Tatsuaki Okamoto

This inventor holds 30 USPTO granted patents, plus 2 CIPO patents and 12 EPO patents, primarily in Cryptographic Systems. Top assignees: Nippon Telegraph and Telephone Corporation, Mitsubishi Electric Corporation, Nippon Telegraph and Telephone Public Corporation. Active years: 1986-2024.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Tatsuaki Okamoto. Retrieved from https://idiyas.com/inventor/tatsuaki-okamoto

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

USPTO Granted Patents = 30

% Patents Active = 96.7

CIPO Patents = 2

EPO Patents = 12 (Patent Applications = 13)

Average Co-Inventor Count = 2.2

ph-index = 14

Forward Citations = 1,512(Granted Patents)

Location History:

Yokosuka, JP (1986 - 1999)
Kanagawaken, JP (2000)
Musashino, JP (2016)
Tokyo, JP (2001 - 2024)

Company Filing History:

28 out of 5,300

Nippon Telegraph and Telephone Corporation

patents

14 out of 16,602

Mitsubishi Electric Corporation

patents

1 out of 522

Nippon Telegraph and Telephone Public Corporation

patents

4. 1 out of 2

Telegraph and Telephone Corporation

patents

where one patent can have more than one assignee

Years Active: 1986-2024

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Areas of Expertise:

Cryptographic System

Key Generation Device

Encryption Device

Decryption Device

Signature Device

Verification Device

Electronic Cash

Cryptographic Method

Signature Processing

Digital Signatures

Public-Key Cryptosystems

Authentication System

30 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 11909873 - Decryption device, cryptographic system, and decryption method (2024-02-20),

2. 11888968 - Signature device, verification device, signature method, verification method, and computer readable medium (2024-01-30),

3. 9722783 - Cryptographic system (2017-08-01),

4. 9413531 - Cryptographic system, cryptographic method, cryptographic program, and decryption device (2016-08-09),

5. 9407438 - Cryptographic system, cryptographic method, and cryptographic program (2016-08-02),

6. 9385867 - Cryptographic processing system, key generation device, encryption device, decryption device, key delegation device, cryptographic processing method, and cryptographic processing program (2016-07-05),

7. 9203622 - Cryptographic processing system, cryptographic processing method, cryptograhpic processing program, and key generation device (2015-12-01),

8. 9183411 - Cryptographic processing system, key generation device, encryption device, decryption device, cryptographic processing method, and cryptographic processing program utilizing attribute information for generation of a key for decryption or encryption (2015-11-10),

9. 9106408 - Signature processing system, key generation device, signature device, verification device, signature processing method, and signature processing program (2015-08-11),

10. 8938623 - Cryptographic processing system, key generation device, encryption device, decryption device, cryptographic processing method, and cryptographic processing program (2015-01-20),

11. 8929542 - Cryptographic processing system, key generation device, key delegation device, encryption device, decryption device, cryptographic processing method, and cryptographic processing program (2015-01-06),

12. 8913742 - Cryptographic processing system, key generation device, encryption device, decryption device, signature processing system, signature device, and verification device (2014-12-16),

13. 8577030 - Cryptographic processing system, key generation device, key delegation device, encryption device, decryption device, cryptographic processing method, and cryptographic processing program (2013-11-05),

14. 8559638 - Cryptographic processing system (2013-10-15),

15. 8458478 - Signature generating apparatus, signature verifying apparatus, and methods and programs therefor (2013-06-04),

Title: The Innovative Contributions of Tatsuaki Okamoto

Introduction

Tatsuaki Okamoto, a prominent inventor based in Tokyo, Japan, has significantly impacted the fields of encryption and cryptography. With an impressive portfolio of 30 patents, his work showcases a deep understanding of complex systems and secure communications.

Latest Patents

Okamoto's latest innovations include a decryption device, cryptographic system, and decryption method. His encryption device generates ciphertext by integrating a predicate vector of arithmetic branching programs (ABP) with an attribute vector over dual bases in vector spaces, enhancing encryption methods. The accompanying key generation device produces a decryption key by utilizing the remaining predicate vector and attribute vector. Moreover, his decryption device specializes in decrypting ciphertext by executing a pairing operation between the ciphertext and the decryption key. Additionally, he developed a signature device that acquires a signature key positioned over dual bases and generates signatures for messages by incorporating predicate information from arithmetic branching programs. The generated signature is then validated through a verification device.

Career Highlights

Throughout his career, Tatsuaki Okamoto has worked with leading corporations including Nippon Telegraph and Telephone Corporation and Mitsubishi Electric Corporation. His roles in these organizations have allowed him to pioneer advancements in cryptographic technologies and contribute to secure communication systems.

Collaborations

Okamoto has collaborated with notable colleagues, including Katsuyuki Takashima and Kazuo Ohta. These partnerships have fostered an environment of innovation, driving the development of cutting-edge cryptographic solutions.

Conclusion

Tatsuaki Okamoto's contributions to the field of encryption and cryptographic systems exemplify the importance of innovation in technology. His numerous patents not only reflect his expertise but also promise to enhance security measures in digital communication, marking him as a vital figure in contemporary cryptographic research.

Profile summary based on public USPTO records.