Mobile Device Ticket Validation Using Local Key and Device Properties
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Solution Overview
Problem
Current methods for checking the validity of electronic tickets, such as those used in public transport, are inefficient and insecure due to the need for two-factor authentication, which can lead to incomplete inspections due to time constraints.
Innovation Solution
A method where a mobile device receives information from a ticket inspector, processes it offline, and generates a unique code using a stored key and device-specific properties, allowing for secure and rapid validation of the ticket without requiring additional authentication factors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two-factor authentication is used for electronic ticket validation, then security is improved, but inspection time increases significantly
Solution Approach 1:
The patent applies preliminary action by pre-storing a unique key in the mobile device before the ticketing event. This key is used to generate a validation code locally during inspection, eliminating the need for real-time server communication and secondary authentication steps. The code is generated in advance based on the stored key and ticket information, enabling fast validation without compromising security.
Solution Approach 2:
The patent extracts the security verification function from the server-based two-factor authentication system and implements it locally in the mobile device. By generating the validation code locally using the stored key, the system removes the time-consuming server communication and secondary authentication factors, retaining only the essential security verification mechanism.
2Productivity
If visual inspection of QR codes is performed without machine verification, then inspection speed is improved, but detection accuracy deteriorates
Solution Approach 1:
The patent introduces an intermediary validation code that bridges the gap between visual inspection and machine verification. The code is displayed on the mobile device and can be quickly read by inspectors, serving as an intermediary element that enables both fast visual verification and accurate machine validation without requiring direct QR code scanning or complex authentication processes.
3Ease of operation
If electronic tickets are displayed on mobile device screens, then convenience is improved, but copyability increases making security harder to maintain
Solution Approach 1:
The patent applies local quality by binding the ticket validation capability to specific local properties of the mobile device, such as a uniquely stored key in secure memory. This ensures that while the ticket can be displayed conveniently on any mobile device screen, only the authorized device with the correct key can generate a valid validation code, preventing unauthorized copying and validation on different devices.
Data Source
AI summary
A method for checking the validity of a ticket involves transferring information from a control entity to a mobile device. A code is computed on the basis of this information, of a derived key and of a property individual for the mobile device, the code being subsequently checked by the control entity.