Question: Public key cryptography uses: a. One key for encryption and decryption b. Four keys, one for each direction of communication c. Two keys, one for

Public key cryptography uses:

a. One key for encryption and decryption

b. Four keys, one for each direction of communication

c. Two keys, one for encryption and one for decryption

d. Three keys, one for encryption, one for decryption, and one for authentication

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