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Core Java® Volume II—Advanced Features, Ninth Edition by Gary Cornell, Cay S. Horstmann

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9.6.1. JAR File Signing

In this section, we’ll show you how to sign applets and Web Start applications for use with the Java Plug-in software. There are two scenarios:

• Delivery in an intranet

• Delivery over the public Internet

In the first scenario, a system administrator installs policy files and certificates on local machines. Whenever the Java Plug-in tool loads signed code, it consults the policy file for the permissions and the keystore for signatures. Installing the policies and certificates is straightforward and can be done once per desktop. End users can then run signed corporate code outside the sandbox. Whenever a new program is created or an existing one is updated, it must be signed and deployed on the web server. However, no ...

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