Security and the class verifier

A look at the role played by the class verifier in the JVM's overall security model

This month's article continues the discussion of Java's security model begun in August's "Under the Hood." In that article, I gave a general overview of the security mechanisms built into the Java virtual machine (JVM). I also looked closely at one aspect of those security mechanisms: the JVM's built-in safety features. In September's "Under the Hood," I examined the class loader architecture, another aspect of the JVM's built-in security mechanisms. This month I'll focus on the third prong of the JVM's security strategy: the class verifier.

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