Which of the following is not a problem with secret-key cryptography?
a) It requires a large amount of processing time and complexity to implement.
b) Two parties must find a secure way to exchange the key.
c) A sender needs a different key for each receiver.
d) If the key is intercepted, a third party could pose as either host in the communication.
a) It requires a large amount of processing time and complexity to implement.
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