- What it is
- A lockdown browser is an application-layer exam client that restricts what a single browser window can do during an assessment — disabling navigation, copy-paste, new tabs, and common in-browser distractions.
- Why it matters
- Lockdown browsers defined the last generation of remote exam defense, but they are architecturally limited to the process they run in and cannot observe the rest of the candidate's operating system.
- Where Aiseptor fits
- Aiseptor replaces the lockdown-browser layer with a network-and-device substrate that secures the whole machine: invisible overlays, remote-access tools, and local language models are all outside a browser's reach, but inside Aiseptor's.
Canonical definition
A lockdown browser is a purpose-built web browser or browser extension that enforces a restricted interaction model during an online exam. Typical controls include blocking browser tabs and new windows, disabling copy and paste, limiting keyboard shortcuts, suppressing on-screen notifications, and preventing navigation away from the assessment URL. The category was defined by tools aimed at academic testing centers in the 2010s and is still widely deployed for certification and classroom exams. Its architectural limitation is fundamental: a lockdown browser is one process on a machine that runs many, and it cannot see what happens in the operating system around it — other running applications, overlay surfaces marked excluded from capture, remote-control tunnels, or locally hosted AI models. Lockdown browsers remain useful for low-risk contexts but are no longer sufficient on their own for high-stakes assessments.
Citations
- [1]Aiseptor architecture whitepaper (public version) (2026)
- [2]Talview AI Threat Index Report 2026 (2026)