More of this Feature • Part 1: Introduction • Part 2: Use PGP with a Chain of Cypherpunk Remailers

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Eventually, we need to encrypt the message for the first remailer and tell it we used PGP to encrypt it.

From: "Heinz Tschabitscher" <semper@doubt.com>
To: mixmaster@lobeda.jena.thur.de
Subject: Who could this be from?

::
Encrypted PGP

-----BEGIN PGP MESSAGE-----
Version PGPfreeware 6.5.3 for non-commercial use <http//www.pgp.com>
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=/ADn

-----END PGP MESSAGE-----

That's all (some might say "enough" instead). If you want to add more remailers to the chain, and this is what you should do, repeat the steps above for each, going from the last in the chain forward to the first.

Traffic Analysis

It even makes sense to have one and the same remailer appear two or more times in the chain. This is because with the traffic a remailer has the chances diminish that a message might be traced even if we used a chain of remailers and PGP encryption.

If remailers have little traffic, every email message may stand out. And if three remailers happen to deal with a message shortly after one another, the path the email took can be reproduced. To avoid this, it is good to generate traffic on remailers so that an analysis of the log might not lead from the recipient of our (then) "anonymous" message to us.

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