Abstract

A type flaw attack on a security protocol is an attack where a field that was originally intended to have one type is subsequently interpreted as having another type. In the paper, we describe some typical examples of type flaw attack and give a type flaw attack that was found on the GDOI protocol. We then analyze the limitations of recent tagging technique of preventing type flaw attack. Finally, a method against type flaw attack by checking the length of message is proposed.

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