Password vs Passphrase: Which Is Actually More Secure?

"Password" and "passphrase" get used interchangeably, but they're built differently — and each one is better suited to a different situation.

The difference

A password is a short, random string of characters — letters, numbers, symbols — like xK9$mQ2vL#pR. A passphrase is a sequence of random, unrelated words, like correct-horse-battery-staple. Both can be made highly secure; they just get there differently.

Why a passphrase can be easier to trust

Each additional random word adds a large jump in possible combinations, similar to adding several random characters. Because passphrases are built from real words, they're also much easier for a human to memorize and type accurately — which matters for the handful of passwords you actually need to remember, like your password manager's master password.

Why a random password still wins for most accounts

For accounts that a password manager fills in automatically, memorability doesn't matter — so a fully random, generated password packs more entropy per character than a passphrase does. There's no tradeoff to accept when you never have to type it yourself.

A practical split

• Use a passphrase for the few passwords you truly have to remember and type — most importantly, your password manager's master password.
• Use a generated random password — like the ones Keysmith creates — for every other account, and let a password manager store them.

That combination gives you something you can actually remember where it counts, and maximum strength everywhere else.