Wireless Key Device Asynchronous Access Rights Update
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Solution Overview
Problem
Existing access control systems face challenges in efficiently updating access rights across lock devices, particularly when a key device is lost, due to the large and cumbersome nature of key update devices, leading to security compromises from delayed propagation of updates.
Innovation Solution
A key device equipped with a radio communication module, memory, and controller for asynchronous communication with access control devices, enabling efficient propagation of access rights and revocation lists, as well as validity time management, using a cellular network or short-range communication, and requiring user input for authentication when offline.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dedicated key update devices are used to update access rights, then updated access rights can be provided to key devices, but the key update devices are large and cumbersome, leading to infrequent updates and compromised security
Solution Approach 1:
The patent replaces the mechanical/dedicated update device system with a wireless communication system. The key device includes a radio communication module that enables wireless updates from the access control device, eliminating the need for physical key update devices and their associated mechanical interfaces. This substitution allows frequent, convenient updates while maintaining security through wireless protocol protection.
Solution Approach 2:
The patent introduces a wireless communication intermediary (radio communication module) between the access control device and key device. This intermediary enables the transfer of access rights and revocation lists without requiring physical contact or specialized update devices, making the update process both secure and convenient.
2Reliability
If a lost key device is barred from accessing lock devices, then security is maintained, but the update propagation time from operator to all lock devices is significant, compromising security
Solution Approach 1:
The patent implements preliminary action by enabling the access control device to proactively push revocation lists and updated access rights to key devices before any unauthorized access attempt occurs. The radio communication module receives updates asynchronously, ensuring that when a key device is lost, the revocation is already in effect or will be effectuated immediately upon the next communication cycle, eliminating propagation delays.
Solution Approach 2:
The patent ensures continuous update propagation through asynchronous communication channels. The key device maintains continuous or periodic communication with the access control device via radio, ensuring that revocation lists and access rights are continuously synchronized. This continuous action eliminates gaps where lost key devices could potentially access locked devices.
3Adaptability or versatility
If lock devices have no power supply, then they can be powered when a matching key device is inserted, but they have no other means of communicating than with a key device
Solution Approach 1:
The patent applies universality by making the key device multi-functional. The key device not only provides mechanical key functionality and electrical power to the lock device but also serves as a wireless communication relay. The radio communication module in the key device can communicate with the access control device, and this communication capability is leveraged to update the powerless lock device's access rights, combining multiple functions in a single device.
Solution Approach 2:
The patent uses the key device as an intermediary mediator between the access control device and the powerless lock device. Since the lock device has no power or communication means, the key device (which has both power and radio communication capability) acts as the intermediary carrier. The key device receives updated access rights and revocation lists from the access control device via radio, then mechanically transfers this information to the lock device through electrical connection during the key insertion process.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Facilitates timely and secure updating of access rights across lock devices, preventing unauthorized access by ensuring that lost or stolen key devices are barred efficiently, even without a direct power supply or communication means, thereby enhancing security and convenience.
Implementation Method 1
A key device (1) comprises: a blade (13) for mechanically manoeuvring a lock device (20)... a radio communication module (6); and a controller (2) arranged to, using the radio communication module (6) communicate with an access control device (30)
Data Source
Figure 1~2
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Figure 5
AI summary
It is presented a key device comprising: a blade for mechanically manoeuvring a lock device upon successful access control. The blade comprises a connector for powering the lock device and for communication with the lock device such that the lock device is able to perform electronic access control using the key device. The key device further comprises a clock; a memory; a radio communication module; and a controller arranged to, using the radio communication module communicate with an access control device and use the memory as temporary storage for asynchronous communication between the access control device and one or more lock devices. A corresponding method, computer program and computer program product are also presented.