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Notes from the identification engine

How the persistence engine works, what breaks in practice, and the numbers behind both. Written by the people who ship it.

July 2, 2026 · Veriprint Engineering

Anatomy of a visitor ID

What is actually behind a Veriprint visitorId: three durable storage anchors, a stability-weighted signal vector, and an EMA that lets the profile drift with the device.

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June 18, 2026 · Veriprint Engineering

Why hashing browser fingerprints fails

Exact-hash browser fingerprinting mints a new visitor ID on every update. Stability-weighted fuzzy matching is how you survive Chrome's four-week release cycle.

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