Point to remember for CISA Exam:(1)In any given scenario, certifying authority (CA) is solely responsible for issuance of digital certificate and managing the certificate throughout its life cycle.(2)In any given scenario, registration authority (RA) is responsible for identifying and authenticating subscribers, but does not sign or issue certificates.(3)In any given scenario, a digital certificate is composed of public key and information about the owner of public key.(4)In any given scenario, time gap between update of CRL (certificate revocation list) is critical and is also posses risk in certification verification.