Encrypted First-Message WiFi Access for Zero-Power IoT
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Solution Overview
Problem
Zero-power devices, particularly those with low complexity and low power consumption, face challenges in completing traditional access processes in WiFi systems due to excessive delays and energy constraints, which are problematic for IoT applications with stringent delay requirements.
Innovation Solution
A wireless communication method where a first device sends a message encrypted with a first key to a second device during the access process, simplifying the access and key exchange process, thereby reducing delay and energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional access process (scanning, authentication, association, 4-way handshake) is used, then security and authentication are ensured, but access delay and energy consumption increase excessively
Solution Approach 1:
The patent extracts the essential authentication function from the traditional multi-step access process. Instead of requiring complete scanning, authentication, association, and 4-way handshake procedures, the invention directly implements authentication through encrypted information exchange in the first message, removing unnecessary steps while preserving security.
Solution Approach 2:
The patent applies preliminary action by pre-configuring encryption keys in zero-power devices before deployment. This allows the devices to perform authentication without requiring complex real-time key exchange procedures, thereby reducing access delay while maintaining security through pre-established cryptographic credentials.
2Reliability
If traditional access process is used, then authentication is completed, but energy consumption increases beyond what zero-power devices can sustain
Solution Approach 1:
The patent removes energy-intensive operations from the access process. By extracting only the essential authentication function and implementing it through a simplified encrypted message exchange, the invention dramatically reduces the computational and transmission energy required compared to traditional scanning, authentication, association, and key exchange procedures.
Solution Approach 2:
The patent enables zero-power devices to authenticate themselves using pre-configured keys without requiring energy-intensive interaction with the access point for key exchange. The device performs self-authentication by incorporating encrypted information in its first message, eliminating the need for the access point to expend energy verifying complex authentication protocols.
3Productivity
If zero-power devices are deployed for large-scale IoT applications, then device density and cost are improved, but access delay becomes unacceptable for delay-sensitive applications
Solution Approach 1:
The patent extracts the core authentication functionality from the traditional access protocol suite, creating a streamlined process that maintains security while dramatically reducing the number of message exchanges required. This enables zero-power devices to access the network quickly, making large-scale deployment viable for delay-sensitive IoT applications.
Data Source
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AI summary
The embodiment of the present application provides a wireless communication method, a first device, and a second device. The method comprises: when accessing a second device, a first device sends a first message to the second device; wherein the first message comprises target information encrypted via a first key. Compared with a solution involving the first device performing scanning, authentication, and association so as to complete the access process, and using four handshakes to exchange the key and then report the target information, in the present embodiment, the first device directly carries target information in a first message during the access process, thereby simplifying access and key exchange when the first device reports target information, and reducing first device access delay and energy consumed; moreover, using the key to encrypt the target information not only allows the second device to authenticate whether the first device has access qualifications, but also ensures the security of the target information.