Wireless Accessory Advertising Encryption for Location Privacy
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Solution Overview
Problem
Accessory devices broadcasting advertising packets that include additional information beyond device information can expose personal information of users when connected to untrusted neighboring devices.
Innovation Solution
Implementing a system where an electronic device receives a first decryption key to encrypt and decrypt advertising packets, registers as a friend device with a server, and transmits decrypted information to protect personal information and enhance location accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the accessory device includes additional information in the advertising packet, then the location identification accuracy is improved, but the personal information security deteriorates
Solution Approach 1:
The advertising packet is divided into two parts: a first advertising packet containing only device information (device identifier, device type) and a second advertising packet containing encrypted additional information (rich data). This segmentation allows untrusted devices to access basic location info while preventing exposure of personal information unless the device is trusted and has the decryption key.
Solution Approach 2:
A server acts as an intermediary between the accessory device and neighboring devices. The server receives the first decryption key from the accessory device, stores it, and provides it to trusted neighboring devices. This intermediary mechanism enables location identification while controlling access to encrypted personal information through key management.
2Measurement precision
If the accessory device broadcasts advertising packets with additional information, then the location identification capability is improved, but the information security deteriorates
Solution Approach 1:
Different parts of the advertising packet have different security properties. The first advertising packet is publicly accessible and contains only non-sensitive device information. The second advertising packet with rich data is encrypted and accessible only to trusted devices with the decryption key. This local quality differentiation maintains location identification capability while protecting personal information.
3Object-affected harmful factors
If the electronic device transmits decrypted advertising packet information to the server, then the personal information protection is improved, but the device complexity increases
Solution Approach 1:
The accessory device autonomously manages the encryption and decryption process. It generates and transmits the first decryption key to the server, and automatically decrypts the second advertising packet for trusted devices. This self-service approach reduces the need for complex centralized control while maintaining information security.
Data Source
AI summary
The present disclosure provides methods and electronic devices for performing wireless communication with an accessory device. In some embodiments, an electronic device includes a wireless communication circuit, a memory, and a processor. The processor is configured to execute instructions to receive, from at least one server through the wireless communication circuit, a first decryption key. The processor is further configured to receive, from an accessory device through the wireless communication circuit, an advertising packet. At least one portion of the advertising packet is encrypted with a first encryption key. The processor is further configured to decrypt the at least one portion of the advertising packet with the first decryption key. The processor is further configured to transmit, to the at least one server through the wireless communication circuit, information comprised in the decrypted advertising packet. The first decryption key corresponds to the first encryption key.