One solution would be to silently accept the entered subject, but then
replace it with something like "Encrypted Email - PGP," or something
more "cryptic" (no pun intended) while moving the subject to the first
line of the email like this:
Subject: My username is spandex1, passwd is pqowiefjpoiqwerfpoiqjhwef
and then inserting a double return and encrypting the resulting
content-with-subject as usual.
But I think most people know that the sender and receiver and the date
sent and the general size of the email are going to be revealed to
anyone who intercepts it, and the subject is also in that group. But it
probably really shouldn't be.
The password program 1Password encrypts its database, of course, but it
does so by leaving each record title in plaintext and encrypting the
rest of the record. Since most people title their 1Password records with
the name of the service or website and perhaps even their usernames, a
lot of meta data is exposed and lot of your internet usage patterns are
exposed.
On 17 Jul 2014, at 0:36, Benny Kjær Nielsen wrote:
On 16 Jul 2014, at 15:41, Brad Knowles wrote:
ISTR that some clients will auto-replace the unencrypted subject line
with the contents of the encrypted subject (and other headers), once
the message is decrypted. And going the other way, they will put in
a placeholder like "Encrypted subject" into the envelope subject
line, which should get replaced on the other end when the message
gets decrypted.
Was it mutt or elm that did this? Don't remember -- it's been way
too long.
Well, let me know if you find a reference to some kind of
standard/documentation. It's not of much use if MailMate can encrypt
subjects while receiving email clients cannot decrypt them. For
example, MailMate never decrypts subject lines…
--
Benny
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