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CHAPTER
11
Applet Installation and Deletion
Applet installation and deletion on smart cards using Java Card technology is a
complex topic. The design of the Application Programming Interface, Java Card Platform,
Version 2.2.2 is intended to give Java Card RE implementers as much freedom as
possible in their implementations. However, some basic common specifications are
required to allow Java Card applets to be installed and deleted without knowing the
implementation details of a particular installer or deletion manager.
This specification defines the concepts of an Installer and an Applet Deletion
Manager and specifies minimal requirements to achieve interoperability across a
wide range of possible Installer implementations.
The Applet Installer is an optional part of the Runtime Environment Specification, Java
Card Platform, Version 3.0, Classic Edition. An implementation of the Java Card RE
does not necessarily need to include a post-issuance Installer. However, if
implemented, the installer is required to support the behavior specified in this
chapter.
If the implementation of the Java Card RE includes a post-issuance Installer, an
Applet Deletion Manager that supports the behavior specified in this chapter is also
required.
Section 11.1, “The Installer” on page 11-2 describes CAP file loading and linking. For
more information on CAP files, see the Virtual Machine Specification, Java Card
Platform, Version 3.0, Classic Edition. Section 11.2, “The Newly Installed Applet” on
page 11-5 describes applet installation. Even though the loading and linking
operations are described together with the installation operations, there is no
requirement that they be performed together during the same card session for the
following reasons:
■
Applet packages in ROM are preloaded and prelinked at card issuance, but
instances of applets from these packages may be installed by the Installer during
a card session.
■
Applet packages may be downloaded and linked by the Installer during one card
session, but applet instances from these packages may be installed by the Installer
during a different card session.
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