A bank has a fleet of aging payment terminals used by merchants for transactional processing.
The terminals currently support single DES but require an upgrade in order to be compliant with
security standards. Which of the following is likely to be the simplest upgrade to the aging
terminals which will improve in-transit protection of transactional data?

A.
AES

B.
3DES

C.
RC4

D.
WPA2

Explanation: