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

TerrysGame

The HighScore Class

The HighScorePermission Class

A Sample Policy File

Putting It All Together

Steps for the HighScore Developer (Chris)

Steps for the TerrysGame Developer (Terry)

Steps for a User Running TerrysGame (Kim)