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What key(s) are used by the sender of an encrypted message in an asymmetric-key cipher?

What key(s) are used by the sender of an encrypted message in an asymmetric-key cipher? Correct Answer Public key of the receiver

The correct answer is option 2.

Concept:

The two keys are called the “public key” and the “private key” of the user. The sender uses a public key to encrypt the message. The recipient uses its private key to decrypt the message.

    Asymmetric encryption is also called public-key encryption, but it actually relies on a key pair. Two mathematically related keys, one called the public key and another called the private key, are generated to be used together. The private key is never shared; it is kept secret and is used only by its owner. The public key is made available to anyone who wants it. Because of the time and amount of computer processing power required, it is considered mathematically infeasible for anyone to be able to use the public key to re-create the private key, so this form of encryption is considered very secure.

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Hence the correct answer is the public key of the receiver.

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