Visible Light Communication for Secure Device Authentication
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing information processing systems using two-dimensional code images for user authentication are vulnerable to information snatching through secret photographing, necessitating a more secure communication method between devices.
Innovation Solution
An information processing system employing visible light communication, where an information processing device uses a light source to transmit identification information, and an information processing terminal captures and processes this information using an imaging unit, displaying an input screen and transmitting user inputs securely.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If two-dimensional code images are used for information transmission between information processing device and mobile communication terminal, then information can be transmitted, but the information can be snatched through secret photographing
Solution Approach 1:
The patent replaces the static visual two-dimensional code system with a dynamic visible light communication system. Instead of using fixed graphical codes that can be photographed, the system uses time-varying light emission states (intensity, wavelength, polarization) to encode and transmit information. This dynamic optical communication method makes it impossible to capture complete information through simple photographing, as the information changes over time and requires synchronized detection.
Solution Approach 2:
The patent changes the encoding parameters from static spatial patterns (two-dimensional code arrangements) to dynamic temporal and spectral parameters (light intensity variations, wavelength modulation, polarization state changes). By modulating the light source according to these varying parameters, the system transmits information in a form that cannot be captured by static imaging, thereby preventing information snatching while maintaining transmission capability.
2Loss of information
If visible light communication is used for information transmission, then information security is improved, but communication complexity increases
Solution Approach 1:
The patent makes the light source serve multiple functions: it acts as both the display element for user interface purposes and the communication transmitter for secure data transmission. The mobile terminal's imaging unit similarly serves dual purposes of capturing display information and receiving optical communication signals. This multi-functionality reduces the need for separate dedicated communication hardware, thereby limiting complexity increase despite the advanced communication method.
Solution Approach 2:
The patent introduces a visible light communication control unit as an intermediary that manages the complex modulation and demodulation processes. This control unit coordinates between the light source, the information processing device, and the mobile terminal, handling the sophisticated parameter modulations (intensity, wavelength, polarization) in a centralized manner. By centralizing the complex control logic in this intermediary component, the overall system complexity is managed more effectively than if distributed across all components.
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
Enhances security by making information transmission difficult to snatch through visible light communication, ensuring secure user authentication and operation between devices.
Implementation Method 1
a visible light communication control unit configured to control a light emission state of the light source on the basis of identification information of the information processing device and transmit the identification information
Implementation Method 2
an identification information acquiring unit configured to perform image processing on an image of the light source captured by the imaging unit and acquire the identification information of the information processing device
Data Source
AI summary
An information processing system including: an information processing device including a light source, and a visible light communication control unit configured to control a light emission state of the light source on the basis of identification information of the information processing device and transmit the identification information; and an information processing terminal including an imaging unit, an identification information acquiring unit configured to perform image processing on an image of the light source captured by the imaging unit and acquire the identification information of the information processing device, a display control unit configured to control display of an input screen for input of an operation to the information processing device on the basis of the identification information, and an input information transmitting unit configured to transmit input information input to the input screen to the information processing device.