Is it possible to encrypt a message using PGP so that multiple recipients (each with their own public private keypair) can decrypt it? I'd like to email one message which can be decrypted by each person with their own keys.
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1 Answer
Yes, it's possible – practically all PGP software will let you add multiple recipients when encrypting; no additional configuration is needed.
- 21Just to add, what PGP does is generate a key for a symmetric cipher, and cipher that for each recipient with their public key. So the message for many recipients isn't much larger than that for 1.vonbrand– vonbrand2013-02-19 23:03:25 +00:00Commented Feb 19, 2013 at 23:03
- 2Is there any technical limit on the number of recpients? Like a whole company of 100 people?Alex– Alex2016-02-26 20:49:54 +00:00Commented Feb 26, 2016 at 20:49
- So the symmetric key is encrypted for each recipient with their public key. Does each receive a different ciphertext or the same ciphertext with a header length proportional to the number of recipients?doughgle– doughgle2019-11-19 11:53:54 +00:00Commented Nov 19, 2019 at 11:53
- There's one copy of ciphertext and multiple copies of the same symmetric key.grawity– grawity2019-11-19 12:02:53 +00:00Commented Nov 19, 2019 at 12:02