HashCloak - Private By Design Experts We build privacy-first solutions for the Internet We build privacy-first solutions for the Internet Start your journey Start your journey Our projects Our projects We craft privacy and security systems, grounded in proof and practice. HashCloak is a cryptography R&D lab that makes privacy and security features real, not just promised. Rigor where it matters, clarity everywhere, and outcomes your users can rely on. HashCloak has been instrumental for us building our blockchain infrastructure. They have covered very crypto vertical from auditing to writing custom zk circuits in our new language. I’d highly recommend HashCloak for anything crypto related. Nick Dodson - Fuel Labs Hashcloak's audit and security services for our Lelantus Spark privacy protocol demonstrated not just technical expertise but genuine passion in pushing the privacy space. Reuben Yap - Firo "HashCloak are a premium team. Excited to see them working on noir again 🎉" Zac Williamson - Aztec Network "HashCloak auditors spent a lot of time understanding our protocol, have good security findings and worked with us on the fixes. Mikerah and Manish are some of the best ZK auditors in the industry. I highly recommend ZK protocols doing audits with HaskCloak." Zhe Wang - Founder of Privacy Cash We craft privacy and security systems, grounded in proof and practice. HashCloak is a cryptography R&D lab that makes privacy and security features real, not just promised. Rigor where it matters, clarity everywhere, and outcomes your users can rely on. HashCloak has been instrumental for us building our blockchain infrastructure. They have covered very crypto vertical from auditing to writing custom zk circuits in our new language. I’d highly recommend HashCloak for anything crypto related. Nick Dodson - Fuel Labs Hashcloak's audit and security services for our Lelantus Spark privacy protocol demonstrated not just technical expertise but genuine passion in pushing the privacy space. Reuben Yap - Firo "HashCloak are a premium team. Excited to see them working on noir again 🎉" Zac Williamson - Aztec Network "HashCloak auditors spent a lot of time understanding our protocol, have good security findings and worked with us on the fixes. Mikerah and Manish are some of the best ZK auditors in the industry. I highly recommend ZK protocols doing audits with HaskCloak." Zhe Wang - Founder of Privacy Cash SERVICES 01 What we create is built to protect Our services are crafted to turn confusing cryptography buzzwords into concrete and tangible security guarantees made with precision and rigor. Security Auditing Comprehensive security reviews for cryptographic protocols, smart contracts, and blockchain infrastructure. Bespoke R&D Custom research and implementation of cutting-edge cryptographic solutions for blockchain projects. Concierge Advisory Direct access to our team of cryptographers and researchers for ongoing support and consultation. PROJECTS 02 Work that quietly speaks for itself We shape each collaboration to make complex systems safer and simpler to trust. distributed-blockbuilding 2021 distributed-blockbuilding 2021 zk-mpc-ml 2025 zk-mpc-ml 2025 ')"> ')"> ')"> ')"> Trusted by teams building with privacy and security in mind. PROCESS 03 We guide every engagement through uncertainty to confidence From first scope to final verification, we bring structure, rigor, and accountability to every engagement. Understand the System We clarify the architecture, goals, and security assumptions before we begin Do the Work We audit critical paths, develop new components, and strengthen the parts that matter most. Land the Outcome We verify outcomes, document clearly, and support your team through launch and beyond. Clarity before anything else Answers to common questions about how we work and what to expect. What does HashCloak specialize in? HashCloak is a cryptography-focused R&D lab and security consultancy specializing in zero-knowledge systems, multi-party computation (MPC), threshold cryptography, secure key management, and blockchain protocol security. Are you just auditors? No. We are builders first. We design cryptographic systems, implement advanced primitives, integrate novel schemes into production environments, and audit them with the mindset of engineers who have built similar systems ourselves. What kinds of audits do you perform? Smart contract audits ZK circuit audits (Plonky2, Halo2, Noir, Circom, etc.) Protocol design audits Cryptographic primitive audits Governance mechanism reviews Bridging and interoperability audits VM-level audits Do you audit zero-knowledge systems? Yes, We have experience auditing both the primitives used to construct zero-knowledge systems and their implementations. What does “Bespoke R&D” mean? HashCloak isn't just any cryptography firm. We help teams orientate themselves around cryptography in order to build better products for their users. Clarity before anything else Answers to common questions about how we work and what to expect. What does HashCloak specialize in? HashCloak is a cryptography-focused R&D lab and security consultancy specializing in zero-knowledge systems, multi-party computation (MPC), threshold cryptography, secure key management, and blockchain protocol security. Are you just auditors? No. We are builders first. We design cryptographic systems, implement advanced primitives, integrate novel schemes into production environments, and audit them with the mindset of engineers who have built similar systems ourselves. What kinds of audits do you perform? Smart contract audits ZK circuit audits (Plonky2, Halo2, Noir, Circom, etc.) Protocol design audits Cryptographic primitive audits Governance mechanism reviews Bridging and interoperability audits VM-level audits Do you audit zero-knowledge systems? Yes, We have experience auditing both the primitives used to construct zero-knowledge systems and their implementations. What does “Bespoke R&D” mean? HashCloak isn't just any cryptography firm. We help teams orientate themselves around cryptography in order to build better products for their users. Clarity before anything else Answers to common questions about how we work and what to expect. What does HashCloak specialize in? HashCloak is a cryptography-focused R&D lab and security consultancy specializing in zero-knowledge systems, multi-party computation (MPC), threshold cryptography, secure key management, and blockchain protocol security. Are you just auditors? No. We are builders first. We design cryptographic systems, implement advanced primitives, integrate novel schemes into production environments, and audit them with the mindset of engineers who have built similar systems ourselves. What kinds of audits do you perform? Smart contract audits ZK circuit audits (Plonky2, Halo2, Noir, Circom, etc.) Protocol design audits Cryptographic primitive audits Governance mechanism reviews Bridging and interoperability audits VM-level audits Do you audit zero-knowledge systems? Yes, We have experience auditing both the primitives used to construct zero-knowledge systems and their implementations. What does “Bespoke R&D” mean? HashCloak isn't just any cryptography firm. We help teams orientate themselves around cryptography in order to build better products for their users. —— Stay connected with thoughtful updates on our work, research process, and the ideas that shape everything we do. Join our newsletter and receive occasional insights from our team.