Secure Synchronization Group Invalid Participant Detection
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Solution Overview
Problem
In synchronization systems, non-participant devices that have lost their private keys cause performance issues, power consumption problems, and security concerns, as they are not effectively removed from the synchronization group, leading to cluttered user interfaces and potential security vulnerabilities.
Innovation Solution
A method is introduced where each device uses a unique device synchronization group identifier, generated from a device-specific identifier, which remains persistent and encrypted, allowing devices to rejoin the group without revealing their identity, enabling the detection and removal of non-participant members by comparing encrypted identifiers, thus ensuring secure and efficient group management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If devices use public keys to join the synchronization group, then device identification and secure communication are enabled, but non-participant devices cannot be effectively removed from the group
Solution Approach 1:
The device identification is segmented into two independent components: a public key for cryptographic communication and a persistent encrypted identifier for group membership management. This segmentation allows the system to maintain reliable device identification through public keys while enabling effective device removal by managing the separate encrypted identifier, resolving the contradiction between identification reliability and removal capability.
Solution Approach 2:
An encrypted device identifier acts as an intermediary between the public key system and the group membership management. This intermediary allows the system to maintain public key security while enabling effective device removal, as the encrypted identifier can be independently managed and removed from the group without affecting the cryptographic security model.
2Device complexity
If non-participant devices remain in the synchronization group, then the system maintains simplicity in device management, but performance and power consumption deteriorate
Solution Approach 1:
The system performs preliminary actions by maintaining an updated list of valid device encrypted identifiers in the synchronization group. This preliminary validation mechanism allows devices to quickly determine whether a target device is still active before initiating synchronization, preventing wasted performance on non-participant devices while maintaining simple management through the centralized identifier list.
3Loss of information
If old devices are displayed in the user interface, then the interface shows complete device history, but security awareness and threat detection capability decrease
Solution Approach 1:
The user interface applies local quality differentiation by displaying active devices with full visibility and non-participant devices with distinct visual indicators or exclusion from certain views. This allows the interface to preserve device history information while simultaneously enhancing security awareness by making it easy to distinguish between active and inactive devices, helping users quickly identify potential security threats.
Data Source
AI summary
A method of identifying invalid participants in a synchronization group. The method generates a device synchronization group identifier (DSGI) for a first device from a device-specific key of the first device. The method joins the first device in the synchronization group by using the DSGI of the first device. Prior to the joining of the first device, the synchronization group stores a set of DSGIs of a set of devices that have joined the synchronization group. The method determines that a particular DSGI stored in the synchronization group is the same as the DSGI of the first device. The method identifies the particular DSGI stored in the synchronization group as a DSGI of an invalid participant of the synchronization group.