Nomura Research Institute. has filed a patent for a service provision system involving secret sharing methods for secure data distribution between clients and servers. The system ensures user verification and service delivery via network communication. GlobalData’s report on Nomura Research Institute gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Nomura Research Institute, Virtual banking assistant was a key innovation area identified from patents. Nomura Research Institute's grant share as of January 2024 was 22%. Grant share is based on the ratio of number of grants to total number of patents.
Secure service provision system using secret sharing method
The patent application (Publication Number: US20230370252A1) describes a service provision system that enables the provision of services to a user's first device through one or more second devices via a network. The system involves a share provision unit in the first device that acquires a verifiable credential (VC) from a storage unit, divides it into shares using a secret sharing method, and distributes these shares to the second devices. Additionally, a group synchronization unit in the first device manages group ID information related to the VCs returned from the second devices, facilitating the decryption of a secret calculation result for the service. The second devices, in turn, include a share acquisition unit, a verification processing unit for grouping VCs based on ID information, and a group synchronization unit for returning group ID information to the first device.
Furthermore, the system's share provision unit separates private and non-private information in the VC, with the non-private information divided into shares in plaintext using the secret sharing method. Notably, the non-private information is strategically placed within the shares to ensure efficient decryption of the VC. Specifically, the non-private information may include format details within the VC, and the verification processing unit in the second device validates that the private information in the share aligns with the defined format information. This innovative approach enhances data security and privacy in service provision systems, ensuring that sensitive information is protected while enabling seamless access to services across multiple devices.
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