Which of the following is the MOST significant key management problem due to the number of keys created?

While provisioning difficulty is a real concern, it is a consequence of the exponential key growth problem rather than the root cause or most significant issue itself.

Increased storage security requirements are a secondary operational concern that stems from having many keys, but it does not represent the foundational key management problem that symmetric encryption creates.

Asymmetric (public key) cryptography actually scales much more efficiently-each user only needs a key pair (public and private), so n users require only 2n keys, making exponential growth a characteristic of symmetric, not asymmetric, systems.

In symmetric key cryptography, every pair of communicating parties requires a separate shared secret key, resulting in n(n-1)/2 keys for n users. This quadratic/exponential growth-for example, 10 users need 45 keys, 100 users need 4,950 keys-is the most significant key management problem because provisioning, distributing, storing, and revoking this massive number of keys becomes operationally infeasible at scale.