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Re: [Asrg] Spam Salt, an email sender authentication mechanism

2010-09-28 03:57:57

It's some sort of message signing schema.

As there are other quite good signing schemas around us, a discussion could be around comparing schemas. E.g., how do you place SpamSalt WRT DKIM ? What's the differences ? Why SpamSalt could be better or worse than DKIM ?

JM

Kai Engert wrote:
 Dear members of the ASRG mailing list,

I'd like to present you my anti-spam idea which I call Spam Salt.

Abstract:
The idea is to assign an additional secret key (salt) to each email user account. The email sender uses the salt and the message contents to calculate a hash value and adds that hash value as a new email header. For each email domain a verification server is registered in the DNS that can be contacted to verify the authenticity of messages that contain a hash value in the email headers. An email recipient can contact a verification server and filter incoming messages based on the verification response. As soon as multiple email recipients report that a sender is sending spam, the sender's salt gets changed, and future verification requests for messages that used the older salt will fail and such messages can be rated as Spam.

I'd like to invite you to read the detailed description of this idea, available at
http://kuix.de/spamsalt/

I'm looking forward to your feedback.
Thanks a lot in advance.

Regards,
Kai

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 Jose Marcio MARTINS DA CRUZ           http://j-chkmail.ensmp.fr
 Ecole des Mines de Paris
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