ZKP Frontier Tracker 🎯
零知识证明 前沿热点追踪 🎯
Fri 星期五
06.06
2025
Malicious Security in Collaborative zk-SNARKs: More than Meets the Eye https://eprint.iacr.org/2025/1026
Garg et al. analyzed malicious security in collaborative zk-SNARKs in paper, revealing two traps in existing design templates that could lead to input privacy leaks and proposed countermeasures. Garg等人在论文中分析了协作zk-SNARKs中的恶意安全问题，揭示了现有设计模板中的两个陷阱，可能导致输入隐私泄露，并提出了缓解策略。
Notes
- Collaborative zk-SNARK (coSNARKs) design has privacy leakage risks, such as invalid witnesses exposing honest party inputs
- Directly applying malicious security compilers (MPC) may render the entire system insecure
- Under the assumption of honest majority, traditional compilers' security checks can be omitted to improve efficiency
- First implementation of semi-honest MPC protocol to achieve malicious security in non-trivial cases
- Optimization scheme reduces proof generation overhead, applicable to various zk-SNARK schemes
- Positive results are general and may have applications beyond collaborative zkSNARKs