TwistedFN Solutions
Application security
Secure code review, threat modeling and vulnerability triage across application boundaries and trust decisions.
Cybersecurity & product engineering
Secure software, from attack surface to verified fix.
TwistedFN Solutions LLC is an independent cybersecurity and software engineering company. We review code, validate vulnerabilities in authorized environments, and build privacy-first native apps for Apple platforms.
Authorized testingControlled researchHuman-reviewed fixes
What we do
Security work grounded in software engineering.
We connect discovery to remediation. The goal is not a longer findings list; it is a smaller, better-understood attack surface and fixes that survive re-testing.
Vulnerability validation
Controlled reproduction, evidence collection and impact analysis for findings on systems within an approved scope.
Secure networking
Encrypted transport, privacy architecture and trust-boundary analysis for clients, services and difficult networks.
Native product engineering
Privacy-first iOS and macOS software built with Swift, SwiftUI and the security controls of the platform.
Evidence before severityReproducible findings, not speculative labels.
Authorization before accessClear ownership, scope and stop conditions.
Verification after remediationRe-test the fix and document residual risk.
Method
A continuous path from signal to proof.
Every stage produces reviewable evidence and keeps the approved boundary visible.
Inventory
Map the systems, data flows and trust boundaries in scope.
Discover
Review code and behavior for weaknesses worth investigating.
Validate
Reproduce safely and separate evidence from assumption.
Remediate
Turn the root cause into a focused patch or control change.
Verify
Re-test the fix, record the result and close the loop.
Research boundary
Capability needs control.
Security research is performed only on systems we own or are explicitly authorized to assess. Automation accelerates analysis; it does not replace scope, judgment or accountability.
- Approved assets and actions are defined before work begins.
- Research uses isolated environments and least-privilege access.
- Sensitive actions require a human checkpoint.
- Findings end in remediation, re-testing and responsible disclosure.
Product engineering
We also build the software we want to protect.
Our own product work keeps security decisions close to implementation, release engineering and support.
In development
LoopholeVPN
A privacy-focused VPN for iPhone and Mac, built around modern encrypted transports, a simple connection experience and a strict no-traffic-logs design.
Have a defined security problem?
Tell us what you own, what is in scope and what outcome you need. We will respond with the right next question.