[ietf-dkim] A question about DKIM and Phishing

Stefan Görling stefan at gorling.se
Sat Aug 12 05:20:16 PDT 2006


>>"With DomainKeys, the absence of a verifiable digital signature
>>header in an E-mail purporting to be from a domain which has
>>a DomainKeys DNS record may indicate that that E-mail is a
>>forgery. Thus, E-mails may be divided into three classes:
>>
>>    * valid DomainKey signature: authentic
>>    * invalid or missing DomainKey signature for a domain with the DNS
>>      record: usually forged
>>    * no DNS record or header: unknown status"
>>
>>As I have understood it, you can not really find the
>>DomainKey-DNS-record unless you know the selector, which
>>you do not really unless you have a domainKey signature. Is
>>this correct or have I misinterpreted the drafts?
>>    
>>
>
>Your deduction is correct. Dr. Watson. :-)
>  
>
Thank you.

>It is similar to the current DKIM Policy discussions here, regarding the
>need to find the policy expectation for signing when the signature is not
>there, or there and not expected, and other policy inconsistency
>considerations.
>  
>
Thank you, I will try to read back on that discussion as I'm studying 
SPF and other anti-phishing mechansims right now where this plays a 
vital part, which is why I posted the question.

/Stefan



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