Question: To send a signed message to a receiver when a public-key cryptosystem is used, the sender encrypts the message under the: a. Sender's private key

To send a signed message to a receiver when a public-key cryptosystem is used, the sender encrypts the message under the:

a. Sender's private key

b. Receiver's public key

c. Sender's public key

d. Receiver's private key

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