(also Password entropy)
Guessing entropy definition
Guessing entropy measures the difficulty in correctly predicting a secret such as a password. It quantifies the variety of possible predictions an attacker might make and indicates security strength. A higher guessing entropy suggests stronger passwords and vice versa.
See also: Passphrase
Use cases of guessing entropy
- Password policies. Organizations set password complexity requirements based on guessing entropy. It assures that users create stronger security keys.
- Authentication systems. Guessing entropy helps design methods that resist brute-force attacks. It protects sensitive accounts and data.
- Encryption keys. Guessing entropy in robust encryption keys enhances the security of data transmissions and storage.
- Biometric security. Guessing entropy provides the uniqueness and unpredictability of biometric templates such as fingerprint or face recognition.
- Token generation. When generating tokens for two-factor authentication, guessing entropy ensures that they are sufficiently random and difficult to predict.