Which of the following security services protects against repudiation?
DSSSB TGT - 2023,
Answer: A
Nonrepudiation is the security service that protects against repudiation, that is, against a sender or receiver later denying that they sent or received a message. Access control restricts who can use a resource, authentication verifies the identity of a user or system, and data integrity makes sure data has not been altered, so none of them is aimed at denial of an action. The other services protect different things: access control the use of resources, authentication identity and integrity the content of the data.
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