Signed Contact Lists for Video Conference Participant Authentication
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Solution Overview
Problem
Existing video conferencing systems lack robust mechanisms to authenticate participants, making it difficult to ensure that participants are who they claim to be, especially in confidential meetings, and impersonation can go undetected.
Innovation Solution
Implementing signed contact lists that allow users to verify the identities of participants by generating identity records with cryptographic signatures and appending them to a user contact list, enabling verification based on this list during video conferences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If video conferencing systems allow participants to join without strict authentication, then ease of operation is improved, but reliability deteriorates due to impersonation risks
Solution Approach 1:
The system performs preliminary authentication by generating and signing contact lists before the video conference begins. Participants' identity information is collected, cryptographically signed by the video conference server, and distributed to all participants in advance, establishing trust before the actual meeting occurs.
Solution Approach 2:
The video conference server acts as an intermediary that issues signed contact lists to participants. This intermediary provides cryptographic verification of participant identities without requiring direct authentication between participants, enabling easy joining while maintaining security through the trusted third-party server.
2Reliability
If video conferencing systems implement strict authentication mechanisms, then reliability is improved, but device complexity worsens due to additional verification systems
Solution Approach 1:
The complex authentication logic is extracted from participant devices and centralized on the video conference server. The server handles identity verification, contact list generation, and cryptographic signing, while participant devices only need to display and verify the signed information, significantly reducing device complexity.
Solution Approach 2:
Instead of requiring participants to implement complex verification systems, the system creates simplified copies of authenticated identity information in the form of signed contact lists. These copies contain all necessary verification data in an easily consumable format that reduces computational requirements on participant devices.
3Reliability
If video conferencing systems use cryptographic verification for all participants, then security is improved, but loss of time increases due to verification processing
Solution Approach 1:
Cryptographic verification is performed in advance when the contact list is generated and signed by the server before the video conference begins. During the actual meeting, participants simply display and compare the pre-verified signed contact lists, eliminating real-time cryptographic processing and reducing verification time to minimal display operations.
Data Source
AI summary
Systems and methods for user authentication in video conferences using signed contact lists are provided. A client device associated with a user joins a video conference hosted by a video conference provider. The video conference has a plurality of participants. The client device receives participant information for each participant of the plurality of participants. The client device verifies at least one participant of the plurality of participants by comparing the participant information with a contact list associated with the user. The client device updates a contact record corresponding to the at least one participant in the contact list. The contact record includes video conference information, at least a portion of the participant information, and a cryptographic signature.