Your company, SecureTech Inc., is planning to transmit some sensitive data over an unsecured communication channel. As a cyber security expert, you decide to use symmetric key encryption to protect th

Switching all data transmission to the HTTPS protocol is a higher-level solution that uses TLS/SSL to secure communication, but it is not the specific protocol for exchanging the symmetric key itself, rather HTTPS leverages such protocols.

Implementing SSL certificates primarily provides server authentication and enables TLS encryption, but the certificates themselves are not the protocol for the secure exchange of the symmetric key.

Utilizing SSH is for secure remote shell access and file transfer, and while it uses strong encryption and key exchange mechanisms, it is an application protocol, not the underlying protocol for securely exchanging a symmetric key for general data transmission.

The Diffie-Hellman protocol is a cryptographic protocol that allows two parties to establish a shared secret key over an insecure communication channel without any prior shared secret. This shared secret can then be used as the symmetric key for encrypting and decrypting the sensitive data, fulfilling the requirement for secure key exchange.