Authentication is a process to verify a person's identity for security purposes and authentication factor is the piece of information used to achieve it.

身份验证是出于安全目的检查人员身份的过程，而身份验证因素是用来实现身份验证的信息。

youdao

If businesses choose, they can opt for single-factor authentication, though two-factor security is also an option -- as unique as the veins in your palm are, it's still possible for the reader to register a false positive.

ENGADGET

To address these needs, this product includes a fingerprint reader and smart card reader for effective two-factor authentication.

ENGADGET: blogger-avatar

We all know by now that two-factor authentication drastically increases the security of an online account.

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