Masked Calls, Explained: How SECQRE Keeps Your Number Invisible
A behind-the-scenes look at the relay tech, the OTP gates, and the call-budget limits that stop spam before it starts.
When someone scans your SECQRE QR, they land on a public 'Contact owner' page. They press Call. Our system spins up a one-time bridge: a temporary inbound number on their side, a private routing rule on yours. Audio flows through the bridge, never directly.
We cap each call at 90 seconds. We rate-limit per device, per IP, and per scan event. We let you instantly block a caller from your app. Spammers don't get a foothold — and you don't get woken up at 3 a.m. by a wrong number.
The result is the rarest thing on the modern internet: a way for strangers to reach you when it really matters, and nothing more.
Written by Engineering at SECQRE · Oct 28, 2025