WLAN Device Secure Network Access via Encrypted Key Generation
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Solution Overview
Problem
Existing smart home solutions face significant security issues due to intelligent appliances being able to sniff and acquire network SSID and login passwords, leading to unauthorized access and privacy leakage.
Innovation Solution
A method where a WLAN-enabled device uses a preset key material to encrypt and decrypt access information, ensuring secure network access by generating a key using unique identification information and a preset key material, preventing unauthorized access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If intelligent appliances sniff and acquire SSID and login password openly, then network access is easy to implement, but security is compromised
Solution Approach 1:
The patent applies preliminary action by pre-configuring unique device identification information and key materials in intelligent appliances before they are deployed. The access information is encrypted using keys generated from these pre-configured elements, so that when the appliance needs to access the network, the encryption/decryption process has already been prepared in advance, enabling secure automatic authentication without manual intervention
Solution Approach 2:
The patent introduces an intermediary mechanism by using encrypted access information as a mediator between the intelligent appliance and the network. Instead of directly transmitting plain SSID and password, the system uses encryption keys derived from unique device identifiers to protect the access information, creating a secure intermediary layer that prevents unauthorized sniffing while maintaining automatic access
2Reliability
If encryption and decryption processes are added to secure network access, then security is improved, but device complexity increases
Solution Approach 1:
The patent applies self-service by enabling intelligent appliances to automatically generate their own encryption keys using their unique device identification information and pre-configured key materials. Each device independently performs encryption and decryption operations without requiring external key management infrastructure, reducing system complexity while maintaining security
Solution Approach 2:
The patent uses parameter changes by transforming the unique device identification information (a static parameter) into dynamic encryption keys through cryptographic functions. This allows the system to derive secure, variable encryption parameters from fixed device identifiers, enabling security without requiring additional complex key management mechanisms
Data Source
AI summary
A method for a WLAN-enabled device to access to a network is provided, including the following steps. An intelligent terminal device acquires a key KEY1, encrypts, by using the KEY 1, access information of a wireless access device that is known by the intelligent terminal device, and then transmits the access information as well as the unique identification information. WLAN-enabled device sniffs and acquires the unique identification information and the encrypted access information, generates the KEY1 based on the unique identification information and a preset key material, and decrypts the encrypted access information by using the KEY1 to obtain the access information. The present invention further relates to a WLAN-enabled device for implementing the method and an intelligent terminal device.