Hi On Mon, 21 Jan 2013 14:43:35 -0500 Jean-David Beyer <jeandav...@verizon.net> wrote:
> On 01/21/2013 11:56 AM, Rita wrote: > > Masteruser will be generating data and I would like userA and userC > > be able to decypt the data and others not to. However, in the > > future I would like to add userE to decrypt the data and remove > > userA (any old data she has is fine). I was wondering how I can > > achieve this using gpg > > > 1.) get gnupg software. http://gnupg.org/ > Install it, generate your keys and your revocation certificate (you > never know when you will need ont. > 2.) Upload your public key to a keyserver. > 3, Have A, and C do the same. > 3a.) If you want to anytime, have B and D do it too. > 4.) When you want to send data get the public keys for A and C. > 5.) Encrypt these data with the public the public keys of A and C. > > Am I missing something? I suspect that Rita was aiming at user E who at a later stage is added to the allowed readers. User E will still not be able to read earlier generated data. To my knowledge it is not possible to add another key to a already encrypted message. You would have to decode the original data and encode it again, this time using user E and user C public keys. -- Klaus _______________________________________________ Gnupg-users mailing list Gnupg-users@gnupg.org http://lists.gnupg.org/mailman/listinfo/gnupg-users
