AI is finding
vulnerabilities
faster than humans
can patch them.

Autonomous AI systems are now discovering zero-day vulnerabilities and writing working exploits at machine speed. Implementation-level bug hunting is being automated. The security that survives this shift is upstream: protocol architecture, cryptographic design, and threat modeling. That is exactly what we do.

Book a call → Send an email

$ symbolic --engagement ~5 WEEKS

[wk 1]scopingrequirements, surfaces, threat model

[wk 2]design_reviewprotocol, primitives, key mgmt

[wk 3]code_reviewimplementation fidelity, side channels

[wk 4]draft_reportfindings, severity, remediation

[wk 5]▶ deliveryfinal report · retest if needed

typical · most engagements 4–6 weeks · custom scope on request

What you get.

5 dimensions · senior cryptography expert · not a scanner report

01 / Architecture

Protocol architecture review

Key exchange, authentication flows, session management, state machines — evaluated before the first line of implementation.

02 / Primitives

Cryptographic design audit

Primitive selection, parameter choices, composition of schemes, and whether your threat model matches reality.

03 / Code

Implementation verification

Detailed code review across Go, Rust, TypeScript, Swift, Java, .NET, C, Solidity — verifying that the design was correctly realized.

04 / Post-quantum

PQ readiness assessment

Migration assessment for systems that need to survive the next decade of cryptanalytic advances.

05 / Verification

Formal verification

Machine-checked proofs of protocol correctness, using the most appropriate verifier for your target.

Trusted by

What clients say.

A few of the people we've worked with

We have been working together with Symbolic Software as auditors for cryptographic software. They are reliable, precise, honest, thorough and think outside the box.

— Mario Heiderich, Director, Cure53.

Symbolic Software is run by an accomplished researcher, with significant contributions in the area of applied cryptography. They're the right team for projects that require rigorous design and engineering.

— Jean-Philippe Aumasson, Chief Security Officer, Taurus Group.

Symbolic Software are a delight to work with. Their reports are incredibly thorough and they maintain an excellent line of communication. We are grateful we got the opportunity to collaborate with someone of such high calibre.

— Vishnu Mohandas, Founder, Ente.io.

Why us.

An applied cryptography practice — not a generalist penetration testing firm. Each engagement led by a senior cryptography expert, not delegated to an analyst running scanners.

Engagements 250+ completed engagements spanning password managers, encrypted messaging, digital wallets, VPNs, authentication frameworks, and smart contracts.

Named clients 1Password, Mozilla, Coinbase, Zoom, Bitwarden, Dashlane, NordVPN, ExpressVPN, MetaMask, and the Linux Foundation — among the public-report engagements.

Open-source tooling Verifpal (formal verification), Crucible (post-quantum conformance testing), hpke-ng (RFC 9180 + hybrid PQ), Kyber-K2SO (ML-KEM in Go), the PQ Migration Playbook.

Published research Peer-reviewed work on cryptographic protocol analysis and formal verification — including the libcrux audit papers and the OSTIF talk on disclosure ethics.

Ready to start?

We scope the work together, agree on timeline and deliverables, and get going.