Ad-hoc Group Creation Using Contextual Matching and Time Windows
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Solution Overview
Problem
Existing collaborative applications require complex user interactions and pre-existing trust relationships for dynamic group creation, making them cumbersome for non-technical users and inefficient for ad-hoc collaborations where group lifetime is short.
Innovation Solution
Ad-hoc group creation based on contextual information, where devices provide contextual information to a group server for matching and credential verification, allowing quick and secure inclusion without pre-existing trust relationships, using a simple two-button process and time-limited access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If complex authentication mechanisms with pre-existing trust relationships are used for dynamic group creation, then security and confidentiality are improved, but user operation complexity and setup time increase significantly
Solution Approach 1:
The patent introduces a group server as an intermediary that manages group creation and membership. The server receives contextual information from devices, performs matching operations, and coordinates credential distribution. This mediator handles the complex authentication logic centrally, allowing individual devices to use simple operations while maintaining strong security through server-mediated trust establishment.
Solution Approach 2:
The system performs preliminary actions by pre-establishing trust relationships with the group server before ad-hoc group formation. Devices authenticate with the server in advance, obtaining credentials that enable secure peer-to-peer communication. This preliminary authentication phase separates the complex security setup from the actual group creation process, making the user experience simple while maintaining security.
2Reliability
If pre-existing trust relationships and credential distribution mechanisms are implemented, then security guarantees are improved, but group formation time and registration requirements increase
Solution Approach 1:
The patent enables devices to autonomously generate their own credentials and prove their identity to the group server without requiring manual registration or pre-established trust relationships with other group members. Each device independently authenticates with the server using self-service mechanisms, and the server automatically verifies credentials and manages group membership. This eliminates time-consuming manual setup while maintaining security through automated verification.
Solution Approach 2:
The system changes the authentication parameter from requiring pre-existing trust relationships between devices to requiring only contextual information matching and server-verified credentials. By changing the authentication basis from interpersonal trust to server-mediated contextual verification, the system dramatically reduces group formation time while maintaining security guarantees through cryptographic proof of identity and authorization.
3Reliability
If manual credential exchange through out-of-band channels is used, then authentication security is improved, but user interaction complexity and process duration increase
Solution Approach 1:
The patent replaces the mechanical process of manual credential exchange through out-of-band channels (physical handover, voice communication, etc.) with an automated electronic system. The group server electronically distributes credentials to authorized devices and verifies identities through automated authentication protocols. This substitution eliminates the need for complex manual coordination while maintaining or improving security through cryptographic verification and centralized credential management.
Data Source
AI summary
Provided is ad-hoc creation of groups based on contextual information comprising. Two mechanisms are used to restrict valid members of a group. First, to make sure that devices are somehow related, devices provide contextual information that is compared to the contextual information provided by other devices willing to join the group. Only devices providing “similar” contextual information are accepted as possible candidates in the group. Second, to scope the group, a time window is used to limit the duration of the group creation. In other words, access to the group is reserved to the devices that can provide similar context information to existing member of the group in a defined time window. Security properties are ensured by enabling a visual check of the list of group participants. For instance, a member can verify that the displayed pictures indeed represent the attendees of an ongoing meeting.