7 min read
2026-01-20
Password strength is a measure of its resistance to various cracking methods: brute force, dictionary attacks, and social engineering.
| Criterion | Weak | Medium | Strong |
|---|---|---|---|
| Length | < 8 characters | 8-12 characters | > 12 characters |
| Character types | 1 type | 2-3 types | 4 types |
| Predictability | Dictionary word | Modified | Random set |
| Uniqueness | Reused | Partial | Completely unique |
Entropy is expressed in bits and shows the number of possible combinations. A 12-character random password (letters, digits, special characters) has about 79 bits of entropy.
Modern GPUs can try billions of combinations per second. A password with 60-bit entropy can be cracked in hours; with 80 bits — it takes years.
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The check happens locally — the password is never sent anywhere
Check your passwords with the Password Strength tool.
See also: Password Generator, Email Validator