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Re: [imapext] General Request for Assignment (imap-keywords) (was: [JMAP] SMIME Attachments)

Arnt Gulbrandsen <arnt@gulbrandsen.priv.no> Tue, 14 November 2017 14:25 UTC

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From: Arnt Gulbrandsen <arnt@gulbrandsen.priv.no>
To: imapext@ietf.org
Date: Tue, 14 Nov 2017 14:25:06 +0000
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Subject: Re: [imapext] General Request for Assignment (imap-keywords) (was: [JMAP] SMIME Attachments)
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Bron Gondwana writes:
> The usecase is that the entire message is encrypted as a single 
> blob, but it contains an attachment.  The client wants to mark 
> that so that other clients know it has an attachment.

Oh, right.

> There are questions about that being a metadata leak that 
> haven't been addressed.

I thought about those and it seems insignificant. The size of the encrypted 
blob is a good proxy for that information anyway. Big? Attachment. Small? 
No.

> Anyway, I don't think the whole way this would work has been 
> well thought out yet.

AOL. It would seem to serve the case where the user uses two clients, both 
of which display whether a message has an attachment and neither of which 
displays any other information from inside the blob. In particular, neither 
can display an excerpt of the text, or any information about the kind of 
attachment.

Arnt

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