What method does Out-of-Band Authentication use for sending verification credentials?

Out-of-Band Authentication enhances security by using a method that sends verification credentials through an alternative communication channel. This approach helps mitigate the risk of interception by an attacker who may be monitoring the primary communication channel. For instance, while a user attempts to log in through a web application, a one-time code could be sent to their mobile phone via SMS or a phone call. This means that even if an attacker compromises the primary method of authentication, they would still need access to the secondary channel to complete the authentication process successfully.

This dual-channel approach adds a significant layer of security, making it more difficult for unauthorized users to gain access to sensitive information or systems. Utilizing a different communication method for the verification credentials is what distinguishes out-of-band authentication from standard authentication methods that may use the same channel for both communication and credential transmission.