What is the difference between public key and private key encryption?

Public key cryptography, in the context of SSL/TLS, is used for the actual communication portion of the connection. Each party derives the key during the handshake and then uses it to both encrypt and decrypt all data that’s transmitted between them. Private key encryption, or symmetric encryption, uses smaller keys that are easier to compute with.

Can a public key be used to encrypt ciphertext?

Both the sender and the recipient use the same key. Asymmetric or public key encryption requires a pair of keys, one public key and one private key, to encrypt and decrypt data. The public key can be openly distributed, allowing anyone to use the public key for encryption. However, the public key cannot be used to decrypt the ciphertext.

How does a private key work?

The receiver with the private key can only decode the message, which is encrypted by the public key. The key is available via the public accessible directory. The private key is a secret key that is used to decrypt the message and the party knows it that exchange message.

What security services are provided when using a private key?

The security service provided when using a private key is simply confidentiality. Asymmetric encryption involves a public key and a private key. The public key is used to encrypt data. The private key is used to decrypt data.