Audio Fingerprint Device Pairing via Harmonic Verification
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Solution Overview
Problem
Traditional cryptographic methods for secure device pairing in computing devices are unsuitable for spontaneous associations in untrustworthy environments, as they lack a common point of trust and require complex authentication methods that are not user-friendly or hardware-efficient.
Innovation Solution
A method using human-perceptible signals, such as audio stimuli, to authenticate device associations by computing a fingerprint of a common key and emitting audio sequences that are either harmonious or discordant based on the key, allowing users to verify the association securely without complex hardware or interfaces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional cryptographic authentication methods are used for device pairing, then security can be established through key exchange protocols, but the complexity of authentication increases and user-friendliness decreases
Solution Approach 1:
The patent introduces an auxiliary out-of-band channel as an intermediary for authentication. This channel uses human-perceptible signals (audio, visual, or tactile) to convey authentication information between devices. The intermediary channel bridges the gap between cryptographic key exchange and user verification, allowing secure authentication without requiring users to understand or manage complex cryptographic protocols directly.
Solution Approach 2:
The patent replaces traditional mechanical/complex cryptographic authentication interfaces with human sensory-based verification. Instead of requiring users to manually configure security settings or verify complex key exchanges, the system substitutes these mechanical interactions with perceptible signals that users can naturally detect and verify through their senses, thereby simplifying the authentication process while maintaining security.
2Reliability
If auxiliary out-of-band channels are implemented for authentication, then security against Man-in-the-Middle attacks is improved, but device complexity and hardware requirements increase
Solution Approach 1:
The patent employs universally available hardware facilities that can serve multiple functions. For example, the audio output device normally used for media playback is also utilized for transmitting authentication signals. The display device used for user interface presentation also conveys authentication information. This multi-functionality approach allows secure authentication without adding dedicated hardware components, thereby reducing device complexity while maintaining security.
3Reliability
If complex authentication methods are used to prevent security breaches, then security is improved, but the bandwidth requirements and information transmission needs increase
Solution Approach 1:
The patent extracts only the essential authentication information needed for verification and transmits it through the auxiliary channel. Rather than transmitting complete cryptographic keys or extensive authentication data, the system extracts and conveys only the critical fingerprint or verification token that confirms successful key exchange. This extraction approach minimizes the quantity of information transmitted while maintaining adequate security verification.
Data Source
AI summary
A device and/or method for allowing authorization of computing device association using human-perceptible signals includes forming an association between a computing device and a further computing device. The computing device computes a fingerprint of a common key derived during the forming of the association and emits a first audio stimuli based upon the computed fingerprint. The first audio stimuli is at least one octave number apart from a second audio stimuli of the further computing device emitted by the further computing device based upon the common key.