NEC had ten patents in blockchain during Q2 2024. NEC Corp filed patents in Q2 2024 for enhancing anonymous signature schemes, blockchain payments, secure electronic voting systems, and terminal authentication methods. The patents include methods for user-controlled linkability in signatures, secure fund transfers on blockchains, distributed storage of voting information, and authentication processes using electronic signatures and credit information. GlobalData’s report on NEC gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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NEC had no grants in blockchain as a theme in Q2 2024.
Recent Patents
Application: User-controlled linkability of anonymous signature schemes (Patent ID: US20240187255A1)
The patent filed by NEC Corp. describes a method to enhance an anonymous signature scheme with user-controlled linkability. The method involves a signer generating a signer-specific secret and a secret key, augmenting a message with a unique value related to the secret, signing the message with the secret key, producing a proof that multiple signed messages embed the same secret, and anonymously publishing the proof for verification by a third-party verifier. The method allows for user-controlled linkability in ring or group signature schemes, ensuring anonymity while providing the ability to link signatures when necessary.
The claims of the patent detail the steps involved in the method, including generating key pairs, publishing public keys, choosing public keys to protect the signer's identity, and verifying the linkage of signatures. The method utilizes cryptographic hash functions, discrete logarithms, and finite cyclic groups to ensure security and validity of the signatures. The patent also describes the application of the method in scenarios such as user asset transfers between service providers and targeted offers based on IoT device reports. Overall, the patent presents a comprehensive approach to enhancing anonymous signature schemes with user-controlled linkability, providing a secure and versatile solution for various applications.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
