A.To decrease both capital and operating expenses associated with data storage
B.To decrease the threat of viruses and worm attacks against data storage devices
C.To meet changing business priorities，applications，and revenue growth
D.To increase the performance of long-distance replication，backup，and recovery

A.An entity responsible for registering the private key encryption used in a PKI
B.An agency responsible for granting and revoking public-private key pairs
C.A trusted third party responsible for signing the public keys of entities in a PKIbased system
D.A trusted third party responsible for signing the private keys of entities in a PKIbased system