[Blockchain-interop] Summary Notes from IETF DLT Gateway Interop meeting (15 February 2022)

[Thomas Hardjono <[e-mail]>]

Folks,

Here is the summary notes from our meeting on Tue 15 Feb 2022.

I'd like to extend a big thank you to Gang Wang for his presentation. 

The link to his slides are in the notes.


-- thomas --


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Summary Notes from IETF Gateway Interoperability group meeting

Date: Tuesday 15 February 2022

(a) Attendees:

Peter Somogyvari
Tom McGary
Claire Facer
Bishakh Ghosh
Sandip Chakraborty
Gang Wang
Denis Avrilionis
Qin Wang
Krishnasuri N
John Robotham
Rafael Belchior
Venkatraman Ramakrishna
Dhinakaran Vinayagamurthy
Andre Augusto
Thomas Hardjono



(b) IETF Note Well slide

-- This group meeting operates under IETF IP Rules as described in RFC5378 and RFC8179.


(c) Presentation on Blockchain Interoperability (by Gang Wang, InterTrust)

-- Gang Wang's slides can be found here :  https://bit.ly/3JRrhiy

-- Gang Wang gave a presentation about the current challenges in interoperabiity across blockchains, and described a possible solution based on two primitives:  (i)  a (k, n)-threshold signature signatures and (ii) use of Trusted Hardware.  The threshold signature scheme (TSS) is used within an MPC (Multi-Party Computation). Note that this is different from multi-sig.

-- The proposal uses cross-AS (i.e. cross gateway) threshold signatures for integrity and atomicity.  The assumption here is that the devices (i.e. gateways) employ trusted hardware, thereby "rooting" the trust in the difficulty of extracting keying material from the hardware.

-- Message passing across blockchains is performed asynchronously (using paired or opposite operations): lock and unlock.  The relay transaction across the two AS-X and AS-Y carries proof from the trusted hardware.

-- The protocol is a 4-step protocol (following the basic 4-pahse atomic protocol): Setup, Commit, Verification, Abort.  It employs the 2-Phase Commit and hash-locking scheme.

-- The security analysis is based on the setup of the BFT protocol used to achieve consensus.  

-- Please contact Gang Wang for more detailed analysis on both Safety and Liveness, as well as the trusted services among ASs.



(d) Future Meetings

-- Tuesday 1 March, 2022.

-- Tuesday 15 March, 2022.

-- IETF113 week:  March 20-25, 2022

-- Tuesday March 29, 2022.



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