zkDaily - 2026-03-24

零知识证明 zkDaily

ZKP Frontier Tracker 🎯

Tue

03.24

2026

NI-DKG: Non-Interactive Distributed Key Generation Using Blockchain and Zero-Knowledge Proofs

Paper

https://eprint.iacr.org/2026/552

Alex Kampa DKG Smart Contract

Kampa et al. proposed a non-interactive DKG protocol, NI-DKG, in their paper, using ZK proofs to eliminate dispute phases and leveraging blockchain as a coordination layer, simplifying key generation.

Notes

NI-DKG uses ZK proofs to ensure contribution correctness, eliminating dispute phases in traditional DKG
Relies on Shamir secret sharing, Feldman commitments, hashed ElGamal, and Chaum-Pedersen proofs
Uses smart-contract blockchains as timed public bulletin boards for non-interactive coordination
Provides EVM-compatible implementation with circuit specs for key generation and threshold decryption
Discusses EVM verifier constraints on public inputs and solutions
On-chain zk-SNARK verification improves trustworthiness and attack resistance

Collected by @icerdesign

零知识证明 zkDaily

Q&A Deep Dive 💬

Tue

03.24

2026

Why does NI-DKG not require commit-reveal?

NI-DKG uses a zk-SNARK to prove consistency of polynomial, commitments, and encrypted shares in one step, compressing commit, reveal, and verification into a single interaction.

Does removing commit enable adaptive attacks?

Yes. An adversary can adapt inputs after observing others, similar to batch evaluation. However, as long as one honest contribution is random, the final result remains unpredictable.

What does NI-DKG give up in its threat model?

It drops protection against last-mover bias and allows adaptive choice, so it does not ensure unbiased randomness but still guarantees correctness and key security.

Prompted by @icerdesign