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Trail: Security in Java 2 SDK 1.2
Lesson: Exchanging Files

## Steps for the Contract Receiver

> Now acting as Ruth, who receives the signed JAR file and the certificate file from Stan, perform the following steps, as shown in the figure.

> 1. Import the Certificate as a Trusted Certificate, using the `keytool` `-import` command.

> 2. Verify the JAR File Signature, using the `jarsigner` tool.

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