None
A human entity that is responsible for managing a key for the non-human entity (e.g., device, application or process) that is authorized to use the key.
Source(s):
NIST SP 800-57 Part 2 Rev.1
A human entity that is responsible for managing a key for the non-human entity (e.g., organization, device, application or process) that is authorized to use the key.
Source(s):
NIST SP 800-57 Part 1 Rev. 5