Portable Device Access Control via Dynamic Verification Codes
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Solution Overview
Problem
Access control systems and elevator systems in commercial settings require users to present authentication methods, such as RFID cards or passwords, which can be cumbersome and do not fully leverage the potential of portable electronic devices for enhanced usability and security.
Innovation Solution
A system that provides access codes to portable electronic devices, allowing users to activate and verify access through SMS links, optical codes, or device identifiers, with additional security measures like device unlocking and limited validity times to prevent unauthorized forwarding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If access codes are provided to portable electronic devices via SMS links that can be forwarded, then user convenience is improved, but security is worsened due to potential unauthorized forwarding
Solution Approach 1:
The system performs preliminary verification by detecting whether the portable electronic device is unlocked before granting access. This preliminary action ensures that even if an access code is forwarded via SMS, it cannot be used unless the recipient can unlock their device, thereby maintaining security while preserving convenience
Solution Approach 2:
The system provides feedback about the device's locked/unlocked state to the access control system. This feedback mechanism allows the system to make informed access decisions based on the actual security state of the user's device, preventing unauthorized access while allowing legitimate access
2Reliability
If multiple authentication factors are required, then security is improved, but device complexity is worsened
Solution Approach 1:
The system merges multiple authentication factors (device ownership via SMS, device unlock state, and access code validation) into a unified authentication process. This consolidation provides robust security while presenting a simple user experience, as the user only needs to unlock their device and present it to the reader
3Reliability
If access codes are tied to specific devices, then security is improved, but adaptability is worsened
Solution Approach 1:
The system replaces traditional mechanical token-based access control with an optical code system displayed on portable electronic devices. This substitution allows access codes to be dynamically generated and displayed on any compatible device without being permanently tied to specific hardware, providing both security and flexibility
Data Source
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AI summary
To control access to a predetermined service or area, a system receives an activation signal indicative of a user's activation of an access code. As a result of receiving the activation signal, the system sends a verification code to a portable electronic device (170) of the user (150). An access terminal (180) receives the verification code. Access to the predetermined service or area is granted if the verification code is received at the access terminal (180) meeting one of several predetermined conditions. One condition requires that the verification code is provided to the access terminal (180) within a limited validity time.