Schnorr Signatures and MuSig over Arkworks

This project provides a modular and zk-friendly implementation of Schnorr signatures and MuSig multi-signatures over elliptic curve groups, using the arkworks ecosystem.

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Features

• Poseidon-based sponge hashing (native implementation)
• Schnorr signatures over any curve group (G: CurveGroup)
• MuSig multi-party signatures: Aggregates signatures from multiple participants
• Transcript abstraction for Fiat–Shamir transformation
• Designed for ZK circuits, recursive proofs, and modular backend swaps

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Usage

This crate is under active development. Stay tuned for:

• Expanded unit tests
• Circuit-ready signature gadgets
• Seamless spongefish drop-in support

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Basic Example: Single Signature

To see basic Schnorr signatures and MuSig multi-signatures in action, you can run the following examples:

Basic Schnorr Signature Example

You can run a minimal example:

cargo run --example basic_sign

This will:

• Generate a key pair

• Sign a message

• Verify the signature using a Poseidon-based transcript

See examples/basic_sign.rs for full code.

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MuSig Example: Multi-party Aggregated Signature

To see MuSig multi-signature aggregation across multiple participants, run the following:

cargo run --example musig_sign

This will:

• Aggregate signatures from two participants

• Verify the aggregated MuSig signature using a Poseidon-based transcript

See examples/musig_sign.rs for full code.

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