zkDaily - 2026-02-15

零知识证明 zkDaily

ZKP Frontier Tracker 🎯

Sun

02.15

2026

Anonymous Prediction Market

OSS

https://github.com/wizicer/anonymous_predicting_market

icerdesgin Prediction Market DKG

@icerdesign and @ChinnellHeish developed an anonymous prediction market using threshold encryption and ZK proofs to prevent copy-trading and front-running. Featuring browser-native P2P DKG and batch settlement, it won 1st Place in the Mantle Hackathon ZK Track.

Notes

Won 1st Place in the Mantle Hackathon ZK Track
Addresses prediction market transparency by encrypting bets to hide positions and prevent copy-trading and front-running.
Uses threshold encryption and ZK proofs to keep betting directions private until settlement.
Implements browser-native P2P DKG without centralized servers for enhanced decentralization and security.
Employs ephemeral keys to simplify decryption, supporting asynchronous workflows for robustness.
Reduces gas costs via batch ZK proof settlement, improving efficiency.

Collected by @icerdesign

零知识证明 zkDaily

Q&A Deep Dive 💬

Sun

02.15

2026

How does the “dark market” hide betting direction during the betting phase?

Users encode the direction in the parity of an elliptic curve point and apply threshold ElGamal encryption with a zero-knowledge proof. On-chain observers see only ciphertext and commitments, keeping direction hidden until settlement.

Why use off-chain batch decryption instead of per-bet on-chain decryption?

Per-bet on-chain decryption is expensive. The system decrypts all bets off-chain and submits a single batch-opening ZK proof to verify aggregated results, greatly reducing gas costs.

How does encoding direction in elliptic curve point parity enhance ciphertext indistinguishability?

Embedding direction in the parity of a random elliptic curve point ensures the ciphertext appears statistically indistinguishable from random noise. Attackers cannot infer “yes” or “no” from structural patterns.

Prompted by @icerdesign