A set of three cryptographic algorithms (KeyGen, Encaps, and Decaps) that can be used by two parties to establish a shared secret key over a public channel.
Sources:
FIPS 203
under key-encapsulation mechanism
A set of three cryptographic algorithms: KeyGen (key generation), Encaps (encapsulation), and Decaps (decapsulation). These algorithms can be used by two parties to securely establish a shared secret key over a public channel.
Sources:
NIST SP 800-227
under key-encapsulation mechanism