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Re: [ietf-smtp] DKIM encryption, was Request for discussion

2013-10-16 16:03:09
Bonus anti-traffic analysis hack: new wrapped message is always sent
to: postmaster(_at_)recipient(_dot_)com with subject: encrypted message, real
recipient and subject recovered from Subject: and DKIM-Encrypted-To:
headers in the encapsulated message.

Use RFC 2442? Dan Newman had intended from the start that RFC 2442 could be combined with "something else" to provide end-to-end encryption of the envelope.

I suppose so, although it seems that just sticking Return-Path: and Delivered-To: lines at the top of the message is all it needs to do before encrypting.

With 2442, either it'd be doubly wrapped, an application/batch-SMTP inside an application/dkim-encrypted. or it'd be a modified batch-SMTP, in which case it's probably not worth the effort unless people want to be able to send wrapped batches of messages.

John Levine, johnl(_at_)taugh(_dot_)com, Taughannock Networks, Trumansburg NY
"I dropped the toothpaste", said Tom, crestfallenly.

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