Password Entropy & Time-to-crack Estimator
What is Password Entropy?
What is Password Entropy?
Password entropy is a measurement of how unpredictable and random a password is. It's expressed in bits, where each additional bit doubles the number of possible combinations. Higher entropy means a password is more resistant to guessing and brute-force attacks.
- Measured in Bits: Each bit doubles possible combinations
- Randomness Factor: More random = higher entropy = stronger
- Attack Resistance: Predicts time needed to crack password
- Security Metric: Industry-standard password strength measurement
- Private: Passwords are analyzed locally and never uploaded
How to Use
- Enter or paste the password you want to analyze
- View real-time entropy calculation and strength rating
- Check estimated crack time under different attack scenarios
- Review suggestions for improving password security
- Verify the password meets your security requirements
Entropy & Security Glossary
- Entropy
- A measure of randomness or unpredictability in a password, expressed in bits.
- Bits of Entropy
- Each bit represents a doubling of password complexity. 80+ bits is considered strong.
- Brute Force
- Systematically trying all possible password combinations until finding the correct one.
- Attack Vector
- A method or pathway used by attackers to gain unauthorized access to a system.
- Character Space
- The total number of possible characters available for password creation.
- Guesses Per Second
- The rate at which an attacker can attempt password combinations.
- Common Password
- Frequently used passwords that appear in breach databases and are easily guessed.
- Password Policy
- Rules defining minimum requirements for acceptable passwords in a system.