# Welcome to the official developer documentation and API reference
1.1 The Problem We Are Solving
The internet was designed to move **information**, not **value**, and not **identity**.
As a result, identity was never built into the protocol layer. Instead, it was added later using convenience mechanisms:
* Passwords
* Email inbox access
* SMS phone numbers
* Centralized identity databases
These mechanisms were never meant to represent *who someone is*.\
They only represent *what someone knows* or *what they can access*.
#### The core flaw
All Web2 identity systems rely on **shared secrets**.
> If a secret can be typed, it can be phished.\
> If it can be stored, it can be breached.\
> If it can be forwarded, it can be replayed.
This is not an implementation problem — it is a **structural limitation**.
Once a secret is copied, the system has no cryptographic way to distinguish:
* The legitimate user
* A stolen credential
* An automated attacker
**PTERI exists to replace shared-secret trust with cryptographic proof of authority.**
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