A public key algorithm reconfigurable circuit

CN122293329APending Publication Date: 2026-06-26FUDAN UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
FUDAN UNIVERSITY
Filing Date
2026-04-03
Publication Date
2026-06-26

AI Technical Summary

Technical Problem

Due to the limited performance of integrated CPUs, low-power general-purpose security chips for the Internet of Things (IoT) struggle to efficiently implement complex public-key cryptographic algorithms, resulting in excessively large chip areas and high power consumption, making it difficult to meet the performance requirements of information security systems.

Method used

Employing a multi-level reconfigurable NTT circuit, combined with coarse/sub-coarse granular reconfigurable circuits and a microcontroller, the basic operational structure of public-key algorithms is optimized through the NTT algorithm. A flexible hardware implementation circuit is designed to support both traditional and quantum-resistant cryptographic algorithms.

Benefits of technology

It achieves a public key algorithm engine that is small in size and highly flexible, can meet the performance requirements of IoT information security systems, and has a high cost-performance ratio.

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Abstract

This invention discloses a reconfigurable circuit for public-key cryptography algorithms. This circuit combines coarse / sub-coarse-grained reconfigurable circuits with microcontroller circuits. The sub-coarse-grained reconfigurable unit array employs a reconfigurable multiplier array from a multi-level reconfigurable NTT circuit to support NTT's underlying modular arithmetic. The coarse-grained reconfigurable units, through parameter configuration and data interconnection configuration, are used to implement large integer modular exponentiation and elliptic curve scalar multiplication. Based on the novel multi-level reconfigurable NTT circuit provided in this invention, quantum-resistant cryptographic algorithms can be implemented while also supporting traditional public-key cryptographic algorithms, thus offering advantages such as a small algorithm engine area and high flexibility.
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