Password Entropy

Definitions

1. A measure of how hard a password is to guess based on the unpredictability of the chosen secret and the attacker's likely search space. In practice, password entropy depends not just on length and character variety but on whether the password follows human patterns attackers already model well.

   In plain English: A measure of how hard a password is to guess.

   Example: "The passphrase had better password entropy than the short symbol-heavy password because it was longer and less guessable."

Related Terms

• Key Stretching
• PBKDF2
• Hash Cracking
• Password Aging
• Password Complexity
• Password Expiration
• Password Salt
• Password Strength