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

Explanation:
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.