An organization currently writes backups to an EMC Data Domain system and then creates encrypted copies of their backups on tapes. These tapes are then shipped to a third-party offsite vault.
They are now planning to deploy a second Data Domain system to a secure data center at their corporate headquarters as a replication target to replace the use of the offsite tapes. The two sites are connected through the Internet.
Where should encryption be applied on the Data Domain systems to ensure a similar level of data security as achieved by their current process?

A.
Encrypt the replication context

B.
Encrypt the data at rest

C.
Encrypt the data at rest and the replication context

D.
Encryption is not required