  == Extension of copyright to master key ==  Per WP:ELNEVER, I have been removing any link to a published version of the master key. This operates on the theory that the master key is the copyrighted property of DCP, LLC. The API and all the accompanying documentation are released under license and would of course be protected by copyright. The only thorny question is whether a non-public part of the API, such as a hex version of the master key, would also be covered. If someone can show a clear cut reason why the hex version belongs in the public domain then I'd be happy to relent. However, WP tends to err on the side of caution w.r.t. copyright violation. Are there any experts who can help out here?   