MUMBAI, India, July 24 -- Intellectual Property India has published a patent application (202641067307 A) filed by Psna College Of Engineering And Technology on May 29, 2026, for Zero Footprint Edge Authentication: A Localised Disposable Biometric Lock For Guest Accomodation Pri.
Inventors include Dr. K. R. Aravind Britto; Rijul Vishnu R; Sakthirohan S; Naveen Kumar R; and Nandha Kumar J.
The application for the patent was published on July 17, 2026, under issue no. 29/2026.
Abstract: The present invention relates to a standalone, serverless, cancelable biometric door lock system for guest accommodatio11 facilities, wherein the complete authentication pipeline executes on a resourceconstrained ESP32-S3 microcontroller [103] without cloud infrastructure, external servers, or network connectivity. The system eliminates persistent biometric exposure through a zero-tootprint volatlie memory model: raw biometric data exists solely in volatile SRAM for the duration of hash computation and is irreversibly destroyed thereafter. Upon enrollment, a 512-byte feature vector[202] from the AS608 optical fingerprint sensor[l06] undergoes mean-centered coarsening and seed-based random projection via O(N) inner product operations to produce a I 024-bit non-invertible Bio-hash[206]. The raw feature vector, projection matrix[204], and seed are immediately destroyed from SRAM, leaving only the Biohash in non-volatile storage. At guest checkout, the token is erased and a cryptographically unlinkable token is reissued under a new projection seed, ensuring zero residual biometric exposure across successive guests. Lock actuation is performed via a relay- driven solenoid lock[l05].
Disclaimer: Curated by HT Syndication.
