Bluetooth Numeric Comparison Pairing via Coded LED Signals
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Solution Overview
Problem
Existing Bluetooth pairing methods for devices without displays or keyboards are insecure and costly, posing risks of man-in-the-middle attacks and complicating secure data exchange, particularly in contexts like handheld payment terminals.
Innovation Solution
A method using coded light sequences from LEDs to convey pairing codes, decoded by the handheld terminal, displayed for user confirmation, ensuring secure pairing without displays or keyboards.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional Bluetooth pairing methods are used for devices without displays or keyboards, then pairing can be completed, but security is compromised and vulnerability to man-in-the-middle attacks increases
Solution Approach 1:
The patent introduces an intermediary device (such as a smartphone or computing device) that mediates the pairing process between two Bluetooth devices. This intermediary displays the Bluetooth address and pairing code, allowing secure verification without requiring the Bluetooth devices themselves to have displays or keyboards. The intermediary acts as a trusted third party that enables secure pairing for devices lacking these input/output capabilities.
2Ease of operation
If devices without displays or keyboards use traditional pairing methods, then pairing is possible, but device complexity and cost increase due to additional requirements
Solution Approach 1:
The patent enables Bluetooth devices to perform pairing verification themselves by displaying their own Bluetooth address and pairing code on their respective displays, without requiring external assistance. The devices autonomously present their identification information and allow the user to verify the match, eliminating the need for an intermediary device while maintaining security for devices that have display capabilities.
Solution Approach 2:
The patent creates a universal pairing solution that works across different device types. Devices with displays use self-service verification, devices without displays use intermediary-mediated verification, and the system accommodates various Bluetooth device configurations (with or without keyboards, with or without displays) through a single standardized protocol, reducing the need for specialized hardware.
3Reliability
If numeric comparison pairing is implemented for all devices, then security is improved, but ease of operation deteriorates for devices without displays or keyboards
Solution Approach 1:
The patent uses an intermediary device to perform the numeric comparison verification on behalf of Bluetooth devices that lack displays or keyboards. The intermediary displays the Bluetooth address and pairing code, allows the user to verify the match, and confirms the pairing, thereby enabling secure numeric comparison pairing for devices that cannot independently perform this function.
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
Enables secure and cost-effective pairing of devices like handheld payment terminals with base stations, protecting against attacks and facilitating sensitive data exchange.
Implementation Method 1
capturing, by an image capture device on the handheld payment terminal, a coded light sequence emitted by one or more light emitting diodes (LEDs) on the base station
Implementation Method 2
capturing, by an image capture device on the handheld payment terminal, a coded light sequence emitted by one or more light emitting diodes (LEDs) on the base station
Data Source
AI summary
Systems, methods, and devices for Bluetooth numeric comparison pairing between a handheld payment terminal and a base station that is incapable of displaying digits of a base station Bluetooth pairing code are disclosed. A handheld payment terminal computer program may initiate Bluetooth numeric pairing with a base station; generate a handheld payment terminal Bluetooth pairing code; capture a coded light sequence emitted by LEDs on the base station; decode the coded light sequence to determine the base station Bluetooth pairing code; cause the base station Bluetooth pairing code and the handheld payment terminal Bluetooth pairing code to be displayed on a display; and in response to Bluetooth pairing code match, pairing the handheld payment terminal with the base station. The base station provides access to one or more networks and/or data communication to the handheld payment terminal when paired.