In The Key to Keys we review methodologies and protocols for issuing, tracking, retrieving and mitigating the loss of critical building/facility hard keys and access cards. All facilities employ personnel or contractors that are entrusted with accessing many, if not all, parts of the building i.e. janitors, security officers, engineers, leasing staff, property/facility managers, just to name a few. The process for accounting for keys is age old as is the risk of keys becoming lost or misplaced. Not too long ago the answer to lost keys was "cutting" new ones; today, most facility owners/managers move quickly to rekey, ensuring the safety and security of the property's employees, tenants and guests. We explore some of those processes and new technologies that keep our facilities more secure.