Use similar practices to generating a strong password when choosing a passphrase. The main difference between a password and a passphrase is that, in a passphrase, spaces are valid characters.
Pasaesaldia aukeratzeko, erabili pasahitz sendo bat aukeratzeko erabiliko zenukeen prozedura bera. Pasahitz baten eta pasaesaldi baten arteko ezberdintasun nagusia da pasaesaldian zuriuneak onartzen direla.