A grand master key provides a high level of access within a master key system, granting access to multiple areas but not necessarily all. It sits between master keys and a great grand master key in terms of access hierarchy.
Here's a breakdown of how a grand master key works:
- Hierarchical Structure: Key systems are designed with a hierarchy. The grand master key (GMK) sits above standard master keys and below a great grand master key (if one exists). This means it can open all doors that the standard master keys can, but not necessarily every door in the entire system.
- Corporate Master Key: According to the reference, grand master keys are often used as a "corporate master key" for all multi-site locations' access. This implies that it is common in organizations with several locations that require tiered access control. (07-Jun-2023)
- Access Level: A grand master key is the next tier down of master level access. (07-Jun-2023) It has a higher level of access than master keys but cannot open all the doors a great grand master key can. (07-Jun-2023)
