Answer:
Step-by-step explanation:
a. Asymmetric key encryption allows people to exchange secret messages without ever having met, by using different keys to encrypt and decrypt the messages. In this method, a pair of keys - a public key and a private key - are used to encrypt and decrypt the message. The public key is available to anyone who wants to send a message to the owner of the private key, while the private key is kept secret by the owner.
b. Symmetric key encryption, on the other hand, uses the same key for both encryption and decryption. This means that the sender and the receiver of the message need to have the same key in order to communicate securely. This method is not suitable for exchanging secret messages without prior communication or a secure way to exchange the key.
c. One-way encryption, also known as hash function, is a method of encrypting data that cannot be reversed. It is mainly used for verifying the integrity of the data or for storing passwords securely. It is not suitable for exchanging secret messages as the original message cannot be recovered from the hash value.