What is a Layered Security Approach?
Layered security stacks independent controls so one failure doesn’t sink the ship. Device intelligence, network reputation, behavioral biometrics, document checks, liveness, step‑up MFA, rate limits, graph analytics—each covers gaps the others miss. Attackers adapt; layers make adaptation expensive.
Design rules: diversify signals, avoid single points of truth, and route decisions through strategies that return approve, challenge, hold, or decline with reasons. Calibrate per risk tier so good users glide. Log everything—inputs, thresholds, outcomes—so you can defend declines and improve approvals.
