Cryptanalysis of hash-based tamed transformation and minus signature scheme
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Publication Details
Output type: Book
Author list: Nie X., Xu Z., Buchmann J.
Publication year: 2013
ISBN: 9783642386152
URL: http://api.elsevier.com/content/abstract/scopus_id:84884487604
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Open access status: closed
Abstract
In 2011, wang et al. proposed a security enhancement method of Multivariate Public Key Cryptosystems (MPKCs), named Extended Multivariate public key Cryptosystems (EMC). They introduced more variables in an original MPKC by a so-called Hash-based Tamed (HT) transformation in order to resist existing attack on the original MPKC. They proposed Hash-based Tamed Transformation and Minus (HTTM) signature scheme which combined EMC method with minus method. Through our analysis, the HTTM is not secure as they declared. If we can forge a valid signature of the original MPKC-minus signature scheme, we could forge a valid signature of HTTM scheme successfully. © 2013 Springer-Verlag.
Keywords
Algebraic attack, Hash-based tamed transformation, Minus method, Multivariate public key cryptosystem
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