International Conference on Electronics, Information and Communication Engineering (EICE 2012)
136 Weakness of Secure Electronic Ticket Scheme for Its
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Matsuo and Ogata proposed an electronic ticketing based on public key scheme for intelligent transport system in 2003. Later, Hsu pointed out that Matsuo-Ogata' scheme is insecure, and also gave an improvement in 2006. In this paper, we will propose an forgery attack based on Hsu's scheme and prove his method also insecure.