Many of today's wireless devices apply the Wireless Application Protocol (WAP). To fully implement the security features that WAP defines, a Wireless Identity Module (WIM) is required within the client device. This paper describes a prototype WIM implementation running on a Java-based smart card and presents an evaluation of this WIM application focusing on its resource consumption and the execution speed of the services it provides. The results show that the Java-based WIM performs well for both criteria and can have a positive impact on the transportlayer and application-layer security provided through a WAP device
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