SoundAuth — Secure, Seamless AI Agent Communication via Sound
AI authentication through advanced data-over-sound technology. Secure, frictionless, and ready for tomorrow's Agentic world
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What is SoundAuth
SoundAuth is a protocol for secure authentication and encrypted communication for AI voice agents using advanced data-over-sound technology
As AI Voice agents become ubiquitous, they will interact with each other in the wild. However their current interaction is limited by natural language. Soundauth is a protocol based on MIT NANDA protocol which enables voice agents to authenticate each other and establish a secure and efficient communication link using data over sound.
In Action
Watch the demo below to see SoundAuth in action:
Key Features
Authentication
Agents exchange credentials verified via X.509 cryptographic certificates.
Validation can occurs via decentralized identity verification systems (NANDA’s distributed authentication layer).
Advanced Security
Robust protection against replay and impersonation attacks with proprietary sound-based protocols.
Upon identity confirmation, a secure session key is established using ephemeral keys for secure communication.
JSON based metadata
Agents can communicate their capabilities through JSON-based metadata, facilitating dynamic discovery and interaction among agents
Encrypted Communication
Supports secure, bidirectional communication between AI agents. Agents can continue to communicate using data over sound or switch to peer to peer web-socket or Https link.
How SoundAuth Works
Discovery
Voice agents discover each other.
Credential Exchange
Exchange X.509 certificates.
Verification
Verify identity via decentralized registry
Secure Access
Establish encryption key
Communication Communicate securely via the best-fit channel.
Use Cases and Applications
Phone-based Agent Authentication
Secure AI voice agent verification during calls using inaudible sound frequencies. Enables identity verification before exchanging sensitive information or processing transactions, all without human intervention.
Inter-Agent Negotiations
Secure communications for AI agents negotiating on behalf of users. Establishes trusted channels with cryptographic identity proof, protecting negotiations from impersonation attacks.
Secure Voice Transactions
Enhanced security for financial transactions between voice agents. Verifies identities before processing payments or sharing sensitive data, adding a layer of protection beyond traditional authentication.
Multi-Agent Collaboration
Security framework for AI voice agent teams. Enables trusted group formation and secure communication in real-time voice environments without disrupting conversation flow.
Developer Resources & Community
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Community Support
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MIT NANDA Protocol
What is data over sound
Data over Sound transmits digital information via audio signals, either audible or inaudible (ultrasonic). This allows devices with basic speakers and microphones to exchange data without Wi-Fi, Bluetooth, or NFC.
Use Cases
  • Secure Authentication: Device verification through encoded sound signals.
  • Agent-to-Agent Communication: AI agents authenticating over voice calls.
  • IoT and Device Provisioning: Connects smart devices without manual pairing.
  • Payments and Access Control: Transmits encrypted credentials via sound.
Underlying Technology
  • Modulation & Demodulation: Data encoded into and decoded from sound waves
  • Encryption: 2-way encryption secures data.
  • Error Correction: Maintains accuracy in noisy environments.
Advantages
  • Efficient: Supports HTTPS, TCP/IP and UDP
  • Offline Friendly: Functions without internet connectivity.
  • Secure & Private: Difficult to intercept or manipulate.
Deploy SoundAuth for seamless, secure voice authentication in your environment.