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Core Java™ 2 Volume II - Advanced Features, Seventh Edition by Gary Cornell, Cay S. Horstmann

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Code Signing

One of the most important uses of authentication technology is signing executable programs. If you download a program, you are naturally concerned about damage that a program can do. For example, the program could have been infected by a virus. If you know where the code comes from and that it has not been tampered with since it left its origin, then your comfort level will be a lot higher than without this knowledge. In fact, if the program was also written in the Java programming language, you can then use this information to make a rational decision about what privileges you will allow that program to have. You might want it to run just in a sandbox as a regular applet, or you might want to grant it a different set of rights and ...

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