You have subscribed to a cloud-based service to synchronize data between your mobile device and your PC. Before allowing the data to be synchronized, this service uses a process where the cloud service and the client on the mobile device verify each other's security certificates.?

Mutual Authentication.

Explanation:

Mutual Authentication also referred to as "two way authentication" is a process/technology by which two entities authenticates each other mutually in a link of communication. Here, server and client authentication are combined that is the client authenticates the server and the server authenticates the client. Client trusts the digital certificate of the server and in turn, server trusts the certificate of the client. Transport Layer Security (TLS) protocol is a means by which exchange of certificate is carried out. The certificate with the current timestamp is used to authenticate the client to the server if the client has more than one certificate.

   Mutual authentication

Explanation:  Also known as two-way authentication, it simply means that both parties identify with each other before any, even this action mentioned in the question. This is the default way to check the data and its authenticity in some protocols, while optional in some other protocols. Basically, mutual authentication is done from machine to machine where mutual users take care of whether or not the remote authentication is successful. Mutual authentication can be with a username and a password, or based on a certificate.

answer; i believe the correct answer is (8) eight.

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