What is the best description of the type of keys used in asymmetric encryption?

Asymmetric encryption is characterized by the use of a pair of keys: a public key and a private key. This method showcases how two different but mathematically related keys function together to secure communications and data. The public key is used for encryption, while the private key is utilized for decryption. What sets asymmetric keys apart is that the public key can be shared openly without compromising security, as the private key remains confidential and is only known to the owner.

The other choices do not accurately reflect the nature of asymmetric encryption. Symmetric keys refer to single keys used for both encryption and decryption, thereby not fitting the definition of asymmetric methods. Secret keys typically imply a single shared key, which again aligns with symmetric encryption. Lastly, while the term encryption keys could encompass both symmetric and asymmetric keys, it does not specifically denote the unique key pair involved in asymmetric encryption. Therefore, the best description aligning with the principles of asymmetric encryption is "asymmetric keys."