Poster: CoVer: Collaborative Verifiable Proof Generation for Efficient Zero-Knowledge Protocols

Abstract

Zero-knowledge proofs (ZKPs) are increasingly adopted in practical cryptographic systems, yet zkSNARK generation remains computationally expensive, limiting scalability. Recent distributed zkSNARK frameworks, such as zkSaaS and Siniel, mitigate this cost by partitioning witnesses across multiple workers. However, they often depend on heavy MPC interactions and full verifier-side proof checking, which hinders their usability in asynchronous or large-scale settings. We present CoVer, a novel distributed zkSNARK system over binary fields, optimized for hardware-level parallelism. CoVer introduces a verifier-guided VOLE-based challenge mechanism that enforces global constraint consistency across subproofs while removing multi-round MPC and tag consistency checks. This design reduces communication and prevents challenge manipulation. Experiments show CoVer achieves up to$150 \times$verification efficiency improvement under variable bandwidth conditions.