Final answer:
The site security officer or designated security personnel is usually responsible for local/remote keys during site operations, ensuring proper handling and safeguarding according to security protocols.
Step-by-step explanation:
When conducting site operations, the individual who is responsible for the security and management of local/remote keys while on duty is typically the site security officer or designated personnel in charge of security protocols. This person ensures that the keys are properly handled, distributed, and safeguarded according to the site's security procedures. It is crucial that such responsibilities are clearly defined and communicated to maintain the integrity of physical and informational security at the site.