Traditionally, people gain access to secure places using something they know, such as passwords, or something they possess, such as security cards or bank automated teller machine (ATM) cards.

• 传统上，人们利用他们知道的东西，如口令，或者他们具有的东西，如安全卡或银行的自动提款机卡，来获得对保密地方的访问。