MUMBAI, India, Oct. 5 -- Intellectual Property India has published a patent application (202641114776 A) filed by Vardhaman College Of Engineering on September 25, 2026, for System And Method For Secure Multimodal Biometric Authentication.
Inventors include Dr. Praveen Oggu; Ms. Chelpuri Hemalatha; Mr. Avari Nagaraju; Mr. Kadambala Chaitanya; Ms. Tarini Jahnavi; and Dr. Indrajeet Sahu.
The application for the patent was published on October 02, 2026, under issue no. 40/2026.
Abstract: CLAIMS We Claim: 1. A system for secure multimodal biometric authentication, comprising: a plurality of biometric acquisition modules configured to acquire biometric signals corresponding to a plurality of biometric modalities from a subject; a biometric preprocessing module configured to process the acquired biometric signals and generate modality-specific biometric feature representations; a biometric quality and liveness evaluation module configured to determine a biometric quality state and a liveness state associated with each biometric modality; an authentication uncertainty estimator configured to generate an intermediate authentication uncertainty state based on at least biometric matching confidence, the biometric quality state, the liveness state and a sensor-reliability state; an adaptive modality-and-challenge orchestration module configured to dynamically select a subsequent biometric modality and generate a session-specific challenge according to the intermediate authentication uncertainty state; a cross-modal temporal consistency engine configured to determine temporal correspondence between biometric responses acquired from at least two different biometric modalities in response to the session-specific challenge; a revocable biometric token generation module configured to generate protected modality-specific biometric tokens from the biometric feature representations using a revocable transformation parameter; a cross-modal token binding module configured to bind the protected modality-specific biometric tokens with a session identifier, a challenge parameter and a temporal state to generate a session-bound multimodal authentication token; and a risk-adaptive fusion engine configured to generate an authentication state based on at least the biometric matching confidence, liveness state, cross-modal temporal consistency and sensor-reliability state. 2. The system as claimed in claim 1, wherein the adaptive modality-and-challenge orchestration module is configured to select the subsequent biometric modality from at least face, fingerprint, iris, voice, palm, hand geometry or behavioral biometric modalities, and wherein the subsequent biometric modality is selected according to a determined authentication uncertainty, biometric quality condition, sensor-reliability condition or attack indicator. 3. The system as claimed in claim 1, wherein the cross-modal temporal consistency engine is configured to generate a temporal relationship vector representing respective challenge issuance time, biometric response initiation time, biometric response completion time and an inter-modality response interval, and to identify a replayed, synthesized or independently captured biometric response when the temporal relationship vector fails a session-specific consistency condition. 4. The system as claimed in claim 1, further comprising a sensor-reliability and attack-isolation controller configured to distinguish a sensor degradation condition from an attack condition using at least signal quality, liveness confidence, matching inconsistency, replay indicators and abnormal signal characteristics, and selectively isolate a corresponding biometric modality contribution or cause the adaptive modality-and-challenge orchestration module to activate an additional biometric modality. 5. The system as claimed in claim 1, wherein the revocable biometric token generation module is configured to generate a first protected biometric token using a first transformation parameter and generate a replacement protected biometric token using a second transformation parameter upon revocation of the first protected biometric token, without requiring modification of a physical biometric characteristic of the subject, and wherein the session-bound multimodal authentication token is invalidated upon expiration or termination of the corresponding authentication session. 6. A method for secure multimodal biometric authentication, comprising: receiving an authentication request and establishing an authentication session having a session identifier, an initial biometric modality parameter and a challenge-generation parameter; acquiring an initial biometric signal from a subject through a first biometric modality; determining biometric quality, liveness, matching confidence and sensor reliability associated with the initial biometric signal; generating an intermediate authentication uncertainty state from the determined biometric quality, liveness, matching confidence and sensor reliability; dynamically selecting a second biometric modality and generating a session-specific challenge according to the intermediate authentication uncertainty state; acquiring a challenge response through the second biometric modality while the subject performs the session-specific challenge; determining cross-modal temporal consistency between the initial biometric signal and the challenge response; generating protected biometric representations corresponding to the first and second biometric modalities; binding the protected biometric representations with the session identifier, the session-specific challenge and a temporal state to generate a session-bound multimodal authentication token; and generating an authentication decision based on risk-adaptive fusion of the biometric matching, liveness, temporal-consistency and sensor-reliability information. 7. The method as claimed in claim 6, wherein dynamically selecting the second biometric modality comprises determining an uncertainty value for the first biometric modality and selecting the second biometric modality according to at least one of the uncertainty value, biometric quality, environmental sensing condition, sensor reliability, computational resource availability and detected attack indicator. 8. The method as claimed in claim 6, wherein generating the session-specific challenge comprises generating a non-repeating challenge parameter associated with the authentication session, presenting the challenge parameter to the subject, acquiring a first challenge response through a first biometric modality and a second challenge response through a second biometric modality, and determining whether the first challenge response and the second challenge response occur within a session-specific temporal relationship. 9. The method as claimed in claim 6, further comprising determining whether a biometric modality contribution corresponds to sensor degradation, environmental interference, replay, spoofing or anomalous biometric behaviour; selectively excluding the biometric modality contribution when the biometric modality contribution is determined to be unreliable or anomalous; and activating an additional biometric modality or generating an additional session-specific challenge when an authentication confidence condition remains unsatisfied. 10. The method as claimed in claim 6, further comprising transforming each biometric feature representation using a revocable transformation parameter to generate a modality-specific protected biometric token; binding the modality-specific protected biometric tokens with a session identifier, challenge identifier and temporal state; validating freshness and token-version continuity of the resulting session-bound multimodal authentication token; invalidating the session-bound multimodal authentication token upon completion or termination of the authentication session; and storing protected token references and non-identifying session metadata without persistently storing raw biometric samples.
Disclaimer: Curated by HT Syndication.
