callback security Meaning in the Cambridge English Dictionary
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Meaning of “callback security” in the 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 ​computernetwork, in which a ​usercalls into a ​computer, which ​checks the person's username and password, ​ends the ​call, and then ​calls back the ​numberconnected with that ​username and ​password
(Definition of callback security from the Cambridge Business English Dictionary © Cambridge University Press)
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