Question

Assume that a user A wants to use the public-key certificate authority to distribute A's public key. How many times does user A need to contact the certificate authority to distribute A's public key to 50 other users? A. 100 B. 50 C. 1 D. 2500

Answer 1

User A needs to contact the certificate authority once to distribute A's public key to 50 other users using the public-key certificate authority.

Step-by-step explanation:

To distribute A's public key to 50 other users using the public-key certificate authority, user A needs to contact the certificate authority once.

The public-key certificate authority acts as a trusted third party that verifies and issues the public key certificates. When user A contacts the certificate authority, they will generate a certificate containing A's public key and digitally sign it.

User A can then distribute this certificate to the 50 other users, and they can use the certificate to verify A's public key and establish secure communication.