We architect, develop, and audit custom smart contracts that form the immutable backbone of your application. Our engineers specialize in Solidity, Rust, and Vyper for EVM, Solana, and other leading chains.
LABS
Services
Zero-Knowledge Application Circuit Security Testing
Specialized penetration testing for ZK application logic and circuit implementations. We identify critical constraint system flaws and proof verification bypasses that generic audits miss.
Chainscore © 2026
overview
CORE SERVICE
Smart Contract Development
Secure, production-ready smart contracts built by Web3 experts to power your token, DeFi, or NFT project.
- Full Lifecycle Development: From initial design and
OpenZeppelinintegration to deployment and on-chain verification. - Security-First: Rigorous internal audits, formal verification, and adherence to industry best practices to mitigate exploits.
- Gas Optimization: Code engineered for maximum efficiency, reducing user transaction costs by up to 40%.
- Real-World Ready: Contracts built for mainnet deployment with upgradeability patterns and comprehensive testing suites.
Deploy with confidence. We deliver battle-tested contracts that secure your assets and enable complex logic, from simple
ERC-20tokens to sophisticated DeFi protocols.
key-features-cards
PROVEN FRAMEWORK
Our ZK-Specific Security Methodology
We apply a multi-layered, protocol-agnostic security framework designed specifically for the unique attack surfaces of zero-knowledge circuits and proving systems.
01
Circuit Logic & Constraint Analysis
Manual review of your custom circuit logic (Circom, Halo2, Noir) to identify constraint system vulnerabilities, arithmetic overflows, and soundness flaws that automated tools miss.
100%
Manual Review
O(1)
Soundness Guarantee
02
Proving System Security Audit
In-depth assessment of your proving stack (Groth16, PLONK, STARK) configuration, trusted setup participation, and cryptographic backend to prevent proof forgery and setup corruption.
Certified
Ceremony Audit
Zero Trust
Assumption Review
03
Integration & Adversarial Testing
Simulated attacks on the full application stack—from the circuit through the verifier contract—testing for front-running, proof malleability, and fee manipulation.
E2E
Attack Vectors
>50
Test Cases
04
Gas & Performance Optimization
Analysis and recommendations for optimizing on-chain verifier gas costs and prover performance without compromising cryptographic security or soundness.
Up to 70%
Gas Reduction
Benchmarked
Prover Speed
06
Remediation & Post-Audit Support
Prioritized vulnerability reports with actionable fixes, follow-up reviews, and guidance on secure development practices for your ongoing ZK engineering.
P0-P3
Priority Triage
30-Day
Support Window
benefits
ENTERPRISE-GRADE ASSURANCE
Why Founders Choose Our ZK Security Testing
Founders building with zero-knowledge proofs need more than a checklist audit. We deliver a comprehensive security assessment that protects your protocol's integrity and your team's reputation.
01
Circuit-Specific Threat Modeling
We analyze your unique ZK circuit logic for domain-specific vulnerabilities, not just generic smart contract flaws. Our experts identify risks in custom constraints, public/private input handling, and proof verification logic before deployment.
100+
Circuit Templates Analyzed
O(1)
Verification Gas Overhead
02
Formal Verification Integration
We integrate tools like Circomspect and manually verify the mathematical soundness of your R1CS or Plonk constraints. This proves the absence of critical bugs, ensuring your circuit computes exactly what you intend.
Zero
Soundness Error Tolerance
Circom/Halo2
Framework Support
03
Gas & Performance Auditing
We profile and optimize the on-chain verification cost of your proofs. Our reports detail gas consumption per constraint and recommend optimizations to reduce fees by up to 40% for end-users.
≤ 40%
Gas Reduction Target
Gnark/Circom
Framework Expert
04
Upgrade & Dependency Security
We audit the security of your ZK library dependencies (e.g., circomlib) and provide a safe upgrade path for circuit logic. This prevents introducing vulnerabilities through downstream updates and ensures long-term maintainability.
SemVer
Compliance Checked
Dependency Graph
Full Analysis
Why ZK Circuits Demand Specialized Security
ZK-Specific Testing vs. Generic Smart Contract Audit
Generic smart contract audits miss critical vulnerabilities in zero-knowledge circuits. This table compares our specialized ZK testing service against standard audit approaches.
| Security Focus | Generic Smart Contract Audit | Chainscore ZK Circuit Testing |
|---|---|---|
Arithmetic Circuit Logic Review | ||
Constraint System Verification | ||
Trusted Setup Ceremony Review | ||
ZK-SNARK / ZK-STARK Prover/Verifier Code | ||
Standard Solidity/ Vyper Smart Contracts | ||
Gas Optimization & Common Vulnerabilities | ||
Integration Testing (On-Chain + Off-Chain) | Limited | Comprehensive |
Report Includes ZK-Specific Attack Vectors | No | Yes (e.g., soundness, setup toxicity) |
Auditor ZK Cryptography Expertise | Variable | Required (PhD-level) |
Typical Project Timeline | 2-3 weeks | 4-6 weeks |
Starting Project Cost | $10K - $30K | $50K+ |
process-walkthrough
CORE SERVICE
Smart Contract Development
Secure, production-ready smart contracts built by Web3-native engineers.
We architect and deploy custom smart contracts for tokens, DeFi protocols, and NFT ecosystems. Our code is built on Solidity 0.8+ with OpenZeppelin standards and undergoes rigorous security audits before mainnet deployment.
From concept to mainnet in as little as 2-4 weeks with a dedicated technical team.
- Token Systems:
ERC-20,ERC-721,ERC-1155with custom minting, vesting, and governance logic. - DeFi Protocols: Automated market makers (AMMs), lending/borrowing pools, and yield aggregators.
- Security First: Formal verification, unit/integration testing, and third-party audit preparation.
tech-stack
EXPERTISE ACROSS THE ZK ECOSYSTEM
Protocols & Frameworks We Test
Our security engineers specialize in the most widely adopted and emerging zero-knowledge frameworks, delivering battle-tested circuit audits that ensure mathematical correctness and operational security.
06
Custom ZK Frameworks
Tailored security evaluation for proprietary or novel proof systems. We analyze cryptographic assumptions, circuit compiler outputs, and prover/verifier implementations.
White-Glove
Approach
Research-Grade
Analysis
Technical & Commercial Questions
ZK Circuit Security Testing FAQs
Get clear answers on our methodology, timeline, and security guarantees for zero-knowledge circuit audits.
We employ a rigorous, multi-layered methodology: 1) Specification & Logic Review – We verify the circuit's mathematical logic matches the intended application. 2) Implementation Audit – Manual line-by-line review of Circom, Halo2, or Noir code for vulnerabilities. 3) Constraint System Analysis – We check for under-constrained/over-constrained systems and soundness errors. 4) Cryptographic Review – Assessment of trusted setup, elliptic curve usage, and Fiat-Shamir transformations. 5) Tool-Assisted Analysis – Using formal verification tools and custom fuzzing to uncover edge cases. This process has secured over $500M+ in TVL across 50+ ZK projects.
ENQUIRY
Get In Touch
today.
Our experts will offer a free quote and a 30min call to discuss your project.
NDA Protected
Confidentiality24h Response
Time to ValueDirectly to Engineering Team
No Sales Fluff10+
Protocols Shipped
$20M+
TVL Overall