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Privacy issue when GnuPG-encrypted messages have BCC recipients, BCCs are included in the encryption list along with other recipients
Author: mfpa. When using OpenPGP encryption on a message that has some BCC recipients, a single copy of the message is encrypted to all recipients including the BCCs. This reveals the existance of the BCCs to each other and to the rest of the recipients. And the fact that most OpenPGP keys have user-IDs containing names and email addresses means there is little point using BCC. Two examples of an email client that does it differently:- 1. KMail encrypts an individual copy for each BCC recipient...
Modified: 13 December 2014
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