•Public-key encryption (asymmetric encryption) uses two different
keys—a public key and a private or secret key.
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•The public key is known to everyone.
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•The private or secret key is known only to the person who owns both keys.
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•With public-key encryption, each person has a private key that is secret and a public key that is shared with other users.
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•Messages encrypted with a private key must be decrypted with the
public key, and vice versa.