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? Thanks Alphazo
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