CompTIA Security+ Question A-78

A company would like to take electronic orders from a partner; however, they are concerned that a non-authorized person may send an order. The legal department asks if there is a solution that provides non-repudiation. Which of the following would meet the requirements of this scenario?

A. Encryption
B. Digital signatures
C. Steganography
D. Hashing
E. Perfect forward secrecy

Answer: B

A digital signature is an electronic mechanism to prove that a message was sent from a specific user (that is, it provides for non-repudiation) and that the message wasn’t changed while in transit (it also provides integrity). Thus digital signatures will meet the stated requirements.