Smartphone-Based Physical Access Control Using Geo-Location Estimates
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Solution Overview
Problem
Conventional access control systems rely on single or dual factors of authentication, are prone to loss or theft of key cards, and require costly hardware upgrades to utilize mobile devices for access, lacking flexibility, granularity, and security.
Innovation Solution
A system that uses a server connected to smartphones via a wireless network, leveraging geo-location estimates and dual secured communication paths to authenticate users and control access to physical portals without replacing legacy hardware, employing a smartphone app for secure access control using geo-location data and public/private key encryption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If key cards are used for access control, then authentication is simple, but the cards can be lost or stolen
Solution Approach 1:
The patent uses a virtual copy of the access control functionality embedded in a mobile device instead of a physical key card. The mobile device contains a copy of the access control app and cryptographic credentials that can be lost or stolen, but the system can respond by revoking access remotely, making the loss irreversible unlike physical cards that can be replaced.
Solution Approach 2:
The patent replaces the mechanical key card system with a wireless communication system using mobile devices. Instead of physical cards being read by magnetic stripe or RFID readers, the system uses wireless communication to transmit credentials and geo-location data, eliminating the need for physical card handling and enabling remote revocation of access.
2Adaptability or versatility
If mobile devices are used for access control, then flexibility and security are improved, but hardware upgrades are required at the door
Solution Approach 1:
The patent introduces a server as an intermediary between the mobile device and the access control system. The server receives geo-location data and authentication requests from mobile devices, processes them against stored credentials and geo-fence parameters, and controls the actuators remotely. This intermediary architecture allows legacy access control systems to support mobile devices without requiring modifications to the door hardware itself.
Solution Approach 2:
The patent adds a remote server dimension to the access control architecture, separating the decision-making logic from the physical access points. By moving authentication and geo-location processing to a remote server, the system enables mobile device access without modifying the door hardware, as the server communicates with existing readers or actuators through standard interfaces.
3Measurement precision
If geo-location based access control is implemented, then access precision is improved, but system complexity increases
Solution Approach 1:
The patent performs preliminary actions by pre-configuring geo-fence parameters, access time windows, and authentication credentials on the server before actual access events occur. The system stores pre-defined geographic boundaries and temporal restrictions, allowing rapid authentication decisions during actual access attempts without complex real-time calculations, thus reducing operational complexity while maintaining precision.
Data Source
AI summary
A method operates a server that is coupled to a network controlling door actuators at physical geo-locations. The server receives through a wireless communication network a request to enable physical access at a portal using a secure channel and a geo-location estimate from a mobile device. A circuit of the mobile device receives radio signal magnitude, phase, and power from at least one transmitter and authentication input from a user interface. Dual secured communications paths protect the server on its separately provisioned request channel and actuator command channel. Each legacy electronically controlled access portal is enabled to support smartphones without installing a replacement multi-band radio frequency reader at the geo-location.