Security practitioners often use pre-compiled lists or generators for testing:
I can provide the specific code snippets required to securely implement rate-limiting and token verification.
: Numbers listed in order (e.g., 000000, 000001, 000002...). These are used for basic brute-force simulations.
They may contain hidden payloads, or worse, simply having them on your work machine could violate corporate security policies (as they are classified as "attack tools").
A complete wordlist containing every OTP from 000000 to 999999 occupies approximately as plain text (1 million lines × 6 digits + newline). This is trivial to store or transmit. 6 digit otp wordlist
Fixed-width numeric strings padded with leading zeros (e.g., 000001 , 048291 , 999999 ).
Most modern systems prevent "brute-forcing" (trying every code in a wordlist) by implementing rate limiting or account lockouts after 3–5 failed attempts.
Enterprise-grade application firewalls and authentication backends employ strict rate-limiting policies. Systems typically allow only
Since each digit in a 6-digit code can be any number from 0 to 9, the total number of unique combinations is calculated as 10610 to the sixth power They may contain hidden payloads, or worse, simply
There are several reasons why you might need a 6-digit OTP wordlist:
More advanced wordlists incorporate service-specific constraints – for instance, some banking apps reject codes with repeating digits or sequential patterns, so attackers adjust accordingly.
Six-digit One-Time Passwords (OTP) are the industry standard for Two-Factor Authentication (2FA) in banking, social media, and enterprise systems. While convenient, the limited keyspace of 6-digit numerical passwords presents a theoretical vulnerability to brute-force attacks. This paper explores the generation of "wordlists"—ordered lists of potential OTP values—analyzing the mathematical probability of successful prediction, the limitations of time-window constraints, and the efficacy of optimization strategies based on human password selection patterns.
Example safe Python snippet for generating only common patterns (not full list) for local testing: Fixed-width numeric strings padded with leading zeros (e
Ethical hackers and security engineers utilize 6-digit wordlists during authorized penetration tests to uncover flaws in authentication workflows. 1. Brute-Force Testing
Because the keyspace of a 6-digit code is relatively small, relying solely on the mathematical entropy of one million combinations is insufficient. Security architecture must enforce structural barriers around the validation endpoint. Account Lockouts and Throttling
Incident responders may compare logs of attempted logins against known wordlists to identify patterns of attack or credential stuffing.