The technology used for two-factor authentication (2FA) typically involves time-based one-time passwords (TOTP) or SMS-based codes. 2FA enhances security by requiring users to verify their identity through two distinct methods. The first factor is usually a password, while the second involves something the user possesses, like a smartphone app that generates a one-time code or a text message containing a verification code. This additional layer of security helps prevent unauthorized access and reduces the likelihood of account breaches, providing increased protection for sensitive information.