Meaning of “callback security” in the English Dictionary

business-english dictionary

"callback security" in Business English

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callback securitynoun [ U ]

uk us also dial-back security

IT a system used for protecting a computer network, in which a user calls into a computer, which checks the person's username and password, ends the call, and then calls back the number connected with that username and password

(Definition of “callback security” from the Cambridge Business English Dictionary © Cambridge University Press)