Wi-Fi STA Identifier Opt-In During 4-Way Handshake Privacy Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Wireless networks assign identifiers that enable tracking without user consent, diminishing privacy enhancements and allowing monitoring even with changing MAC addresses, and new identifiers are correlated across associations.
Innovation Solution
A station (STA) can opt-in or opt-out of being identified by the access point (AP) through a Device Identifier Key Data Encapsulation (KDE) mechanism during the 4-way handshake protocol, allowing users to control data collection and deletion of identifiers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wireless networks assign identifiers to enable tracking, then network management and user identification capability is improved, but user privacy is worsened
Solution Approach 1:
The patent implements dynamic identifier assignment where the network can switch between permanent identifiers (for normal operation) and temporary identifiers (for privacy protection). The identifier type changes based on user preferences and network policies, allowing the system to adapt between tracking capability and privacy protection modes.
Solution Approach 2:
The patent changes the identifier parameter itself by introducing temporary identifiers that differ from permanent MAC addresses. This parameter change allows the network to maintain identification functionality while protecting user privacy, as temporary identifiers cannot be correlated to track user behavior across different sessions.
2Measurement precision
If permanent identifiers are used for reliable user identification, then identification accuracy is improved, but tracking capability is worsened
Solution Approach 1:
The system dynamically switches between permanent identifiers (when identification accuracy is needed) and temporary identifiers (when tracking prevention is needed). This dynamic approach allows the same system to provide both high identification accuracy and tracking protection at different times based on user preferences.
Solution Approach 2:
The patent extracts the identification function from the permanent MAC address by introducing temporary identifiers. This separation allows the permanent identifier to be used only when necessary for accurate identification, while temporary identifiers handle routine communications without enabling tracking.
3Object-affected harmful factors
If temporary identifiers are assigned frequently to protect privacy, then privacy protection is improved, but network overhead is worsened
Solution Approach 1:
Instead of continuously changing identifiers, the system uses periodic action by assigning temporary identifiers for specific durations or until certain events occur. This reduces the frequency of identifier changes and associated network overhead while still providing privacy protection during each temporary identifier's valid period.
Solution Approach 2:
The patent applies partial action by using temporary identifiers only when privacy protection is required, rather than continuously. This selective approach reduces network overhead compared to frequent identifier changes, while still achieving privacy protection when needed.
Data Source
AI summary
Embodiments are disclosed for station (STA) identifier opt-in. Some embodiments include a STA that can associate with an access point (AP) of a wireless network, where the STA is configured to opt-in to being identified by the AP. The STA can transmit a first message 2 (M2) of a 4-way handshake protocol during the association, where the first M2 includes a Device Identifier (ID) Key Data Encapsulation (KDE) that includes an Opt-in Control field, where a first value of the Opt-in Control field indicates the STA opts-in to being identified by the AP. The STA can receive a first message 3 (M3) of the 4-way handshake protocol including a Device ID KDE and an ID Blob, where the ID Blob corresponds to the STA. The STA can communicate with the AP, where the first value enables the AP to collect data about the STA during the communication.