11.1 Passwordless SaaS Login
How PTERI is applied in real systems
This section shows how PTERI’s single trust model is applied across different scenarios, without changing primitives or introducing special cases.
Each use case uses the same flow: Wallet → Signature → Verification → Outcome
Problem
Traditional SaaS login relies on:
- Passwords
- Email resets
- MFA add-ons
These increase friction and expand the attack surface.
PTERI Approach
- User requests login
- Backend issues a challenge
- Wallet signs the challenge
- Backend verifies and issues session/JWT
There are:
- No passwords to store
- No recovery emails
- No OTP codes
Login becomes a cryptographic proof of authority.