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Re: [dmarc-ietf] DMARC forensic reports (ruf=) and privacy

Vladimir Dubrovin <dubrovin@corp.mail.ru> Sat, 26 January 2019 13:26 UTC

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To: Дилян Палаузов <dilyan.palauzov@aegee.org>, dmarc@ietf.org
References: <40a9f309a70254b799f8bc3e42cbec2f5cf9dd7b.camel@aegee.org>
From: Vladimir Dubrovin <dubrovin@corp.mail.ru>
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Date: Sat, 26 Jan 2019 16:26:18 +0300
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Archived-At: <https://mailarchive.ietf.org/arch/msg/dmarc/rq_TugsrWkuMYA30VwbQnU4UKyo>
Subject: Re: [dmarc-ietf] DMARC forensic reports (ruf=) and privacy
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Message sender can expect message content is only stored in sender's and
recipient's mailboxes after delivery. If deleted by both sender and
recipient, this message is not longer exists and it's content can not be
recovered.

In this scenario, (partial) message content can be stored in DMARC
forensic subsystem unknowingly to user, it may violate user's privacy
expectations and/or rights, depending on local legislation.



26.01.2019 14:37, Дилян Палаузов пишет:
> Hello,
>
> for a smooth working DMARC DKIM signers and verifiers must be interoperatable.  When a server DKIM-signs a message and
> sends it to another server without intermediates, the latter shall be able verify the signature.  Imagine, the DKIM
> validation fails and the ruf= dmarc report email address points to the sending server.
>
> What are the privacy concerns in this simple scenario that speak against sending a DMARC/DKIM report to sending server,
> telling that the DKIM validation fails?
>
> https://tools.ietf.org/html/rfc7489#section-9 mentions some privacy thoughts, but these are not applicable when the
> sending server obviously has already the reported message and no intermediates are involved, that could expose
> additional information.
>
> Regards
>   Дилян
>
> _______________________________________________
> dmarc mailing list
> dmarc@ietf.org
> https://www.ietf.org/mailman/listinfo/dmarc


-- 
Vladimir Dubrovin
@Mail.Ru

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