Final answer:
A passphrase is a more secure alternative to traditional passwords that can be used to protect sensitive information. It is recommended to periodically update passphrases for better security and remain vigilant against social engineering. Additional security measures like anti-virus software should be used to protect against all types of threats.
Step-by-step explanation:
A passphrase is a memorable sequence of words or characters used as a password to protect sensitive information. It is a more secure alternative to traditional passwords because it is longer and more complex. For example, instead of using a short and simple password like '123456', a passphrase could be 'Ilove2PartyOnSaturdays!' which is harder to guess or crack.
Unlike passwords, passphrases do not necessarily need to be changed weekly. However, it is still recommended to periodically update them for better security. Passphrases are not immune to social engineering, which is a technique used by attackers to manipulate individuals into revealing confidential information. Therefore, it is important to remain vigilant and not disclose your passphrase to anyone or fall for social engineering tactics.
While passphrases can provide protection against keystroke loggers, which are malicious software that record the keystrokes on a computer, it is still a good practice to use additional security measures such as anti-virus software to protect your computer from all types of threats.