Key pair
1. A public key and its corresponding private key.
2. Two mathematically related keys having the property that one key can be used to encrypt a message that can only be decrypted using the other key.
Source: Explore Terms: A Glossary of Common Cybersecurity Terminology, National Initiative for Cybersecurity Careers and Studies (NICCS), https://niccs.us-cert.gov/about-niccs/glossary