Question 1

What is a Diceware passphrase?

Accepted Answer

Diceware generates passphrases by picking random words from a standardized word list (typically ~7,776 words = 6^5, representing 5 dice rolls). Each word adds ~12.9 bits of entropy. A 6-word passphrase has ~77 bits of entropy — comparable to a strong random password but far more memorable.

Question 2

How secure is a passphrase compared to a password?

Accepted Answer

A 6-word Diceware passphrase has ~77 bits of entropy. A truly random 12-character password (all printable ASCII) has ~78 bits. They are approximately equivalent in strength. Passphrases have a memory advantage: 'correct-horse-battery-staple' is easier to remember than 'j4K!2mPx@9Lq'.

Question 3

How many words should a passphrase have?

Accepted Answer

5 words (~64 bits) is the minimum for most applications. 6 words (~77 bits) is recommended for general use. 7–8 words (~90–103 bits) for high-value accounts (email, banking, password manager master password). More words is always safer and only slightly harder to remember.

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