DPoP (Demonstrating Proof-of-Possession)
Understand DPoP, a mechanism that cryptographically binds access tokens to the client, enhancing token security and preventing token exfiltration.
What is DPoP?
Welcome! Today we'll explore DPoP, which stands for Demonstrating Proof-of-Possession. It's a crucial security enhancement for OAuth2 and OpenID Connect.
DPoP helps prevent a major security risk: stolen access tokens. It ensures that only the legitimate client (the app) can use an access token.
The Token Theft Problem
Imagine an attacker steals an access token. Without DPoP, they could use this token to access your protected resources, impersonating the legitimate client.
This 'token exfiltration' is a significant vulnerability. Standard bearer tokens don't inherently prevent this because anyone who 'bears' (possesses) the token can use it.
All lessons in this course
- FAPI & Financial-grade APIs
- DPoP (Demonstrating Proof-of-Possession)
- Continuous Access Evaluation Protocol (CAEP)
- Pushed Authorization Requests (PAR)