Continuing with my example of encrypting a message to myself and AnonymousMan. This message has been encrypted to us both.-----BEGIN PGP MESSAGE-----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Sm8m-----END PGP MESSAGE-----Let's open the command line/terminal and run gpg -v again on a file containing this message.gpg -v encrypted_msg.ascThe result is:gpg: public key is AE064BC4gpg: public key is 00000000gpg: encrypted with RSA key, ID 00000000gpg: encrypted with RSA key, ID AE064BC4Interesting! WTF is a public key with an ID of 00000000? Anonymous, that is what. There is no way to prove that Pine encrypted that message. Of course I'm telling you that I did so. But there is absolutely no evidence for it.How did I achieve this?There exists a configuration file in your PGP or GPG setup called gpg.conf or similar. If you don't know the location of this file on your computer, google "gpg.conf" and the name of your GPG or PGP distribution and you should find it. The location differs from operating system and PGP/GPG setup, so I won't describe where it generally hides out here.In any case, open it with a plaintext text editor like Notepad or Gedit and append this line to the file, then save it. hidden-encrypt-to <YOUR GPG PUBLIC KEY ID HERE>The result is twofold.1. All messages you now encrypt to others can be decrypted by yourself also e.g. in case you needed to add something and only remembered after you encrypted it, a common occurrence. Or to correct spelling. Whatever.2. There is no evidence your public key was used to encrypt the message.Highly useful I think.