Cryptographic Assurance, From Proofs to Production
From mathematical soundness to implementation security. We audit ZK proofs, MPC protocols, FHE schemes, and post-quantum cryptography with the rigor your security demands.
Trusted by leading protocols
Cryptography Expertise for Privacy-Preserving Systems
Our team brings decades of experience in verifiable credentials, authentication protocols, and privacy-preserving cryptography to secure your most critical systems.
Pioneering Work in Digital Identity & Authentication
Dr. Medvinsky brings over 20 years of pioneering experience in cryptographic systems, with deep expertise in verifiable credentials, privacy-preserving authentication, and quantum-resistant cryptography. As a principal architect at Microsoft, he contributed foundational work to Kerberos and TLS protocols, co-authoring RFC 2712 which added Kerberos cipher suites to Transport Layer Security.
His expertise is particularly relevant for modern privacy-preserving identity platforms requiring secure credential delegation, multi-party authentication, and zero-knowledge proof systems. With 9 U.S. patents covering authentication protocols, credential management, and secure data storage, Dr. Medvinsky has directly shaped how modern systems handle identity verification and access control.
Identity & Credentials
- •Verifiable credential systems
- •Privacy-preserving authentication
- •Credential delegation protocols
- •Single sign-on architectures
Advanced Cryptography
- •Zero-knowledge proof systems
- •Quantum-resistant cryptography
- •Multi-party authentication
- •Cryptographic protocol design (RFC author)
Notable Contributions
Kerberos Cipher Suites for TLS
Authentication & Cryptographic Systems
Cryptography & Security Research
Principal Security Architect
Security at Every Layer
Cryptographic vulnerabilities can exist at any level. We examine math, protocol, code, and hardware to ensure nothing is missed.
Mathematical Foundations
Formal verification of cryptographic assumptions, hardness proofs, and security reductions.
Protocol Design
Analysis of protocol composition, message flows, and adversarial model coverage.
Implementation Security
Code review for timing attacks, memory safety, and cryptographic API misuse.
Hardware & Side-Channels
Assessment of TEE integration, HSM usage, and physical attack resistance.
Your Cryptography Stack, Verified End-to-End
From zero-knowledge proofs to post-quantum cryptography, we audit the complete spectrum of modern cryptographic systems.
Zero-Knowledge Proofs
Multi-Party Computation
Homomorphic Encryption
Post-Quantum Cryptography
Classical Cryptography
Hash Functions & Primitives
Cryptography Expertise You Can Trust
Led by Dr. Ari Medvinsky (Ph.D. in Cryptography), our team includes published cryptographers and RFC authors with deep expertise in formal methods, protocol analysis, and real-world attack research. Dr. Medvinsky's work on authentication protocols and verifiable credentials directly addresses the security challenges facing modern privacy-preserving systems.
Audit Process
Scoping
Define scope based on your cryptographic scheme, threat model, and compliance requirements.
Mathematical Review
Verify security assumptions, proofs, and reductions with formal methods.
Protocol Analysis
Examine protocol composition, message flows, and adversarial scenarios.
Implementation Audit
Code review for constant-time operations, RNG quality, and API misuse.
Hardware Assessment
Evaluate side-channel resistance, TEE usage, and physical attack surfaces.
Reporting & Re-test
Deliver findings with standards mapping, then verify all remediations.
What You Get After the Audit
Clear, actionable deliverables that satisfy partner due diligence and accelerate your path to production.
Prioritized Findings Report
Severity-ranked vulnerabilities with exploitation paths, PoCs, and remediation guidance.
Standards Compliance Matrix
Findings mapped to NIST, FIPS, ISO 27001, and CFRG standards for regulatory alignment.
Evidence Package
Proof-of-concepts, test vectors, benchmarks, and reproduction steps for all findings.
Re-test & Certificate
Remediation validation with dated attestation for stakeholders and partners.
Frequently Asked Questions
A cryptography audit is a specialized security assessment that examines cryptographic systems at multiple layers: mathematical foundations, protocol design, implementation correctness, and hardware/side-channel resistance. Unlike general security audits, cryptography audits require deep expertise in number theory, algebra, and formal methods to identify subtle flaws that could compromise the entire system.
We audit the full spectrum of modern cryptography: zero-knowledge proof systems (zkSNARKs, zkSTARKs, Plonk, Halo2), multi-party computation protocols, fully homomorphic encryption schemes, post-quantum cryptography implementations, classical primitives (ECDSA, BLS, AES), and ZK-friendly hash functions. Our team has hands-on experience with production deployments across all these domains.
Duration depends on complexity. A focused review of a single cryptographic primitive typically takes 2 to 4 weeks. Comprehensive audits of ZK circuits or MPC protocols usually require 4 to 8 weeks. Full-stack assessments covering multiple cryptographic components may take 8 to 12 weeks. We provide detailed timelines during scoping.
No, they are complementary. A smart contract audit focuses on business logic, access controls, and Solidity/Rust-specific vulnerabilities. A cryptography audit examines the underlying cryptographic primitives, proofs, and protocols. Projects using ZK proofs, threshold signatures, or custom cryptography typically need both types of audits.
Yes. We map all findings to relevant standards including NIST SP 800-series, FIPS 140-3, ISO 27001, and CFRG recommendations. This documentation helps satisfy due diligence requirements from partners, exchanges, and regulators, and accelerates compliance processes.
Cryptographic code can be syntactically correct but mathematically broken. Issues like incorrect curve parameters, missing domain separation, or flawed proof composition require specialized knowledge to detect. Our auditors combine formal methods expertise with practical attack experience to find vulnerabilities that general security tools miss.
Yes. Our team has deep expertise in verifiable credential systems, privacy-preserving authentication, and digital identity protocols. Led by Dr. Ari Medvinsky, who holds multiple patents in authentication delegation and credential management and co-authored RFC 2712 for Kerberos/TLS integration, we understand the unique security challenges of privacy-preserving identity platforms. We audit credential issuance, verification protocols, zero-knowledge proof systems for selective disclosure, and the cryptographic foundations that enable secure, privacy-preserving identity verification.
Ready to Secure Your Cryptography?
Get a comprehensive cryptography audit from our team of PhD-level cryptographers and security researchers.