Cryptanalysis of a SIP authentication scheme

Authors:
Fuwen Liu;Hartmut Koenig
Affiliations:
Brandenburg University of Technology Cottbus, Department of Computer Science, Cottbus, Germany;Brandenburg University of Technology Cottbus, Department of Computer Science, Cottbus, Germany
Venue:
CMS'11 Proceedings of the 12th IFIP TC 6/TC 11 international conference on Communications and multimedia security
Year:
2011

Citing 5
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Abstract

SIP (Session Initiation Protocol) is becoming the mostly deployed signaling protocol for VoIP (Voice over IP). Security is of utmost importance for its usage due to the open architecture of the Internet. Recently, Yoon et al. proposed a SIP authentication scheme based on elliptic curve cryptography (ECC) that claimed to provide higher security than other schemes. However, as demonstrated in this paper, it is still vulnerable to off-line dictionary and partition attacks.