MUMBAI, India, Sept. 28 -- Intellectual Property India has published a patent application (202611081802 A) filed by Credenta Technologies Private Limited on July 02, 2026, for Integrated Attested Physiological Authentication System.

Inventors include Kumar, Ravit; and Mann, Sakshi.

The application for the patent was published on September 25, 2026, under issue no. 39/2026.

Abstract: An integrated physiological authentication system acquires photoplethysmographic or electrocardiographic signals and processes them through a quality-gated atomic pipeline under a failure-to-abstain contract. A five-component composite signal quality index (signal-to-noise, peak stability, accelerometer-video coherence, direct- current drift, contact brightness) is operatively coupled to a signal-quality-adaptive state estimation filter, whose measurement noise covariance is scaled inversely to the index. An adaptive circadian personalisation module blends demographic-stratified priors with per-bucket online statistics. A manipulation detection module identifies breath-holding and respiratory sinus arrhythmia suppression in short scans. A context-aware module fuses Hidden Markov Model autonomic state posteriors with transaction metadata. A cryptographic attestation module signs a structured measurement packet using a hardware-backed non-exportable key and records it in a forward-chained encrypted audit log. The pipeline returns one of four structured abstention codes on any quality, manipulation, duration, or signing failure.

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