We build privacy-first solutions for blockchains and beyond

We build privacy-first solutions for blockchains and beyond

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.

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.

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.

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