[secdir] EDHOC and Transports
Tero Kivinen <kivinen@iki.fi> Fri, 25 January 2019 14:35 UTC
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Date: Fri, 25 Jan 2019 16:35:37 +0200
From: Tero Kivinen <kivinen@iki.fi>
To: Jim Schaad <ietf@augustcellars.com>
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Subject: [secdir] EDHOC and Transports
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Jim Schaad writes: > 3. 6LoPan over IEEE 802.15.4: This has a packet size of 127 bytes. The > maximum frame overhead size is 25 bytes allowing for 102 bytes of message > space. If one assumes 20 bytes of overhead for CoAP then this means a > protocol packet size of 82 bytes. If one needs to break the message across > multiple packets then the maximum data size is going to be 64 bytes using > CoAP blockwise options. IEEE 802.15.9 which provides framework for providing key management for IEEE 802.15.4 do provide its own fragmentation and reassembly service, thus allows bigger packets to delivered between devices. When 802.15.9 was being specified we saw that support for larger packets in KMP is needed than what 802.15.4 provides (note, that in some cases the phy layer limits the packet size even more), and thats why we did define a fragmentation and reassembly protocol there too. Currently specified key management protocols for 802.15.9 include 802.1X/MKA, HIP, IKEv2, PANA, Dragonfly, 802.11/4WH, 802.11/GKH, ETSI TS 102 887-2. Someone would need to write specification how to use EDHOC over 802.15.9 to make it usable there too. Another omission in the KMPs provided by the 802.15.9 is the TLS, as nobody wanted to write that specification. In the IEEE there is some plans of doing amendment to the 802.15.9 which could include some new key management protocols, depending who would be interesting to write the text... -- kivinen@iki.fi
- [secdir] EDHOC and Transports Jim Schaad
- Re: [secdir] EDHOC and Transports Hannes Tschofenig
- Re: [secdir] EDHOC and Transports Hannes Tschofenig
- [secdir] EDHOC and Transports Tero Kivinen