On Tuesday 18 November 2014 22:43:18 MFPA wrote: > On Tuesday 18 November 2014 at 6:15:57 PM, in > <mid:546b8cdd.5010...@riseup.net>, Mirimir wrote: > > As long as messages were separately encrypted to each > > recipient, no third parties would be involved. > > For an email message with multiple recipients, I think most mail > clients and OpenPGP encryption agents that I have looked at encrypt > the message to all addressees at once. I only recall one combination > that encrypted an individual copy for each addressee, and am not sure > I correctly remember which it was.
KMail encrypts an individual copy for each BCC recipient. I thought Thunderbird+Enigmail would also do this. Any mail client not doing this completely subverts BCC (unless --throw-keyids or --hidden-recipient is used, but even throwing the key IDs still leaks the number of hidden recipients). Regards, Ingo
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