Hybrid spectro-morse acoustic authentication system and method
An audio authentication and identity verification system and method that encodes dynamic cryptographic information across the audible and inaudible spectrum (0 Hz→30 kHz, scalable to 124 kHz). A rolling acoustic signature simultaneously embeds identity, time, date, and GPS location using a hybrid of frequency shift keying (FSK), phase shift keying (PSK), Morse style pulse duration modulation, and time domain multiplexing. To guarantee post-event privacy and integrity, the system further incorporates a dual custody audio architecture in which every authenticated recording is split into complementary bit interleaved segments stored separately, and the decryption key is fragmented via Shamir 3-of-5 secret sharing—preventing unilateral access or tampering. The system establishes a tamper proof, real time, and offline capable authentication layer that functions in air, through conventional microphones, and via dedicated emitter hardware.
1 . A method for audio authentication and identity verification, comprising:
emitting an inaudible audio signature, wherein the inaudible audio signature includes a unique identifier, a time, a date, and a set of location coordinates;
modulating the inaudible audio signature using one or more modulation schemes selected from amplitude modulation, frequency modulation, phase modulation, pulse-duration modulation, frequency-shift keying (FSK), phase-shift keying (PSK), or any combination thereof;
encoding the inaudible audio signature within an audio content by overlaying the inaudible audio signature as at least one carrier at a lane-center frequency or as a set of carriers within a designated band of the audio content, wherein a payload encodes at least one of the unique identifier, the time, the date, or the set of location coordinates as a direct alphanumeric symbol mapped to at least one tone and/or at least one pulse duration;
splitting the encoded audio content into at least two complementary bit segments, storing one of the at least two complementary bit segments on a device, and storing one of the at least two complementary bit segments in a cloud database;
decrypting, via a decryption key, the at least two complementary bit segments; and
recording a decryption event on an immutable ledger.
2 . The method of claim 1 , further comprising shifting the inaudible audio signature across multiple sub-bands within the full 0 Hz-124 kHz spectrum.
3 . The method of claim 1 , wherein the inaudible audio signature further includes a date-of-birth.
4 . The method of claim 1 , further comprising storing the inaudible audio signature as uncompressed audio as a high-resolution WAV file at 48 kHz or higher.
5 . The method of claim 1 , further comprising concealing the inaudible audio signature by applying acoustic dithering, noise shaping, and randomized scheduling to the inaudible audio signature.
6 . The method of claim 1 , further comprising mapping the unique identifier directly to acoustic symbols, including, to the at least one tone and/or the at least one pulse duration without hashing.
7 . A system for audio authentication and identity verification, comprising:
a near-field communication (NFC)-enabled piezoelectric emitter device operable to playback or emit an inaudible audio signature, wherein the inaudible audio signature includes a unique identifier, a time, a date, and a set of location coordinates; and
a dual custody and shared key privacy architecture;
wherein the system is operable to modulate the inaudible audio signature using one or more modulation schemes selected from amplitude modulation, frequency modulation, phase modulation, pulse-duration modulation, frequency-shift keying (FSK), phase-shift keying (PSK), or any combination thereof,
wherein an audio content is encoded with the inaudible audio signature by overlaying the inaudible audio signature as at least one carrier at a lane-center frequency or a set of carriers within a designated band of the audio content;
wherein the dual custody and shared key privacy architecture is operable to split the encoded audio content into at least two complementary bit segments, wherein one of the at least two complementary bit segments is stored on a device, and wherein one of the at least two complementary bit segments is stored in a cloud database; and
wherein the audio content is operable to be verified by verifying the identity, the time, the date, and the set of location coordinates of the encoded inaudible audio signature.
8 . The system of claim 7 , wherein the inaudible audio signature is stored as uncompressed audio including as a high-resolution WAV file at 48 kHz or higher.
9 . The system of claim 7 , further comprising an anti-jamming module operable to shift the inaudible audio signature across multiple sub-bands within the full 0 Hz-124 kHz spectrum.
10 . The system of claim 7 , wherein the inaudible audio signature further includes a date-of-birth.
11 . The system of claim 7 , wherein parity blocks and watermark fragments are embedded into the inaudible audio signature.
12 . A method for audio authentication and identity verification, comprising:
emitting an inaudible audio signature, wherein the inaudible audio signature includes a unique identifier, a time, a date, and a set of location coordinates;
modulating the inaudible audio signature using one or more modulation schemes selected from amplitude modulation, frequency modulation, phase modulation, pulse-duration modulation, frequency-shift keying (FSK), phase-shift keying (PSK), or any combination thereof,
encoding the inaudible audio signature within an audio content by overlaying the inaudible audio signature as a single-line carrier at lane-center frequency onto frequency carriers of the audio content into the ultrasonic band;
splitting the encoded audio content into at least two complementary bit segments, storing one of the at least two complementary bit segments on a device, and storing one of the at least two complementary bit segments in a cloud database;
decrypting, via a decryption key, the at least two complementary bit segments, wherein the decryption key is partitioned into five shards using a 3-of-5 Shamir secret sharing scheme;
recording a decryption event on an immutable ledger;
decoding the inaudible audio signature via at least one of band-pass filtering, time-frequency analysis including fast Fourier transform analysis, short-time Fourier transform analysis, or Goertzel analysis, envelope or correlation detection, phase retrieval, checksum validation, and/or error-detecting validation; and
verifying the audio content by verifying the identity, time, date, and location data of the encoded inaudible audio signature.
13 . The method of claim 12 , wherein the time-frequency analysis further comprises a Goertzel filter bank tuned to expected carriers.
14 . The method of claim 12 , wherein the inaudible audio signature further includes a date-of-birth.
15 . The method of claim 12 , further comprising storing the inaudible audio signature as uncompressed audio at a high-resolution WAV file at 48 kHz or higher.