[pkng] Delay tolerant key management
Stephen Farrell <stephen.farrell@cs.tcd.ie> Wed, 19 August 2009 11:12 UTC
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Date: Wed, 19 Aug 2009 12:12:12 +0100
From: Stephen Farrell <stephen.farrell@cs.tcd.ie>
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Subject: [pkng] Delay tolerant key management
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So I'll bite and try see if anyone else is interested in this one. The DTNRG [1] has defined the bundle protocol, [2] a delay tolerant networking protocol, and has drafts for some security mechanisms [3] that are roughly similar to ESP. However, DTNRG doesn't have any delay tolerant way to establish keys between nodes, so I'd like one (or more) of those please:-) I guess I'd like a way to transport/agree symmetric keys and a way to transfer public keys (for signature verification/key-encryption). The main thing that differs here from more normal networking contexts is that round trips may take a looong time, packets (bundles) may be routed using complex schemes (e.g. epidemic or sub-epidemic routing) resulting in some bundles being fragmented, duplicated, going missing or arriving seriously out of order. And of course we can't assume that nodes have on-line or direct access to (trusted or not) third parties for things like path construction, CRLs, OCSP or IBE key generators. I wrote up a (now expired) I-D [4] with some initial (and very vague) requirements a while back. I guess if this RG were to do work on this topic, then a successful output might also be interesting for key mgmt in other contexts where the nodes concerned don't directly communicate. Stephen. [1] http://www.dtnrg.org/ [2] http://tools.ietf.org/rfc/rfc5050 [3] http://tools.ietf.org/html/draft-irtf-dtnrg-bundle-security [4] http://tools.ietf.org/html/draft-farrell-dtnrg-km
- [pkng] Delay tolerant key management Stephen Farrell