Different applications are therefore separated from each other by an applet firewall which restricts and checks access of data elements of one applet to another. Applet firewall Unlike other Java VMs, a Java Card VM usually manages several applications, each one controlling sensitive data. Security is determined by various aspects of this technology:ĭata encapsulation Data is stored within the application, and Java Card applications are executed in an isolated environment (the Java Card VM), separate from the underlying operating system and hardware.
Java Card technology was originally developed for the purpose of securing sensitive information stored on smart cards. for communication protocols or cryptographic algorithms). Portability remains mitigated by issues of memory size, performance, and runtime support (e.g.
As in Java, this is accomplished using the combination of a virtual machine (the Java Card Virtual Machine), and a well-defined runtime library, which largely abstracts the applet from differences between smart cards. Java Card aims at defining a standard smart card computing environment allowing the same Java Card applet to run on different smart cards, much like a Java applet runs on different computers.
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