Wi-Fi Diagnostic Exchange Using Long-Term Keys Before Onboarding
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Solution Overview
Problem
The challenge of securely transmitting diagnostic data from a station (STA) to an access point (AP) during the onboarding process is exacerbated by the lack of a secure communication channel before keys are established, leading to difficulties in diagnosing and resolving connection failures, especially in IoT environments where network administrators lack access to client logs.
Innovation Solution
The use of a long-term key (LTK) to encrypt diagnostic data transmitted from the STA to the AP before successful onboarding, ensuring secure communication and protecting sensitive information, even when the STA has not yet associated with the AP.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If diagnostic data is transmitted in plaintext before key establishment, then transmission simplicity is improved, but data security deteriorates
Solution Approach 1:
The patent applies preliminary action by establishing a secure communication channel through key exchange (4-way handshake) before transmitting diagnostic data. The STA and AP perform authentication and key establishment in advance, then use the derived keys to encrypt diagnostic data transmission, ensuring security is in place before sensitive information is exchanged.
Solution Approach 2:
The patent uses encryption keys as an intermediary mechanism to protect diagnostic data transmission. The keys act as a mediator that transforms plaintext diagnostic data into encrypted form, allowing secure transmission over the wireless medium without exposing sensitive information to eavesdroppers.
2Difficulty of detecting and measuring
If STA logs are collected for diagnosis, then diagnostic capability is improved, but network administrator accessibility deteriorates
Solution Approach 1:
The patent implements feedback by having the AP collect and analyze diagnostic data from the STA, then use this information to identify and resolve onboarding issues. The AP acts as the analyzing entity, receiving diagnostic information from multiple STAs and using it to improve network performance and troubleshoot problems without requiring direct administrator access to individual client logs.
Solution Approach 2:
The patent applies self-service by enabling the AP to autonomously diagnose and resolve onboarding issues using diagnostic data collected from STAs. The system allows the network infrastructure to self-diagnose problems such as frozen TX conditions or EAP exchange failures without requiring external administrator intervention or access to client device logs.
3Adaptability or versatility
If multiple protocols are used for connectivity, then connection versatility is improved, but issue reproduction difficulty increases
Solution Approach 1:
The patent applies segmentation by breaking down the diagnostic data into structured elements that correspond to different protocol layers and connection phases. This structured approach allows the AP to analyze specific protocol interactions (EAP exchange, 4-way handshake, etc.) independently, making it easier to identify which protocol or phase is causing issues despite the complexity of multiple protocols being used.
Data Source
AI summary
Techniques are described for securely transmitting diagnostic data between a STA and an AP before the STA has successfully been on boarded at the AP. In the embodiments herein, the STA can use a key (e.g., a long-term key) to encrypt diagnostic data transmitted to the AP when the STA has not been on boarded by the AP. This key can be provided to the STA several different ways such as when the STA was provisioned to connect to a service set identifier (SSID) supported by the AP, or the STA may have previously associated with the SSID (e.g., by connecting to the same or another AP supporting the SSID during a previous session) and received or generated the key.