Key Management Infrastructure (KMI) definition in Computer Security terms:
Definition(s): The framework and services that provide for the generation, production, distribution, control, accounting, and destruction of all cryptographic material, including symmetric keys, as well as public keys and public key certificates. It includes all elements (hardware, software, other equipment, and documentation); facilities; personnel; procedures; standards; and information products that form the system that distributes, manages, and supports the delivery of cryptographic products and services to end users.
Source(s): NIST SP 800-57 Part 2
The framework and services that provide the generation, production, storage, protection, distribution, control, tracking, and destruction for all cryptographic keying material, symmetric keys as well as public keys and public key certificates.
Source(s): CNSSI 4009-2015 (CNSSI 4005)
reference: CSRC Glossary