subject line -- to hide or not to hide

Werner Koch
Tue, 8 Feb 2000 08:39:21 +0100

On Tue, 8 Feb 2000, wrote:

> i've been wondering whether there is a good way to keep the subject
> of a message confidential w/o losing the convenience for the recipient
> of having a meaningful subject line.
I use a subject line with something which is not related to to the message like "Beer or Wine" or "Eat potatoes". This way you can easily figure out to which thread a message belongs but you are not giving away any information. There may be an interconnection somewhere deep in the brain and psychologists may find a way to deduce some information from the subject line. I think this is a much lower risk than all the information you can get from traffic analysis. If you want to encrypt the subject you should use MIME and encrypt an entire message as an rfc822 attachment. -- Werner Koch at keyid 621CC013