Server Hello Message

D.

In HTTPS session establishment, the server hello message is the second message sent in the SSL/TLS handshake process. It is sent by the server to inform the client of the SSL/TLS version and the cryptographic parameters to be used for the session. The server hello message contains the following information:

B. Which versions of SSL/TLS the server will accept: The server hello message informs the client which SSL/TLS versions are supported by the server. The server may support multiple versions, and the client chooses the highest version that it also supports. This ensures that the communication between the client and server is performed using the most secure version of SSL/TLS available.

C. Which ciphersuites the client may choose from: The server hello message also informs the client of the ciphersuites that the server supports. A ciphersuite is a combination of encryption, authentication, and message authentication code (MAC) algorithms that are used to protect the data exchanged between the client and server. The client chooses the most secure ciphersuite that it also supports.

D. Which ciphersuite the server has chosen to use: Once the client selects a ciphersuite, the server hello message confirms the ciphersuite that will be used for the session. This ensures that the client and server agree on the same set of cryptographic parameters for the session.

E. The PreMaster secret to use in generating keys: The server hello message also includes a random value known as the "nonce." This value is used by the client to generate a PreMaster secret, which is then used to derive the session keys for the session. The session keys are used to encrypt and decrypt the data exchanged between the client and server.

A. That the server will accept only HTTPS traffic is not an accurate description of the information conveyed by the server hello message. The server hello message is used to negotiate the SSL/TLS parameters for the session, not to indicate that the server will accept only HTTPS traffic.