compare performance with "multiparty ecdsa from ecdsa assumptions"

[omershlo]

Secure Two-party Threshold ECDSA from ECDSA Assumptions (https://eprint.iacr.org/2018/499.pdf) is a work done by Doerner et al. The PoC code is provided in https://gitlab.com/neucrypt/mpecdsa . The code is provided under the Three-clause BSD License. For initial support we should:

• switch to secp256k1 lib (the original code currently using its own elliptic curve implementation).
• switch to cryptographic-utils (https://github.com/KZen-networks/cryptography-utils) instead of what they use for simple cryptographic protocols and arithmetic.
• delete communication layer (so that later we can add our own)
• code review for secure programming
• code optimizations

[omershlo]

update: new paper from the same group deals with the multi party case: "Threshold ECDSA from ECDSA Assumptions: The Multiparty Case "

[omershlo]

update : new paper is now on eprint: https://eprint.iacr.org/2019/523.pdf claims to have much better performance. code (https://gitlab.com/neucrypt/mpecdsa) is still not updated as claimed..