A passphrase is a sequence of words or a sentence used to secure access to information or systems. Unlike traditional passwords, which are often short and complex, passphrases are typically longer and easier to remember. They can include spaces and punctuation, making them more secure against unauthorized access. Using a passphrase enhances security because it increases the number of possible combinations, making it harder for attackers to guess. Many experts recommend using a passphrase that is unique and personal, incorporating elements like favorite quotes, song lyrics, or memorable events to create a strong yet memorable security measure.