Hello, On Thu, Feb 03, 2011 at 03:38:12PM +0100, Alphazo wrote: > Is it possible to add or remove a recipient to an already encrypted file and > thus without re-encrypting the whole file? > > From what I understand GnuPG encrypts the payload (my binary file) with a > symmetric session key. Then it stores each recipient key ID (optional) as > well as an encrypted version of the session key using the public key of the > recipient (asymmetric encryption). > Assuming I own the private key of one the original recipient, could GnuPG > decrypt the session key and add/remove new recipients to the existing file?
For what it's worth, I tried to write such a tool for my own, and annouced it on this list; see http://www.mail-archive.com/gnupg-users@gnupg.org/msg13495.html for the announcement. If you are interrested, I think it would be possible to resurrect this project. Cheers, -- Nicolas Boullis _______________________________________________ Gnupg-users mailing list Gnupg-users@gnupg.org http://lists.gnupg.org/mailman/listinfo/gnupg-users
