Description: The Negotiation Protocol is a fundamental mechanism in Public Key Infrastructure (PKI) that allows two parties to establish communication parameters before exchanging sensitive information. This protocol ensures that both parties agree on critical aspects such as the encryption algorithm, key length, and other necessary security parameters to ensure secure communication. Its importance lies in its ability to facilitate interoperability between different systems and technologies, allowing devices and applications from various manufacturers to communicate effectively and securely. Additionally, the Negotiation Protocol helps prevent man-in-the-middle attacks by establishing a clear framework for authentication and key exchange. In an environment where information security is paramount, this protocol becomes an essential component for protecting data in transit, ensuring that only authorized parties can access the exchanged information. In summary, the Negotiation Protocol is a key element in creating secure and reliable connections in the digital realm, ensuring that communications occur under agreed-upon and secure conditions.