Add SM2 crypto to your Substrate chain | Substrate Seminar

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United Kingdom Parity Tech
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Published on ● Video Link: https://www.youtube.com/watch?v=E1OymWVTZqM


Duration: 1:22:03
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11

Parity's Maggie Dong demonstrates Substrate accounts that use alternative cryptographic schemes. She'll show her work adding the sm2 scheme and submitting transactions with subxt.

2:48 Basics of Eliptic Curve Cryptography
based on https://andrea.corbellini.name/2015/05/17/elliptic-curve-cryptography-a-gentle-introduction/
27:57 What is SM2?
30:03 Strategy for integrating SM2 in Substrate
36:56 Implementing Substrate's Crypto Traits
43:00 Runtime interface for calling into STD environment
50:06 Re-defining MultiSigner and MultiSignature
54:23 Demo signing transactions with SM2 subxt

1:05:27 Question about on-chain PKI design
1:13:51 Working as a Blockchain Developer

The repo Maggie showed:
https://github.com/hammeWang/substrate-sm2

SM2 vs ECDSA?
https://crypto.stackexchange.com/questions/9918/reasons-for-chinese-sm2-digital-signature-algorithm

Details about different ECC curves
https://safecurves.cr.yp.to/index.html
The SM2 curve is not on it, but it does contain a lot of info about what makes one curve “good” and another “bad”.

Relevant Rustdocs:
Pair https://crates.parity.io/sp_core/crypto/trait.Pair.html
Public https://crates.parity.io/sp_core/crypto/trait.Public.html

MultiSigner https://crates.parity.io/sp_runtime/enum.MultiSigner.html
MultiSignature https://crates.parity.io/sp_runtime/enum.MultiSignature.html

Substrate-subxt that Maggie uses for submitting transactions https://github.com/paritytech/substrate-subxt

Chris's experimental code, BoxKeys https://gitlab.com/totem-tech/totem-substrate/-/blob/master/node/runtime/src/boxkeys.rshttps://www.youtube.com/watch?v=qaykNPHJcyw

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Tags:
Blockchain
Substrate
Eliptic curve cryptography
SM2
ECDSA
subxt