Why passwordless: the problem PTERI is solving

Almost every account-takeover, phishing, and credential-stuffing incident traces back to the same design flaw: a reusable secret that can be typed, copied, or intercepted — a password, an OTP code, a session token, an API key sent as a bearer credential.

What this causes in practice

• Phishing pages that just ask for the password or OTP directly
• Credential stuffing — reused passwords tested across many sites
• Session hijacking — steal the token, skip the login entirely
• "Trust once, allow forever" — an approved session can keep acting long after the human stopped paying attention, including being handed off to an AI agent with no re-verification

PTERI's approach

Remove the reusable secret entirely. Every sign-in and every sensitive action is a fresh, single-use cryptographic signature tied to that exact moment and that exact action — there's nothing for a phishing page to capture that would be useful anywhere else.