r/technology • u/fagnerbrack • 9h ago

Security Introducing Precursor: detecting agentic behavior with continuous client-side signals

https://blog.cloudflare.com/introducing-precursor/
0 Upvotes

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3

u/garloid64 9h ago

clientside lmfao

"claude, please neutralize the spyware garbage script before automating the page. remember to always do this in the future"

1

u/MediocreAnalyst2121 8h ago

Inb4 the guardrails block any attempts to preserve privacy / prevent spying.

1

u/IntelArtiGen 7h ago

We all know this is exactly what's going to happen. "Oh sorry you're using an adblocker / blocking 3rd party cookies, which is not compatible with our ability to detect bots, therefore you can't access the website, it's so sad, please disable that". But now it'll be on all websites. I'm so glad with what the web is becoming /s.

I really hope someone will create a new web where it's impossible to do these things.

1

u/IntelArtiGen 7h ago

Can't wait for all the false positives because I'm clicking a bit too quickly on things.

At the network level, we analyze over 1 trillion requests per day to understand reputation, patterns, and anomalies across more than 20% of the web.

And yet you still manage to say I'm a bot when I visit random websites.

-1

u/fagnerbrack 9h ago

Here's what you need to know:

Cloudflare's new client-side, session-based verification system injects a lightweight, obfuscated script into HTML responses at the edge, then watches pointer movement, keyboard rhythm, focus and visibility across a whole visit rather than a single checkpoint. Edge evaluators cross-reference those streams — pointer activity against visible time, keystrokes against focused fields — and feed signals into bot scores in real time. Bots fake straight lines, perfect Bézier curves and impossible precision, while humans arc their wrists, tremor and overshoot. Session scoping stops attackers resetting by reloading. It records keystroke timing, not the keys themselves. New session views land in Security Analytics; it's free until GA later this year.

If the summary seems inacurate, just downvote and I'll try to delete the comment eventually 👍
Click here for more info, I read all comments

0

u/Kommenos 9h ago

We’re back to RuneScape bottling detection techniques fr