Public key cryptography is a method of encrypting or signing data with two different keys and making one of the keys, the public key, available for anyone to use. The other key is known as the private key. Data encrypted with the public key can only be decrypted with the private key.

The answer is correct

The correct answer is B. The key used to encrypt the data is kept private, but the key used to decrypt the data is made public. Public key encryption, also known as asymmetric encryption, involves the use of two different but mathematically related keys: a public key and a private key. In this encryption scheme, the public key is used to encrypt the data, while the private key is used to decrypt the data. The purpose of making the public key widely available is to allow anyone to encrypt data that can only be decrypted by the owner of the corresponding private key. By keeping the private key secret, the owner maintains exclusive access to the decrypted information.