Basic HTML version of Foils prepared April 7 1998

Foil 53 Sandbox mechanism

From Basic Principles of Java and Internet Security CPS616 Web Technologies -- Spring 98. by Geoffrey C. Fox


1 This addresses security of the client machine once an applet has been downloaded and includes processing of security mechanisms such as authentication certificates
2 There are three parts of the Java Security model:
  • Byte Code Verifier: checks that the downloaded .class files obey the rules of the Java Virtual Machine
  • Class Loader: makes certain that Java classes have a security structure that prevents outside applets contaminating built in runtime.
  • Security Manager: implements overall policy which depends on particular browser and includes privileges open to applets and processing of authentication mechanisms
  • Note first two parts can have bugs; last part can have both bugs and ill advised policies!

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