Yasmine is responsible for secure communications with her company's e-commerce server. All communications with the server using TLS. Which of the following is the most secure option for Yasmine to store the private key on the e-commerce server?

A hardware security module (HSM) is the most secure way to store private keys for the e-commerce server. An HSM is a physical device that safeguards and manages digital keys. Full-disk encryption (FDE) will protect the data on the e-commerce server, but it won’t help store the key. It is also difficult to fully encrypt the e-commerce server drive since the drive will need to be in use for the e-commerce to function. A self-encrypting drive (SED) is merely automatic full-disk encryption. Software-defined networking (SDN) won’t address the issues in this scenario, since it configures networks via software and does not provide secure key storage.