New · Security-focused Browser
A desktop browser that scores every site you visit, explains what it finds in plain language, and remembers the sites you trust.
Currently in early access · Desktop first · Mobile & store releases in progress
Security Engine · Live View
Current Site
https://example.com
Security Score: 18Risk Level: Low
Threat Insight
No hostile patterns detected. Scripts and iframes behave within expected norms for this profile.
Adaptive Profile
Profile: Trusted · 12 visits · Stable behavior over time.
Cyber-Circuit treats every navigation as a security event. Pages are scored with classical security checks, the findings are explained in plain language, and the result is recorded in a per-site profile kept on your device. Instead of passively rendering whatever arrives over the network, the browser continuously asks: “Is this safe, and what is it trying to do?”
What it is
What is Cyber-Circuit Browser?
Cyber-Circuit is a security-focused browser that treats security as an ongoing check instead of a static checklist. Where traditional browsers focus on rendering pages, Cyber-Circuit focuses on scoring each site, explaining the risk it finds, and remembering how a site has behaved for you before.
Checks Beyond the Padlock
A valid certificate is not the whole story. Cyber-Circuit checks TLS posture, downgrade risks, and structural oddities in a page — hidden iframes, unusual scripts, and unexpected embedded content — and surfaces what it finds instead of silently loading it.
Explanations, Not Just Banners
Instead of opaque “this site is dangerous” banners, Cyber-Circuit explains why a page was flagged — hidden iframes, suspicious scripts, privilege abuse, data-harvesting behavior and more — so you can judge the warning yourself.
A Browser That Remembers Sites
Cyber-Circuit keeps a per-site profile on your device: visit counts, past scores, and the trust classification you and the browser have built up over time. Repeat visits to stable, trusted sites produce less noise; a site whose behavior changes stands out.
What it adds
Three checks mainstream browsers don’t surface
01
Security Scoring
Classical anomaly and entropy checks score each site as it loads. The engine evaluates TLS posture, downgrade vectors, and structural oddities, and combines them into a single score you can inspect.
02
Explainable Threat Checks
On-device, rule-based checks flag patterns associated with phishing, malvertising, and data-harvesting behavior — and show the indicators behind the flag. No browsing history is sent to a cloud service for this.
03
Adaptive Per-site Profiles
Per-site profiles track visits, past scores, and your trust decisions. Sites are classified as Trusted, Neutral, Watchlisted, or Dangerous, and the browser adjusts how prominently it warns you accordingly. Profiles are stored on your device.
Under the hood
How Cyber-Circuit works
Cyber-Circuit doesn’t just load pages. It runs a sequence of security checks on every navigation, explains the result, and records it in the site’s profile.
Step 1
Smart Navigation Hook
Each navigation event triggers the Security Engine before the page is fully trusted, capturing URL, context and metadata so risk can be evaluated in context.
Step 2
Threat Analysis
A dedicated threat worker evaluates the site using anomaly checks and classical indicators — TLS posture, embedded content, and script behavior. The result: a unified, explainable risk profile.
Step 3
Adaptive Scoring & Experience
The score updates your per-site profile, tunes alert levels for sites you visit often, and refines how prominently Cyber-Circuit warns you as you continue to browse.
Platforms
Built for the ecosystem you actually use
Cyber-Circuit starts on desktop — where most serious work and attacks happen — and expands outward.
Available now
Windows · Native installer & portable build
Linux · .deb package & AppImage
All builds ship with the same Security Engine, threat panel and per-site profiles.
In active development
macOS · Universal binary with feature parity to Windows/Linux.
Planned store releases
Microsoft Store (Windows) · Apple App Store (iOS/iPadOS) · Google Play Store (Android).
Download
Download Cyber-Circuit Browser 1.0.0
Experience what it feels like when your browser doesn’t just render pages — it scores them, explains what it finds, and remembers them.
Windows · Installer
Recommended for most users. Installs Cyber-Circuit Browser with the full Security Engine, threat panel and per-site profiles.
Download .exeCyber-Circuit Browser-1.0.0-win-x64.exe · ~73 MB
Windows · Portable
No installer required. Ideal for USB sticks, sandbox testing or environments where you can’t modify the system.
Download Portable .exeCyber-Circuit-Browser-1.0.0-Portable.exe · ~73 MB
Linux · .deb (Debian/Ubuntu)
Native .deb package for Debian/Ubuntu-based distributions. Installs Cyber-Circuit alongside your existing browsers.
Download .debCyber-Circuit Browser-1.0.0-linux-amd64.deb · ~70 MB
Linux · AppImage
Universal AppImage for most modern Linux distributions. Make it executable and run it directly without installation.
Download AppImageCyber-Circuit-Browser-1.0.0-x86_64.AppImage · ~100 MB
Tip: chmod +x Cyber-Circuit-Browser-1.0.0-x86_64.AppImage before running.
FAQ
Frequently asked questions
Does Cyber-Circuit replace my antivirus or EDR?
No. Cyber-Circuit is designed to complement endpoint tools by catching threats at the browser edge before they ever look like a file or process. It adds per-site scoring and explanations those tools don’t see.
Does Cyber-Circuit use quantum computing, AI, or machine learning?
No — not in the current release, and we’ve removed earlier wording that suggested otherwise. Version 1.0.0 uses classical security checks, rule-based explanations, and local per-site profiles. It does not use quantum hardware, quantum-trained models, a language model, or trained ML models. If that changes, this page will say exactly what shipped, and how it was tested.
Where does my browsing data live?
Per-site profiles are stored on your device. The checks in the current release run on-device and do not send your browsing history to a cloud service.
Will this slow down my browsing?
Cyber-Circuit is engineered to run most analysis in parallel with page loading, and to reuse cached site profiles over time, so repeat visits to known sites are checked faster.
Cyber-Circuit Browser is a separate product from Cyber-Circuit, the circuit breaker for AI agents described on the home page. The post-quantum signature work proven in the lab for that product is not part of this browser.