Privacy-Preserving Access Control Systems

Implement zk-SNARKs and zk-STARKs for private credential verification and transaction validation. Our systems enable selective disclosure, allowing users to prove eligibility without revealing sensitive data, ensuring compliance with regulations like GDPR and MiCA.

Deploy non-custodial MPC-based wallet infrastructure for decentralized key management. Eliminate single points of failure for institutional assets with threshold signatures, enabling secure, gas-efficient transaction signing without exposing private keys.

Build systems for anonymous voting, reputation, and signaling using Semaphore and Rate-Limiting Nullifiers (RLN). Prevent Sybil attacks while preserving user anonymity, ideal for DAO governance and private feedback mechanisms.

Develop dynamic, on-chain policy engines that grant access based on verifiable credentials, token holdings, or reputation scores. Our ABAC systems provide fine-grained, auditable control over smart contract functions and gated content.

Architect hybrid storage solutions combining on-chain commitments with off-chain encrypted data. Utilize frameworks like Aztec, FHE, or custom rollups to manage private application state with guaranteed data availability and integrity.

Automate the generation of privacy-preserving audit trails for regulators. Our systems produce verifiable, zero-knowledge proofs of compliance for transaction patterns and user eligibility without exposing underlying user data.

We begin with a collaborative design session to map your data flows, define privacy requirements, and identify potential attack vectors. This results in a formal threat model and a technical specification for your zero-knowledge (ZK) or secure multi-party computation (MPC) system.

Our team engineers the core cryptographic logic using frameworks like Circom, Halo2, or zk-SNARKs/STARKs libraries. We focus on gas efficiency for on-chain verification and computational efficiency for off-chain proving.

Every cryptographic circuit and smart contract undergoes rigorous review. We employ static analysis, manual expert review, and, where applicable, formal verification tools to ensure mathematical correctness and resilience against exploits.

We provide a clean, well-documented SDK (TypeScript/Go) and smart contract interfaces for easy integration into your application. This includes comprehensive documentation, example implementations, and developer support.

We deploy the complete system to a staging environment that mirrors your production setup. This phase includes load testing, integration testing with your frontend, and a final security review before mainnet launch.

We manage the mainnet deployment and establish monitoring for key metrics: proof generation times, gas costs, and system health. We provide ongoing support and are available for protocol upgrades or optimizations.