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

A.footprint analysis attack
B.privilege escalation attack
C.buffer Unicode attack
D.social engineering attack
E.front door attacks
F.Trojan horse attack