Abstract
SIM as a security token is increasingly being used to secure mobile phone applications. Sensitive information such as PIN, security keys, etc are stored on the SIM card. To utilise the SIM functionalities, it is imperative that mobile phone applications interact with applets available on the SIM. The security features for mobile applications operating within the J2ME ecosystem are provisioned by SATSA API Framework. It allows support for cryptography, digital signatures, user credential management, communication with a smart card, and remote method invocation. The SATSA APDU Communication API provides support for mobile phone applications to interact with Java Card applets residing on a smart card, over the ISO7816 interface. This chapter provides a practical example of a mobile phone application implementing SATSA API. A MIDP 2.0 application or MIDlet that utilises the APDU package within SATSA API and a Java Card applet were developed. The MIDlet and applet were tested to work with each other on a PC-based development environment. The MIDlet was tested on Wireless Toolkit Emulator and the Java Card applet was tested on Java Card Platform Simulator. Freely available tools were used to create the above mentioned practical demonstrators.
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