Passphrase

A passphrase is a multi-word secret like `correct horse battery staple`, used in place of a short complex password. The security comes from length and unpredictability of word choice, not character mixing: a six-word Diceware passphrase has roughly 77 bits of entropy, far stronger than a typical 10-character password with symbols. Passphrases are easier to type and remember, work well for full-disk encryption and KeePass master passwords, and resist shoulder surfing better than character-soup passwords. They still need to be unique per service and stored in a password manager.