Lock Device Access Control via Inside Indicator
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Solution Overview
Problem
The risk of inadvertent unlocking of electronic lock devices due to incorrect determination of a mobile credential's location, leading to potential security breaches, especially when using wireless interfaces like Bluetooth Low Energy with a range that allows unintended access from inside the secured space.
Innovation Solution
Implementing an access management device that prevents communication between the lock device and mobile credential when the credential is inside the secured space by setting an 'inside indicator' that remains valid until explicitly cleared, either upon barrier opening or timer expiration, thereby avoiding erroneous location determinations and reducing the risk of unlocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If automatic access control is enabled for mobile credentials inside the barrier to allow contactless unlocking, then user convenience is improved, but the risk of inadvertent unlocking increases
Solution Approach 1:
The system performs preliminary location determination to detect whether the mobile credential is inside or outside the barrier before allowing access control operations. By proactively setting the inside indicator when the credential enters the barrier, the system prevents inadvertent unlocking attempts before they can occur, rather than reacting after an error happens.
Solution Approach 2:
The inside indicator acts as an intermediary mechanism that mediates between the mobile credential and the lock device. When the indicator is set, it blocks communication between the credential and lock, preventing unintended unlocking while still allowing the credential to function normally when outside the barrier.
2Reliability
If location determination is performed continuously to prevent inadvertent unlocking, then security is improved, but power consumption and system complexity increase
Solution Approach 1:
Instead of continuous monitoring, the system performs location determination periodically or event-driven. The inside indicator is set when the credential enters the barrier and cleared when it exits or after a timeout period, reducing the frequency of location checks while maintaining security.
Solution Approach 2:
The system extracts the critical security function (preventing inadvertent unlocking) from continuous monitoring by using the inside indicator mechanism. Once the indicator is set based on a location determination, the system maintains the security state without needing to continuously re-determine location, separating the detection function from the prevention function.
3Reliability
If the inside indicator remains set indefinitely to prevent security risks, then security is improved, but legitimate access from inside is blocked
Solution Approach 1:
The inside indicator is designed to be dynamic rather than static. It is automatically cleared when the barrier is opened or after a timeout period, allowing the system to adapt between security mode (when credential is inside) and access mode (when credential is outside or barrier is open), ensuring both security and legitimate functionality.
Data Source
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Figure 3A~4C
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AI summary
It is provided a method for managing access control to a physical space controlled by a first lock device. The method is performed by an access management device, and comprises the steps of: determining whether a mobile credential is located inside or outside a barrier secured by a lock device; storing an inside indicator in association with the mobile credential when it is located on the inside of the barrier, the inside indicator being valid until explicitly cleared; and preventing the mobile credential from establishing a communication channel with the first lock device when a valid inside indicator is stored for the mobile credential.