A passphrase is a password that is longer and should be easier to remember for the creator, but harder for an attacker to guess. Essentially, a passphrase is a password made up of a collection of unrelated words. It may contain words from a movie, a lyric from a song, or just be a completely random combination of words. The key to a strong passphrase is that the passphrase chose not to be made from a quote, a commonly used phrase, or a group of related words.
One example of a passphrase would be PurpleTurtleLamp. This passphrase is 16 characters in length, easy to remember, and quick to type in. Length is king when it comes to creating brute force resistant passwords. The example passphrase, PurpleTurtleLamp, lacks complexity using just upper- and lower-case letters. While having symbols and numbers does increase the security of a password, the length of the passphrase makes the password significantly stronger than a shorter and more complex password using numbers, and symbols as well. Also, because a passphrase is easier to remember due to low complexity, there’s less of a need to write it down.
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