Location History:
- Kanagawa-ken, JP (1998)
- Tokyo, JP (2006)
- Kanagawa, JP (2004 - 2010)
Company Filing History:
Years Active: 1998-2010
Title: Kenji Shirakawa: Innovator in Microprocessor Technology
Introduction
Kenji Shirakawa is a prominent inventor based in Kanagawa, Japan. He has made significant contributions to the field of microprocessor technology, holding a total of 13 patents. His innovative work focuses on enhancing the security and efficiency of microprocessors in multi-task environments.
Latest Patents
One of his latest patents is a microprocessor with a program and data protection function under a multi-task environment. This invention allows the microprocessor to handle a program key for decrypting a program and a data key for encrypting and decrypting data as a cryptographically inseparable pair. This design enables the microprocessor to protect processes executing the program without the intervention of the operating system, thereby concealing secret information from both user programs and the operating system itself.
Another notable patent is a microprocessor with an improved task management and table management mechanism. This tamper-resistant microprocessor features a task state table that assigns a task identifier to tasks that can take multiple states. It also includes a task register for storing the identifier of the currently executed task and an interface for reading encrypted programs from external memory. The encryption processing unit generates unique decryption keys for different cache lines, ensuring secure access to the content stored in the cache memory.
Career Highlights
Kenji Shirakawa is associated with Kabushiki Kaisha Toshiba, a leading company in the technology sector. His work at Toshiba has been instrumental in advancing microprocessor technology, particularly in areas related to security and task management.
Collaborations
Throughout his career, Kenji has collaborated with notable colleagues, including Mikio Hashimoto and Kensaku Fujimoto. These collaborations have contributed to the development of innovative technologies and solutions in the field of microprocessors.
Conclusion
Kenji Shirakawa's contributions to microprocessor technology have significantly impacted the industry. His innovative patents reflect a commitment to enhancing security and efficiency in computing environments. His work continues to influence the future of microprocessor design and functionality.