Lethal Trifecta Guard, explained for beginners

Lethal Trifecta Guard blocks the moment an AI agent session could read attacker text, see private data and send it out, all at once.

What it is

Security researchers call it the lethal trifecta: an AI agent that (1) reads untrusted content (a web page, an email, a public ticket), (2) can see private data, and (3) can send things out (email, web requests, images). Any one is fine. All three in one session means an attacker's text can make the agent leak your data.

The guard tracks which of the three each session has picked up. When a step would complete the trifecta, it is blocked. It also recognises your private records inside outgoing messages, even when hidden (for example base64), and allows normal work such as sending an internal report to your own domain.

An everyday comparison

A bank vault rule: a visitor, the vault key and an open back door are never allowed in the same room at the same time.

How it works, in 4 steps

1. Every step is labelled: untrusted input, private data, or a way out.
2. The guard tracks what the session holds.
3. A step that would complete all three is blocked.
4. Private records are recognised in outgoing data, even disguised.

Try it now

Open the six live demo tools → Every button sends a real request to the live product and shows the real answer.

See it on the homepage: Lethal Trifecta Guard section →

Who it is for

Any company whose agents read outside content and can also see private data and send messages: support, sales, coding, email assistants.

FIRME AI CORPORATION · CAIN-42 is a Byzantine trust fabric. Numbers marked "our own check" were run by us, not by an independent party. Nothing on these pages is a certification.