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cisco exam dump.Upon receiving the digitally signed packet, Robin will first decrypt (or decode) the encrypted hash with Batman's public key, then set the decrypted hash aside and perform the same hash operation on the packet as Batman did. If the hash calculated by Robin matches the hash just decrypted (the hash Batman attached to the packet and issued as a digital signature), Batman's identity successfully passes the authentication just performed by Robin - because Batman's digital signature can only be created with his own private key, which is unique to Batman.6.3.3 Certificate Authority A certificate authority (certificateauthority) is a computer or entity that creates and issues digital certificates.O The internals of a digital certificate contain information related to the identity of the device, for example, the IP address of the device, the fully strict domain name builder (FQDN), and thepublic key. The CA accepts the request from the device (whereby the device provides all of the above information plus a self-generated public key) and generates a digital certificate. The CA also assigns a serial number to this certificate. The CA then signs the certificate with its own digital signature. Ultimately, the certificate is embedded in a URL for other devices to check whether the certificate has been revoked and the validity date of the certificate (an unexpired certificate is considered valid). In addition, the certificate contains information about certain other parameters used by the CA and PKI that issued the certificate. Figure 6-7 shows the digital certificate for the website example.org, which contains the information previously mentioned.Lj DIgiCeH High Assurance EV Root CA6.3 PKI Basics 307J SHA2 High Assurance Server CALJ www.exampte.orgDigiul Signature, Key EnciphermentBasic Constraints ( 2.6.29.19 ) Critical YES Cortmoato Authority NO