Location History:
- Ota, JP (2008)
- Macbashi, JP (2011)
- Maebashi, JP (2006 - 2012)
Company Filing History:
10 out of 16,453 
2 out of 27,375 
Years Active: 2006-2012
Title: Keiko Yamamichi: Innovator in Digital Work Protection Systems
Introduction
Keiko Yamamichi is a prominent legal representative and inventor based in Maebashi, Japan. She has made significant contributions to the field of digital work protection, holding a total of 12 patents. Her innovative work focuses on developing systems that prevent illegitimate use of digital content.
Latest Patents
Among her latest patents are a digital work protection system, a recording apparatus, a reproduction apparatus, and a recording medium designed to prevent unauthorized access to content. The recording medium is equipped with an inherent number stored in an unrewritable area. The recording apparatus is capable of writing media key data and encrypted content onto the recording medium. This media key data includes encrypted media keys generated for both unrevoked and revoked reproduction apparatuses. The reproduction apparatus can decrypt the encrypted media key using a device key, ensuring that the content remains secure.
Another notable patent involves a parameter generation apparatus that generates parameters to avoid decryption errors in an NTRU cryptosystem. This apparatus facilitates secure communication between encryption and decryption devices. It includes a provisional parameter generation unit that creates provisional parameters based on pre-defined error condition information, and an output parameter generation unit that produces output parameters that do not cause decryption errors.
Career Highlights
Keiko has worked with renowned companies such as Panasonic Corporation and Matsushita Electric Industrial Co., Ltd. Her experience in these organizations has allowed her to refine her skills and contribute to significant advancements in technology.
Collaborations
Throughout her career, Keiko has collaborated with notable individuals, including Motoji Ohmori and Satomi Yamamichi, who is also a legal representative. These collaborations have further enriched her work and expanded her impact in the field.
Conclusion
Keiko Yamamichi's innovative contributions to digital work protection systems and her extensive patent portfolio highlight her as a leading figure in her field. Her work continues to influence the way digital content is secured and protected.