I like to also add an anonymous recipient feature present in OpenPGP. (-R or --throw-keyid for GnuPG) to strip metadata. (Supported at least on GnuPG for encry

I like to also add an anonymous recipient feature present in OpenPGP. (-R or --throw-keyid for GnuPG) to strip metadata. (Supported at least on GnuPG for encryption/decryption, and Mac version of PGP for decryption. For some reason, not on Windows.) Also, implementations like GnuPG will allow recipient ID to be spoofed, but even less implementation will support it. I believe using this in conjunction with some garbage recipients (with a secret key thrown out immediately after the creation of a public key) will randomize metadata quite well for OpenPGP. EDIT: clarified option switch is for GnuPG