In asymmetric encryption, what type of key is typically used?

In asymmetric encryption, the method relies on a pair of keys: a public key and a private key. The public key is used to encrypt data, while the corresponding private key is used for decryption. This approach allows for secure communication, as the public key can be shared openly without compromising security. Only the holder of the private key can decrypt messages encrypted with their corresponding public key.

The use of a public key is vital because it enables functionalities such as secure data exchange and digital signatures. When someone wants to send a confidential message, they can encrypt the message using the recipient's public key. The recipient, who possesses the private key, can then decrypt the message. This two-key system is what differentiates asymmetric encryption from symmetric encryption, where a single secret key is used for both encryption and decryption.

Understanding the significance of the public key in asymmetric encryption is crucial, as it forms the foundation for many modern security protocols, including SSL/TLS for secure web communication.