Prevent account takeovers by binding session tokens to hardware-backed keys and implementing DPoP-inspired proof of possession. In  Part 8 , we hardened the network pipe. But what if an attacker steals a valid session token directly from a compromised device or via a sophisticated phishing attack? In a  Zero Trust  architecture, we stop trusting the session token as a standalone proof of identity. Instead, we treat every request as potentially hostile until it passes a multi-factor “Risk Check.” Today, we implement the ultimate defense against Account Takeover (ATO):  Device Binding & Intelligent Risk Signals. 🔐 The Core Concept: Session ≠ Device The traditional approach is binary: If the request has a valid  Bearer  token, let it through. The  Senior Approach  is rigorous: A token is only valid if it is presented by the  exact  hardware to which it was originally issued. ⚡ TL;DR The Problem:  Token theft (Sidejacking), w...