Communication Stream Watermarking for Vishing Detection
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Solution Overview
Problem
Vishing attacks, which involve fraudulent voice/video calls or messages purporting to be from legitimate sources, can lead to significant information loss and security breaches, as existing technologies struggle to differentiate between legitimate and fake communication streams.
Innovation Solution
Implementing session watermarks in communication sessions, which are unique to each session, to identify and authenticate legitimate communication streams, and using a watermark manager to verify the integrity of the communication streams, flagging potential vishing attempts by detecting spliced or manipulated content.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If session watermarks are implemented in communication sessions, then the ability to distinguish legitimate from fraudulent streams is improved, but the device complexity increases
Solution Approach 1:
Session watermarks are generated and embedded in communication streams before transmission occurs. The watermark manager pre-establishes the authentication mechanism by embedding unique session identifiers and cryptographic signatures into the media stream, allowing verification to happen automatically during playback or forwarding operations without requiring complex real-time analysis
Solution Approach 2:
A watermark manager acts as an intermediary component that handles watermark generation, embedding, and verification. This mediator abstracts the complex authentication logic from the main communication system, centralizing the security functionality in a dedicated module that manages watermark keys and validates stream integrity without requiring complex modifications throughout the entire system
2Measurement precision
If watermark verification is performed in real-time, then the detection speed of vishing attacks is improved, but the processing time increases
Solution Approach 1:
The watermark verification process extracts only the essential authentication elements (watermark signatures and session identifiers) from the full communication stream for analysis. Instead of verifying the entire stream in real-time, the system extracts and validates only the critical watermark portions, significantly reducing processing time while maintaining detection accuracy
Solution Approach 2:
The system performs partial verification by checking specific watermark markers at key intervals rather than continuously analyzing the entire stream. This partial action approach provides sufficient detection capability for security purposes while avoiding the computational overhead of complete real-time verification of all stream content
3Reliability
If session watermarks are embedded in all communication streams, then the security against deep fakes is improved, but the manufacturing complexity increases
Solution Approach 1:
The watermark manager implements a universal authentication mechanism that handles multiple communication types (voicemail, videomail, conference calls, instant messaging) through a single integrated system. This multi-functional approach embeds watermarks across all communication streams using the same core technology, improving security consistency while reducing implementation complexity compared to separate solutions for each communication type
Data Source
AI summary
A communication stream is received. For example, the communication stream may be a part of a communication session, such as, a voicemail, a videomail, a voice conference call, a video conference call, and/or the like. A determination is made if the communication stream is completely generated using a session watermark. The session watermark is associated with the communication session. In response to determining that the communication stream is completely generated using the session watermark, the communication stream is identified as a legitimate communication stream. In response to determining that the communication stream has not been completely generated using the session watermark, the communication stream is identified as potentially a vishing communication steam.