Website vs Device Defenses: How to Build a Modern Account Takeover Solution
Most account takeover solutions are built on a familiar assumption: if you can trust the device and secure the login, you can stop fraud. That assumption is no longer valid. Modern account takeover failures are driven by a structural issue most defenses still miss: the legitimacy gap. This is the period when access is treated as legitimate even though compromise has already occurred. During this gap, attackers operate freely while security and fraud teams see nothing actionable.