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Rob will check out how to use public / private keys for the Java jar files.
There was an initial attempt to retrieve the private key used for signing the C# DLL but this did not appear to be possible (at least not in a trivial way). Since signing the DLL with a new key would mean having a new version of the DLL it was decided to sign the Java jar with a different key. Both key pairs will be kept by the chairman of the OATC.
Jesper will remove the keys from SourceForge.
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