February 2015

Daniel J. Bernstein, Andreas Hülsing, Tanja Lange, Ruben Niederhagen
ePrint Report ePrint Report
A 25-gigabyte \"point obfuscation\" challenge \"using security parameter 60\" was announced at the Crypto 2015 rump session; \"point obfuscation\" is another name for password hashing. This paper shows that the particular matrix-multiplication hash function used in the challenge is much less secure than previous password-hashing functions are believed to be. This paper\'s attack algorithm broke the challenge in just 19 minutes using a cluster of 21 PCs.

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