Ship high-stakes features
without the anxiety.
One logic bug can cost millions in losses and reputation. We use formal methods and exhaustive testing to prove your critical systems will behave correctly, and stay that way as you ship.
Provide audit-grade evidence that your critical systems satisfy formal security properties.
Systematically de-risk your core business logic so your team can ship with confidence.
Engagement Models
Paid Triage:
Rapid Risk Review
Low-friction architectural review to identify red flags.
- • Logic gap analysis
- • State-space complexity map
- • Next-step scope + quote
Conformance Sprint
Hardening specific modules with formal rigor and remediation guidance.
- • Formal Lean 4 Spec
- • Diff-Fuzzing Suite
- • Conformance report + guidance
- • Verification Badge
- • Optional remediation support
Advisory Retainer
Ongoing access for incident response and review.
- • PR reviews & design
- • Incident response
- • Oracle upkeep (model + fuzz suite)
- • Priority availability
METHODOLOGY: THE GOLDEN ORACLE
The Model (Lean 4)
We define your critical business invariants in a formal theorem prover. This acts as the mathematical source of truth against which all code is judged.
The Stress Test
We use differential fuzzing to generate millions of inputs. Any deviation detected between your code and the model produces a reproducible counterexample.
The Regression Gate
We deliver the Oracle and Fuzzing Suite to your CI/CD. It runs on every commit, ensuring that your proven safety properties remain intact as the code evolves.
COMMON_QUERIES
Can you work under NDA?
Yes. We regularly handle sensitive IP and unreleased protocols. Attribution is optional.
Is the team remote?
Yes. We are remote-first, based in Melbourne (UTC+11), serving clients globally (async + overlap windows).
We require security clearance. Can you help?
Yes. Our team members hold baseline security clearance (AU) and can onboard to cleared projects.
Do you really do fixed-price?
Yes, for Scoped Audits and Triages. We prefer outcome-based billing over hourly counting.
Latest research notes
Practical writeups on audits, verification, and secure systems engineering.
Verified Model-Based Conformance Testing for Dummies
How a small, proved model plus a differential fuzzer catches deep logic bugs normally missed by tests.
Lean for Security Proofs, Part 3: Enforcing the Proof in Rust
A minimal Rust system that mirrors Lean invariants and keeps them enforced in code and tests.
The $220 Million Rounding Error: Why "Security" Failed Cetus (and How to Fix It)
A postmortem-style breakdown of how rounding, invariants, and unchecked assumptions turn into catastrophic losses.
Fuzz Testing Playbook: Finding Security Bugs Before Attackers Do
An in-depth guide to building high-signal fuzzing programs for security-critical systems.
Zero-Knowledge Circuits: Verification Checklist for Production Teams
A practical, production-minded checklist for verifying ZK circuits before deployment.