A is a tool, not a "skeleton key." In the early days of the internet, a lack of rate-limiting made these lists dangerous. Today, they serve primarily as a reminder to developers: never deploy an authentication system without strict rate-limiting and short expiration windows.
| Countermeasure | Effect on Wordlist Attack | |----------------|---------------------------| | (e.g., 3 attempts per 30 seconds) | Renders full wordlist infeasible | | Account lockout after 5–10 failed OTP attempts | Blocks further tries for that user | | Short OTP validity (30–60 seconds) | Reduces brute-force window drastically | | CAPTCHA after N failures | Prevents automation | | Time-based OTP (TOTP) with 30-second windows | Even if code is guessed, it expires quickly | | Increasing delays (exponential backoff) | Slows down progressive guessing | | Monitor and block IPs making many attempts | Disables distributed brute-force | 6 digit otp wordlist
A 6-digit OTP wordlist is a simple but powerful tool that highlights the low entropy of numeric MFA codes. Its existence is not inherently malicious, but it becomes dangerous when systems lack proper rate limiting, lockout policies, or short expiration windows. For developers and security professionals, understanding OTP wordlists reinforces the need for robust secondary controls. For users, it explains why SMS OTPs alone are increasingly considered insecure for high-value accounts. a wordlist of 6-digit one-time passwords (OTPs) for