MUMBAI, India, May 29 -- Intellectual Property India has published a patent application (202641061069 A) filed by Dayananda Sagar College Of Engineering, Bangalore, Karnataka, on May 14, for 'a layered quantum-secure architecture for central bank digital currency integrating quantum key distribution, post-quantum cryptography, and byzantine fault-tolerant consensus.'
Inventor(s) include Velcia Mendonca; Deepap; Teena Srinivasan; Vignesh; Somesh R S; and Sapna P J.
The application for the patent was published on May 29, under issue no. 22/2026.
According to the abstract released by the Intellectual Property India: "The current invention discloses a four-layer quantum protected and secure architecture for a Central Bank Digital Currency (CBDC) system. This system is cryptographically secure again both classical and quantum computing related attacks. Threats arising from Shor's algorithms as well as the Harvest-Now-Decrypt-Later (HNDL) attacks are resilient to this system as it doesn't rely on any single cryptographic layer for its overall security. The four layers are: information-theoretic session key secrecy, computational quantum-resistant cryptographic protection, Byzantine fault-tolerant distributed ledger operations, and quantum-safe encrypted key storage respectively. The system architecture is built such that even if there is a compromise of one whole layer, there is no trade-off in the overall security of the system. The novel structural contribution includes a secure key storage architecture backed up by quantum algorithms wherein a database compromise alone is insufficient to recover the protected keys, an authentication based on post-quantum mechanism which includes linear message complexity, a verifiable quantum-safe leader election implementation, a combined security guarantee with the help of a dual-path session architecture system and a highly confidential lattice-based homomorphic scheme for digital currency transactions."
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