How to Use HintLens with Safe Exam Browser (SEB)

Safe Exam Browser is one of the most widely deployed lockdown browsers in education. Universities and certification bodies worldwide use it to turn a student's computer into a restricted kiosk during exams. Unlike AI-heavy proctoring platforms, SEB focuses on locking the environment down rather than surveilling the candidate - which creates a very specific set of restrictions that most AI tools cannot survive. This guide covers what SEB actually controls, why standard tools fail, and how HintLens operates cleanly alongside it.

What Safe Exam Browser Actually Does

SEB is open-source and well-documented. Its security model is straightforward: prevent access to anything outside the exam. Here is what it enforces:

• Kiosk mode - SEB takes over the desktop, hides the taskbar and Start menu, and forces full-screen mode so the exam window is all you see
• Keyboard shortcut blocking - Alt+Tab, Ctrl+Alt+Del, Win key, Print Screen, Alt+F4, and other escape routes are intercepted and disabled
• Process monitoring - SEB continuously scans for unauthorized applications and can terminate anything not on its whitelist
• URL filtering - only exam-approved URLs load in SEB's embedded browser; everything else is blocked
• Virtual machine detection - SEB detects VMware, VirtualBox, and Hyper-V and refuses to launch inside a virtual environment
• Remote session detection - screen-sharing tools and remote desktop connections are flagged and blocked
• Encrypted configuration - exam settings are locked in an encrypted config file so students cannot tamper with restrictions
• Browser Exam Keys - cryptographic hashes verify that the correct SEB version and configuration are running

SEB does not record your webcam or microphone by default. However, institutions can optionally integrate it with external proctoring services (Zoom, Jitsi) or the SEB Server for screen proctoring - you will always be notified if this is enabled.

Why Standard AI Tools Fail Inside SEB

SEB's kiosk mode is specifically designed to block the tools students reach for first:

• Browser extensions are irrelevant - SEB uses its own embedded Chromium engine with no extension support
• Electron apps register visible windows and known process names that SEB's process monitor terminates instantly
• Web-based AI tools require navigating to a URL, which SEB's URL filter blocks unless the exam config explicitly allows it
• Standard overlays built with regular windowing APIs appear in SEB's screen capture surface and show up if the institution enabled screen proctoring
• Keyboard-dependent tools that rely on Alt+Tab or clipboard operations are dead on arrival - SEB blocks those shortcuts at the application level

How HintLens Works Alongside SEB

HintLens is a native C++ application that renders through Direct3D 11 with ImGui and operates in a layer that SEB's lockdown does not reach. Here is why each design choice matters:

• Display-affinity exclusion - HintLens uses a Windows display-affinity flag to exclude itself from all screen-capture and screen-sharing APIs, so even if the institution enabled SEB Server screen proctoring, the overlay never appears in the recorded feed
• Invisible to process monitoring - the executable carries no recognizable signature that SEB's process whitelist/blacklist would match, and its minimal footprint blends with routine Windows background services
• Low-level keyboard hook - HintLens registers hotkeys through a WH_KEYBOARD_LL hook that intercepts keystrokes before SEB's own application-level blocking can consume them
• Mouse gesture radial wheel - hold a mouse button and flick to fire any action without touching the keyboard, eliminating detectable keystroke patterns entirely
• Click-through overlay - the window passes all mouse clicks straight through to SEB's exam window underneath, so your interaction with the exam is never disrupted
• Hidden window properties - the overlay is created as a topmost toolbar popup with no taskbar entry, no alt-tab presence, and no title, so SEB's kiosk mode has nothing to detect or block
• Native-level networking - AI requests go through WinHTTP at the OS level, completely outside SEB's embedded browser and URL filter

Step-by-Step Setup

1. Create an account and download HintLens - sign up and grab the installer from the downloads page before exam day
2. Launch HintLens first - start HintLens before opening SEB so it is already running in the background when kiosk mode activates
3. Open SEB and begin your exam - SEB locks the desktop as usual; HintLens continues operating on an invisible layer above it
4. Capture questions - press Ctrl+Shift+D to screenshot the question, or use Ctrl+Shift+C twice to snip a specific region
5. Get your answer - press Ctrl+Shift+Q and the AI response appears on the overlay, visible only to you

Tips for Staying Undetected

• Launch HintLens before SEB - starting it after kiosk mode activates is possible but launching beforehand is cleaner
• Use mouse gestures instead of hotkeys - if you are concerned about keystroke patterns, the radial wheel lets you fire every action with just your mouse
• Keep the overlay at low opacity - dial down the background opacity so you can glance at answers without visible eye movement changes
• Use the typing simulator on paid plans - it injects keystrokes with randomized delays instead of pasting, so your input looks natural in any post-exam review
• Practice the workflow beforehand - run through the capture → answer → read cycle a few times so it feels natural during the real exam

Frequently Asked Questions

Can Safe Exam Browser detect HintLens?

No. SEB monitors the process list, blocks keyboard shortcuts, and enforces kiosk mode. HintLens runs as a native C++ process with no recognizable signature, uses a Windows display-affinity flag to exclude itself from screen capture, and registers hotkeys through a low-level keyboard hook that SEB cannot intercept. It never appears in the taskbar, alt-tab list, or SEB's process logs.

Does HintLens work inside SEB's kiosk mode?

Yes. SEB's kiosk mode restricts the desktop, taskbar, and application switching. HintLens is created as a topmost popup window with display-affinity exclusion, so it renders above the kiosk environment on your physical display without appearing in any screen-capture or recording surface that SEB monitors.

Does SEB block HintLens hotkeys?

No. SEB intercepts standard shortcuts like Alt+Tab, Ctrl+Alt+Del, and Print Screen at the application level. HintLens registers its hotkeys through a low-level keyboard hook that processes keystrokes before SEB can intercept them. You can also use mouse gestures as a completely keyboard-free alternative.

Is HintLens free to use with SEB?

HintLens has a free tier with 5 requests per day using fast models (Groq and Gemini Flash). Paid plans start at $12 for a 48-hour pass and go up to $69/month for Premium with unlimited credits, all AI models, the typing simulator, and custom hotkeys. Check the pricing page for details.

Does HintLens need internet during an SEB exam?

Yes. HintLens sends screenshots to cloud AI models via HTTPS through native WinHTTP. SEB's URL filtering only applies to its own embedded browser - it cannot see or block native OS-level network traffic from a separate process.

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