Banking-Grade Credential Stuffing: The Futility of Partial Password Validation

This post analyzes the security implications of partial password validation, demonstrating its ineffectiveness against credential stuffing attacks. It simulates password breaches using breached password databases and analyzes the number of repeated logins required to fully compromise a password. The post advocates for multi-factor authentication (MFA) as a superior security measure, discussing the pros and cons of various MFA methods like SMS OTPs, authenticator apps, and hardware tokens.