Bluetooth LE Device Authentication via Public Key Exchange
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Solution Overview
Problem
Existing Bluetooth technologies face challenges in authenticating devices efficiently, particularly for devices without user interfaces, and require complex methods for connection management, which can be inconvenient for users.
Innovation Solution
A method using Bluetooth Low Energy (LE) technology for device authentication, involving user identification, public key exchange, and specific authentication methods based on the input/output capabilities of devices, including PIN, password, pattern, vibration, and LED, to simplify the authentication process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional Bluetooth authentication methods are used, then device connection can be established, but the authentication process becomes complex and inconvenient for users
Solution Approach 1:
The system enables devices to perform self-authentication using pre-stored public keys and device identifiers. The authentication process automatically compares device IDs and verifies public keys without requiring manual user intervention, allowing the device to authenticate itself autonomously
Solution Approach 2:
Public keys and device identifiers are pre-configured and stored in both devices before connection. This preliminary setup eliminates the need for complex real-time authentication protocols, as the verification data is already in place and ready for automatic comparison when connection is established
2Adaptability or versatility
If authentication methods are standardized for all devices, then the protocol is simple, but devices without user interfaces cannot perform authentication
Solution Approach 1:
The authentication method is adapted according to the specific capabilities of each device. Devices with user interfaces can use traditional methods, while devices without interfaces automatically use the alternative method based on pre-stored public keys and device ID comparison, allowing each device to use the authentication approach best suited to its local characteristics
Solution Approach 2:
The system dynamically selects the authentication method based on device capabilities. The protocol can switch between different authentication approaches depending on whether the device has a user interface, making the system flexible and adaptable to various device types rather than being rigidly standardized
3Reliability
If manual authentication procedures are used, then security can be verified, but the connection establishment time increases
Solution Approach 1:
The system skips the time-consuming manual authentication steps by directly comparing pre-stored device identifiers and public keys. This allows the authentication security check to be performed rapidly through automated data comparison rather than through lengthy manual verification procedures
Data Source
AI summary
Disclosed is an authentication method and system for a device using a Bluetooth technology. A method for performing authentication by a first device, using Bluetooth low energy (LE), according to an embodiment of the present invention comprises: authenticating a user on the basis of ID information of the user; and authenticating a device by comparing information acquired from a user input with information acquired using an exchanged public key. The authentication scheme for a device is determined according to the input/output capability of the device.