Out-of-Band Authentication — Out-of-band authentication uses a separate communication channel or device to support an authentication process. The separation adds protection against selected threats affecting the primary channel. Its strength depends on the secondary channel and the way attackers influence user approval. – Authentication

Added October 7, 2026

Out-of-Band Authentication — Out-of-band authentication uses a separate communication channel to support verification of a request or transaction. An example is approving a computer-based sign-in through a registered mobile application. Its strength depends on the independence and security of the channels and the user’s ability to recognize the genuine request.

Added November 6, 2026