Can you pass this captcha?

You need to do nothing to pass. But even that can be a challenge.

CAPTCHA made for Humans

How does Private Captcha work?

"Proof-of-Time" demo above is made for fun, but it's powered by the same "serious" technologies used for the "Proof-of-Work" version

Security: Duration of the demo above is not random. It is actually based on the same difficulty scalling that is used for Proof-of-Work version, just mapped into seconds, instead of hash prefix size. So if many users will try the demo, its duration will increase.
Privacy: No Personally Identifiable Information (PII) is collected here, just like the "official" version. Conventional CAPTCHAs not only collect behavioral data, but also abuse users for data labeling tasks, both without any user consent.
Inclusivity: Conventional CAPTCHAs are not only annoying, but they also can be hard for humans. With Private Captcha humans don't need to prove they are humans. All it takes is a single click, which is as user-friendly as it gets.