certain emails and chats were still indecipherable by the NSA database when they had been encrypted with the right tools....encryption also caused major problems for the agency, causing entire messages to disappear from the system, leaving only the message: "No decrypt available for this PGP encrypted message."

keyserver timed out when trying to add a GPG public key
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For me it was required to add ENV statements into my docker file
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This is usually caused by your firewall blocking the port 11371. You could unblock the port in your firewall. In case you don't have access to the firewall you could either:
1- Force it to use port 80 instead of 11371

http://unix.stackexchange.com/questions/75892/keyserver-timed-out-when-trying-to-add-a-gpg-public-key