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To protect recipient confidentiality, messages in PKI are encrypted using what?
sender's private key
recipient's public key
recipient's private key
sender's public key
The role of the public key in asymmetric cryptography is to encrypt messages which its own mathematically-related private key then decrypts, thus assuring that the intended recipient is the only one who can view the message. The signing of a digital signature is the only time a public key is used to create a cryptographic file of any kind. Ambiguous.
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