Quote from: michaeljackson on July 16, 2012, 03:38 amIt's an mp3 music file ascii armored. I wanted to see if you had any problems decrypting it and whether it tells gpg the filename and extension if you just copy/pasted the text.When the cipher block is decrypted the output may include the original filename. By default that data won't be displayed, but if the file is decrypted with the "-v" flag the information will be displayed. The output filename when decrypting will be based on the name of the encrypted file, not the original filename. It can also be overridden by the "-o" (or "--output") flag.Quote from: michaeljackson on July 16, 2012, 03:38 amDo you know if it's possible for a third party to tell by looking at a pgp encrypted message what it could be or who it is intended for without the private key? I've done some reading and seem to be getting conflicting reports.The short answer is yes, a third party can narrow down the recipients (or likely recipients) from a message that was encrypted using default settings/options and which they do not have the corresponding secret key for.If this third party has the public keys of the recipients of the message in their keyring then GPG will identify that the message is encrypted to those keys. If the third party only has one of the relevant public keys then GPG will identify that key and display the short key ID of the keys it cannot identify. Those key IDs may be able to be used to locate the public keys that the third party did not have (such as from a keyserver).It is, however, possible to conceal one, some or all of the recipients of a message using the "--hidden-recipient" (or "-R"), "hidden-encrypt-to" and/or "--throw-keyid" options. I went into this in a little more detail (with examples) using "--throw-keyid" a couple of weeks ago:http://dkn255hz262ypmii.onion/index.php?topic=29235.0These two pages of options in the GPG manual are worth checking when experimentig with concealing the recipients:http://www.gnupg.org/documentation/manuals/gnupg-devel/GPG-Configuration-Options.htmlhttp://www.gnupg.org/documentation/manuals/gnupg-devel/GPG-Key-related-Options.htmlOh, the message I left for Pine in this thread also used the "--throw-keyid" option, so you can have a look at that too.