Recording Hardware
Our hardware is designed to be used on the premise that it connects to a smartphone as a Bluetooth device.
Tamper-Resistant Design
Our device ensures authenticity through hardware security:
Secure Element chip stores cryptographic keys and controls signing operations.
Device generates a unique key-pair during first-time initialization.
Keys never leave the Secure Element, preventing extraction or duplication.
Time-Locked Recording Process
A fundamental principle: At least n hours are required to push n hours of data
The recording process follows a strict protocol:
Device retrieves a unique nonce from Solana program (
init)Audio is captured in fixed n-minute blocks.
Secure Element signs each block with a time-locked signature.
*Device ensures signing process cannot be called multiple times within n-minute.
On-chain verification checks that
received_audio_hours ≤ elapsed_hours_since_init
Device can only emit one signature per n minutes, enforcing real-time progression. (processed within Secure Element)
High-Fidelity Capture
The hardware includes specialized components for quality recording:
Dual high-frequency stereo microphones. (used for fraud protection as well)
Extended frequency response. (up to 48kHz)
Challenge Tone Speaker. (Secure Element generates random ultrasonic sequences that must be captured in the recording.)
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