Adaptive Login Throttling: Brute-Force Defense Simulator

Personal-computer and account security rarely comes down to one dramatic exploit — it comes down to boring, consistent policy enforcement at the login gate. This simulator renders that policy in 3D: simulated credential-guess attempts stream toward an authentication gate at a rate you control, and an exponential-backoff rate limiter decides, attempt by attempt, whether to even evaluate them. Each failure widens the delay before the next attempt is allowed exponentially, visualized as a closing red barrier at the gate, while live readouts track the current backoff delay, the consecutive-failure counter against its lockout threshold, and how many attempts were blocked outright versus actually evaluated. Tune the attacker's rate and the credential's entropy against the defender's base delay and lockout threshold to see how quickly — or slowly — a sustained brute-force attempt gets throttled to a standstill.