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For the Inventor, By the Inventor

Tokyo, Japan

Kazuhiko Minematsu

This inventor holds 25 USPTO granted patents and 13 published patent applications and 2 EPO patents, primarily in Encryption Technology. Top assignees: Nec Corporation, Nrc Corporation. Active years: 2004-2025.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kazuhiko Minematsu. Retrieved from https://idiyas.com/inventor/kazuhiko-minematsu

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 25 

% Patents Active = 84.0

 

Average Co-Inventor Count = 1.2

ph-index = 3

Forward Citations = 54(Granted Patents)


Company Filing History:

goldMedal24 out of 36,718 
 
Nec Corporation
 patents
silverMedal1 out of 10 
 
Nrc Corporation
 patents

Years Active: 2004-2025

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Areas of Expertise:
Memory Processing
Authenticated Encryption
Message Authentication
Random Number Generation
Encryption Device
Verification Apparatus
Block Cipher
Digital Watermark Detection
Hash Function
Format-Preserving Encryption
MAC Tag Generation
Decoding Apparatus
25 patents (USPTO):Explore Patents
1. 12328397 - Memory processing apparatus, memory verification apparatus, memory updating apparatus, memory protection system, method, and computer readable medium (2025-06-10),
2. 11824993 - MAC tag list generation apparatus, MAC tag list verification apparatus, method, and program (2023-11-21),
3. 11750398 - MAC tag list generation apparatus, MAC tag list verification apparatus, aggregate MAC verification system and method (2023-09-05),
4. 11728968 - Authenticated encryption device, authenticated decryption device, authenticated encryption method, authenticated decryption method, authenticated encryption program, and authenticated decryption program (2023-08-15),
5. 11579845 - Random number generation device, random number generation method, encryption device, and non-transitory recording medium (2023-02-14),
6. 11463235 - Encryption device, encryption method, program, decryption device, and decryption method (2022-10-04),
7. 11336456 - Message authentication system, apparatus, and message verification method (2022-05-17),
8. 11327719 - Random number generation method selecting system, random number generation method selecting method, and random number generation method selecting program (2022-05-10),
9. 11257399 - Decoding apparatus, decoding method, and program (2022-02-22),
10. 11251965 - Authentication tag generation apparatus, authentication tag verification apparatus, method and program (2022-02-15),
11. 11216533 - Inverse-image sampling device, inverse-image sampling method, and inverse-image sampling program (2022-01-04),
12. 10623176 - Authentication encryption method, authentication decryption method, and information-processing device (2020-04-14),
13. 10355862 - MAC tag list generating apparatus, MAC tag list verifying apparatus, MAC tag list generating method, MAC tag list verifying method and program recording medium (2019-07-16),
14. 10341088 - Authentic encryption device, authenticated encryption method, and program for authenticated encryption (2019-07-02),
15. 9787475 - Device, method, and program for message authentication tag generation (2017-10-10),

Title: Kazuhiko Minematsu: Innovator in MAC Tag Technology

Introduction

Kazuhiko Minematsu, located in Tokyo, Japan, is an accomplished inventor with a notable record of 24 patents. His innovative work primarily revolves around the development of apparatuses and methods related to Message Authentication Codes (MAC) that enhance data security in digital communications.

Latest Patents

Minematsu's latest patents include advancements in MAC tag list generation and verification. One of his key inventions is the MAC tag list generation apparatus, which includes a message input part and a group testing matrix generation part that handles parameters for combinatorial group testing. This apparatus is designed to generate a MAC tag list using a decodable linear group testing mechanism. Furthermore, he has developed a MAC tag list verification apparatus that improves the integrity of the MAC generation process by utilizing nonce values and pseudorandom functions, reinforcing the security measures involved in the MAC generation.

Career Highlights

Kazuhiko Minematsu's professional journey includes significant contributions while working at NEC Corporation and NRC Corporation. His role in these organizations allowed him to apply his expertise in secure communication technologies, leading to his impressive portfolio of patents.

Collaborations

Throughout his career, Minematsu has collaborated with notable colleagues, including Yuki Tanaka and Norifumi Kamiya. These partnerships have fostered a dynamic exchange of ideas, furthering innovation in the field of digital security and MAC technologies.

Conclusion

Kazuhiko Minematsu's impact on the field of data security through his inventive patents underscores his status as a leading inventor in Tokyo. His advancements in MAC technologies not only enhance digital communication security but also pave the way for future innovations in the industry.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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