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Trail: Security Features in Java SE: Table of Contents

Security Features Overview

Quick Tour of Controlling Applets

Observe Applet Restrictions
Set up a Policy File to Grant the Required Permission Start Policy Tool Grant the Required Permission Save the Policy File
See the Policy File Effects

Quick Tour of Controlling Applications

Observe Application Freedom
See How to Restrict Applications
Set up the Policy File to Grant the Required Permissions Open the Policy File Grant the Required Permissions Save the Policy File
See the Policy File Effects

API and Tools Use for Secure Code and File Exchanges

Signing Code and Granting It Permissions

Steps for the Code Signer Download and Try the Sample Application Create a JAR File Containing the Class File Generate Keys Sign the JAR File Export the Public Key Certificate
Steps for the Code Receiver Observe the Restricted Application Import the Certificate as a Trusted Certificate Set Up a Policy File to Grant the Required Permission Start Policy Tool Specify the Keystore Add a Policy Entry with a SignedBy Alias Save the Policy File See the Policy File Effects

Exchanging Files

Steps for the Contract Sender Create a JAR File Containing the Contract Generate Keys Sign the JAR File Export the Public Key Certificate
Steps for the Contract Receiver Import the Certificate as a Trusted Certificate Verify the JAR File Signature

Generating and Verifying Signatures

Generating a Digital Signature Prepare Initial Program Structure Generate Public and Private Keys Sign the Data Save the Signature and the Public Key in Files Compile and Run the Program
Verifying a Digital Signature Prepare Initial Program Structure Input and Convert the Encoded Public Key Bytes Input the Signature Bytes Verify the Signature Compile and Run the Program
Weaknesses and Alternatives

Implementing Your Own Permission

ExampleGame
The HighScore Class
The HighScorePermission Class
A Sample Policy File
Putting It All Together Steps for the HighScore Developer (Chris) Steps for the ExampleGame Developer (Terry) Steps for a User Running ExampleGame (Kim)

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