Variable: mml-secure-safe-bcc-list

mml-secure-safe-bcc-list is a customizable variable defined in mml-sec.el.gz.

Value

nil

Documentation

List of e-mail addresses that are safe to use in Bcc headers.

EasyPG encrypts e-mails to Bcc addresses, and the encrypted e-mail by default identifies the used encryption keys, giving away the Bcc'ed identities. Clearly, this contradicts the original goal of
*blind* copies.
For an academic paper explaining the problem, see URL https://crypto.stanford.edu/portia/papers/bb-bcc.pdf. Use this variable to specify e-mail addresses whose owners do not mind if they are identifiable as recipients. This may be useful if you use Bcc headers to encrypt e-mails to yourself.

This variable was added, or its default value changed, in Emacs 25.1.

Source Code

;; Defined in /usr/src/emacs/lisp/gnus/mml-sec.el.gz
(defcustom mml-secure-safe-bcc-list nil
  "List of e-mail addresses that are safe to use in Bcc headers.
EasyPG encrypts e-mails to Bcc addresses, and the encrypted e-mail
by default identifies the used encryption keys, giving away the
Bcc'ed identities.  Clearly, this contradicts the original goal of
*blind* copies.
For an academic paper explaining the problem, see URL
`https://crypto.stanford.edu/portia/papers/bb-bcc.pdf'.
Use this variable to specify e-mail addresses whose owners do not
mind if they are identifiable as recipients.  This may be useful if
you use Bcc headers to encrypt e-mails to yourself."
  :version "25.1"
  :group 'message
  :type '(repeat string))