NFC Security System Authentication via Proximity Credential Exchange
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Solution Overview
Problem
Current security systems face challenges with passcode management, including forgotten or lost codes, rushed entry leading to errors, and vulnerability to interception due to radio frequency signals being overheard by malicious entities.
Innovation Solution
Implementing a near field communication (NFC) system where a host object with an NFC device can change the status of a security system by being brought into close proximity with a target object, using bi-directional communication to authenticate and authorize the change, with features like time-based thresholds for access and expiring credentials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a passcode is used to control the security system, then the system can be securely accessed, but the user may forget or lose the passcode creating a security risk
Solution Approach 1:
The patent replaces the mechanical/passcode-based authentication system with a near field communication (NFC) system using electromagnetic fields. The host object contains an NFC device that communicates with the target object's NFC device, eliminating the need for users to memorize or physically handle passcodes while maintaining secure authentication through proximity-based credential verification
2Productivity
If a passcode is used to control the security system, then the system can be accessed, but the user is rushed when entering the passcode resulting in errors and false alarms
Solution Approach 1:
The patent substitutes the manual passcode entry process with automatic NFC authentication. When the host object is brought into proximity with the target object, the NFC devices automatically exchange authentication data and verify credentials, eliminating user input errors and significantly reducing access time without compromising security
Solution Approach 2:
The NFC authentication system performs self-service by automatically detecting the host object, retrieving stored credentials, verifying authorization, and executing the status change without requiring user intervention beyond bringing the device into proximity. This eliminates rushed manual entry and associated errors
3Ease of operation
If remote transmitters operate at VHF and UHF frequencies, then the user can control the system from a distance, but the transmitted information can be overheard by malicious eavesdroppers
Solution Approach 1:
The patent changes the operational parameters of the communication system by using NFC technology that operates at extremely close proximity (typically less than 10 cm), fundamentally altering the transmission characteristics from long-range radio frequency to short-range electromagnetic coupling. This proximity requirement physically prevents eavesdropping while maintaining remote control capability relative to the security system's location
Solution Approach 2:
The patent converts the potential harm of wireless transmission into a benefit by using the very electromagnetic field that could be intercepted as the authentication mechanism itself. The NFC system uses electromagnetic induction to establish a secure, proximity-based communication channel where the physical constraints of the field become the security feature, making eavesdropping impractical while enabling convenient remote operation
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method allows for quick and secure status changes of the security system, reducing errors and vulnerabilities by using proximity-based authentication and time-limited access credentials, enhancing user convenience and security.
Implementation Method 1
the near field communication device in the host object modulates a radio frequency field including identification information for the near field communication device and access credentials to the target object
Data Source
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AI summary
A security system control system using a host object with a near field communication device and a target object with a near field communication device. The target object broadcasts a carrier signal to the host object. Using the near field communication device, the host object modulated identification information on the carrier signal and broadcasts the modulated signal. The target object demodulates the signal to determine if a user associated with the identification information is authorized to perform the intended control function. The target object determines the intended control function based upon a detection criterion. The target object causes the intended control function to be performed if the associated user is authorised to control the intended control function such as to arm or disarm the security system. The identification information can expired after a predetermined period of time. The target object updates the identification information after expiration.