An automobile manufacturer publishes a Web service for use by their suppliers. The manufacturer has stringent security requirements that require suppliers to verify their identity. Data integrity and confidentiality must be maintained between the client and the server. Which two meet all of these requirements? (Choose two.)
A.
X.509 and XKMS
B.
XACML and XKMS
C.
SSL and mutual authentication
D.
XML Encryption and XML Digital Signature
E.
Private network and XML Signature
what’s mutual authentication? one type of digital signature?