Implement Threshold Signatures for a Multi-Sig Custody Service
Overview
What this challenge is about.
Read the FROST IETF draft (draft-irtf-cfrg-frost) and the underlying Schnorr signature scheme on the secp256k1 curve. Implement the FROST distributed key generation (DKG) and 3-of-5 signing ceremony in Rust using the secp256k1 crate. Test against the IETF test vectors. Build a CLI harness that runs the ceremony across 5 separated processes (simulating air-gapped signers). Use the resulting signature to sign and broadcast a real testnet (Bitcoin signet) transaction. Deliver Rust code, test-vector validation, the CLI harness, the signet transaction proof, and a 6-page operational playbook covering DKG ceremony, signing ceremony, key-share rotation, and failure modes.
The Brief
What you'll do, and what you'll demonstrate.
Implement a 3-of-5 FROST signing ceremony and prove it produces a valid Schnorr signature accepted by Bitcoin signet.
Earning criteria — what you'll demonstrate
- Implement a state-of-the-art threshold-signature scheme from an IETF draft
- Reason about distributed key generation and rogue-key attacks
- Integrate cryptographic primitives with a real blockchain testnet
- Document the operational ceremony for non-crypto operators
Program Fit
Where this fits in your program.
Sharpens the same skills your degree expects you to demonstrate.
Skills
Skills you'll demonstrate.
Each one shows up on your verified credential.
Careers
Roles this prepares you for.
Real titles. Real skill bridges. Pick the one closest to your trajectory.
Career mappings coming soon.