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Single Answer
0What challenge drives the need for key exchange mechanisms?
Answer Options
A
The number of keys required for symmetric encryption
B
The need to determine if a key is public
C
The need to exchange keys in a way that prevents others from obtaining a copy
D
The need to securely return keys to their owner after they are traded
Correct Answer: C
Explanation
Key exchange algorithms focus on how to securely exchange keys so that others cannot obtain a copy of the key. Asymmetric encryption is used instead of symmetric encryption to resolve the issue of large numbers of symmetric keys; keys are either public or private in asymmetric systems and determining if they are public is not considered a problem; and keys are not returned to their owner, as only public keys should be exchanged.