Key Unit Time Validation for Reservation-Based Access Control
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Solution Overview
Problem
Existing key management systems that allow mobile terminals to unlock vehicles or facilities without real-time network access cannot confirm if the current time is within the reservation period, leading to potential improper use before or after the reservation time, as authentication information can be acquired in advance without verifying the current time.
Innovation Solution
A locking and unlocking system that includes a mobile terminal and a key unit, where the mobile terminal transmits authentication information with start and end times to the key unit, which determines if the current time is within the reservation period, and only allows unlocking if the time is valid, using a key-unit timer synchronized with a server timer for accurate time determination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If authentication information is acquired in advance without real-time network access, then convenience for users is improved, but security against improper use outside reservation time deteriorates
Solution Approach 1:
The system performs preliminary authentication and issues authentication information before the reservation period starts. The mobile terminal receives authentication information in advance from the server, allowing users to have the key ready before arrival. However, the actual unlocking is controlled by the key unit which verifies the current time against the reservation period, preventing premature use while maintaining user convenience.
Solution Approach 2:
The key unit continuously monitors the current time and compares it with the reservation period (start time and end time) embedded in the authentication information. This feedback mechanism ensures that even though authentication information is acquired in advance, the system can detect and prevent unlocking attempts outside the valid reservation period, thereby maintaining security.
2Speed
If authentication information is validated without time check, then unlocking speed is improved, but authorization control deteriorates
Solution Approach 1:
The authentication information including start time and end time of the reservation period is pre-loaded into the key unit along with the authentication credentials. This preliminary action allows the key unit to perform both authentication and time validation locally without real-time network access, maintaining fast unlocking speed while ensuring proper authorization control through the embedded time parameters.
Data Source
AI summary
A mobile terminal includes a transmission unit that transmits authentication information including a start time and an end time of a reservation and a request signal for requesting locking and unlocking of a door to the key unit. The key unit includes a reception unit that receives the authentication information and the request signal, an authentication unit that authenticates the mobile terminal when the authentication information is received, a determination unit that determines whether a current time is within a reservation time, and a locking and unlocking processing unit that prohibits unlocking of the door when it is determined that the current time is not within the reservation time on the premise that the door is unlocked/locked when the authentication succeeds and the request signal is received.