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Trail: Security in Java 2 SDK 1.2
Lesson: Signing Code and Granting It Permissions

## Export the Public Key Certificate

> You now have a signed JAR file `sCount.jar`. The runtime system of the code receiver (Ray) will need to authenticate the signature when the `Count` application in the signed JAR file tries to read a file and a policy file grants that permission to this signed code.

> In order for the runtime system to authenticate the signature, Ray's keystore needs to have the public key corresponding to the private key used to generate the signature. You supply this by sending Ray a copy of the certificate authenticating the public key. Copy that certificate from the keystore `susanstore` to a file named `SusanJones.cer` via the following:

> >     keytool -export -keystore susanstore -alias signFiles -file SusanJones.cer

> You will be prompted for the store password (`ab987c`).

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