MUMBAI, India, Aug. 17 -- Intellectual Property India has published a patent application (202641096844 A) filed by Qunu Labs Private Limited on August 11, 2026, for A Cryptographic System And Method For Establishing Cryptographic Keys Using Classical Communication.
Inventors include K Rajesh Kumar; Dilip Kumar Singh; Sheroy Cooper; Sunil K Gupta; and Mr. Piyush Mohapatra.
The application for the patent was published on August 14, 2026, under issue no. 33/2026.
Abstract: Disclosed are method and cryptographic system (101) for establishing cryptographic keys between communicating nodes. The cryptographic system generates at first communicating node (103) and second communicating node (105), random data by performing quantum physical process locally at each node. The generated random data is processed using quantum-resistant extraction process to obtain uniform random bit sequence forming local key material at both nodes. Classical coordination data is exchanged between first communicating node and second communicating node over digital communication network (115) using cryptographically secure digital protocol. Corresponding cryptographic keys are established at each node by processing the local key material in accordance with the exchanged coordination data. The established cryptographic keys are made available for cryptographic operations including encryption, decryption, authentication, and secure session establishment. The cryptographic system enables quantum-resistant key establishment over existing digital communication networks without transmitting secret key material. FIG. 1
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