Which of the following is NOT a responsibility of a Certificate Authority?

A Certificate Authority (CA) plays a crucial role in the public key infrastructure (PKI) by managing digital certificates. Among its primary responsibilities, the CA issues digital certificates, which verify the identity of entities and bind them to cryptographic key pairs. The CA is also responsible for revoking certificates when they're no longer valid or secure, ensuring that users can trust the integrity of the certificates they rely on.

Creating asymmetric keys typically falls to the user or the entity seeking a digital certificate, rather than the CA itself. While the CA may employ key generation processes when creating its own keys or during certificate issuance, it's not a fundamental responsibility like issuing or revoking certificates.

Storing user passwords is not a responsibility of a CA either; in fact, a CA's focus is more on public key management rather than private credential management. Since a CA does not handle user passwords, characterizing it in that way distinguishes the CA's function from other entities that manage user authentication. Thus, identifying activities such as storing user passwords as outside the scope of a Certificate Authority solidifies the understanding of its specific responsibilities within the broader framework of security practices.