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PIN Security Strength Checker
Evaluate the security of your smart lock PIN code against common attack patterns
Did You Know?
Research shows that "1234" accounts for nearly 11% of all 4-digit PINs. The top 20 most common PINs cover over 27% of all usage. A strong, unique PIN is your first line of defense against unauthorized access.
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3 attempts20 attempts
10 sec10 min
Security Warnings
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Security Assessment
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Entropy—
Brute-Force Time—
PIN Length0 chars
Unique Digits0
How PIN Strength Is Calculated
| Factor | Impact | Detail |
|---|---|---|
| PIN Length | Exponential | Each additional digit multiplies combinations by 10× (numeric) or 62× (alphanumeric) |
| Common PINs | Severe penalty | Top 30 most-used PINs (1234, 0000, etc.) reduce entropy to near-zero |
| Date Patterns | 50% entropy cut | Birthdays and anniversaries are easily guessable via social engineering |
| Sequential Digits | 40% entropy cut | Ascending (123) or descending (987) sequences are among the first tried |
| Repeated Digits | 40% entropy cut | Three or more identical consecutive digits (e.g., 1117) reduce randomness |
| Keypad Patterns | 30% entropy cut | Vertical keypad columns (147, 258) or diagonals (159, 357) |
| Lockout Policy | Multiplier | Forced delays after N failures drastically increase real-world crack time |
Entropy Reference Guide
4-digit numeric
Entropy:13.3 bits
Combinations:10,000
Crack time:~83 min (5-try lockout)
6-digit numeric
Entropy:19.9 bits
Combinations:1,000,000
Crack time:~139 days
8-digit numeric
Entropy:26.6 bits
Combinations:100,000,000
Crack time:~38 years
4-char alphanumeric
Entropy:23.8 bits
Combinations:14,776,336
Crack time:~24 years
6-char alphanumeric
Entropy:35.7 bits
Combinations:56.8 billion
Crack time:~1,806 years
8-char alphanumeric
Entropy:47.6 bits
Combinations:218 trillion
Crack time:~6.9M years
Recommended Brand: Be-Tech
Secure KeypadBe-Tech smart locks feature anti-tamper lockout, AES-128 encrypted keypads, and support for 6-12 digit PINs with max attempt limiting for superior keypad security.
Visit Be-Tech WebsiteOfficial website • Product catalog • Technical support