CompTIA Security+ SY0-701 Practice Question

The challenge in this scenario is maintaining the confidentiality of the encrypting key while allowing many users to securely access and use it. Symmetric encryption often struggles with the secure distribution of the key to a large number of users, as everyone must have access to the same key. Asymmetric encryption, on the other hand, relies on public and private keys and does not suit scenarios where one common key is shared for both encrypting and decrypting. A Key Agreement Protocol like Diffie-Hellman solves this problem by allowing two parties to securely create a shared secret key, which can then be used for encryption and decryption by all authorized parties without ever transmitting the key itself.