Parsing ambiguities in authentication and key establishment protocols Online publication date: Wed, 31-Mar-2010
by Liqun Chen, Chris J. Mitchell
International Journal of Electronic Security and Digital Forensics (IJESDF), Vol. 3, No. 1, 2010
Abstract: A new class of attacks against authentication and authenticated key establishment protocols is described, which we call parsing ambiguity attacks. If appropriate precautions are not deployed, these attacks apply to a very wide range of such protocols, including those specified in a number of international standards. Three example attacks are described in detail, and possible generalisations are also outlined. Finally, possible countermeasures are given, as are recommendations for modifications to the relevant standards.
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