Dynamic Access Control via Mobile QR Code Validation
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Solution Overview
Problem
Existing access control methods for buildings, areas, and elevators lack effective measures to prevent unauthorized access and misuse, as they rely on insecure identification methods that can be manipulated.
Innovation Solution
A method using a mobile phone to send an identification code to an access node, which generates and displays an access code; this code is then validated using a camera or scanner, ensuring only authorized individuals gain access, with features like limited-time and single-use codes to reduce misuse.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional identification methods are used for access control, then the system is simple to operate, but the security against unauthorized access and manipulation is insufficient
Solution Approach 1:
The access control system transitions from static identification methods to dynamic codes that change over time. The access codes are generated with time validity periods and can only be used once, making the system adaptive and resistant to unauthorized access attempts.
Solution Approach 2:
The system uses optical copies (2D codes) of access information that can be displayed on mobile devices. These visual codes serve as secure carriers of access authorization, replacing traditional physical keys or cards while maintaining ease of use.
2Reliability
If static access codes are used, then the system is easy to implement, but the risk of misuse and unauthorized access increases
Solution Approach 1:
Access codes are generated with periodic validity - they expire after a certain time period or after a single use. This temporal dimension to code validity ensures that even if codes are compromised, the window for misuse is limited, enhancing security without significantly complicating user interaction.
3Reliability
If optical codes with limited validity are implemented, then the protection against misuse is improved, but the system complexity and implementation cost increase
Solution Approach 1:
The system replaces mechanical or manual access control mechanisms with electronic and optical systems. Mobile devices generate and display 2D codes, while optical reading devices automatically scan and validate them, eliminating the need for physical key exchange or manual verification processes.
Data Source
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AI summary
The method for access control comprises the following steps. An identification code (ID) is sent to an access node (2) using a mobile telephone (1). If the identification code (ID) is recognized as valid, an access code (6; 7) is sent from the access node (2) to the mobile telephone (1) and presented on the display (1.1) of the mobile telephone (1). The access code (6; 7) is detected using a camera (5), and if the access code (6; 7) is recognized as valid, the access is granted.