CompTIA Security+ Question G-28

Which of the following concepts is enforced by certifying that email communications have been sent by who the message says it has been sent by?

A. Key escrow
B. Non-repudiation
C. Multifactor authentication
D. Hashing

Answer: B

Regarding digital security, the cryptological meaning and application of non-repudiation shifts to mean: A service that provides proof of the integrity and origin of data. An authentication that can be asserted to be genuine with high assurance.