Paul Stewart Yosim

Title: Paul Stewart Yosim: Innovator in Hardware Security

Introduction

Paul Stewart Yosim is a notable inventor based in Boulder, CO (US). He has made significant contributions to the field of hardware security, holding a total of 3 patents. His work focuses on methods and devices that enhance the protection of information in integrated circuits and multimedia workstations.

Latest Patents

Yosim's latest patents include a "Method and apparatus for resisting hardware hacking through internal register interface." This invention provides methods and apparatus that allow restricted access to internal registers of an integrated circuit (IC) device via an interface. During the manufacturing process, unrestricted access may be permitted for testing purposes. Once testing is complete, the device can be placed in a restricted access mode, such as by blowing a master 'lock' fuse, to prevent unauthorized access to internal registers. However, full or partial access can still be granted through an access code or 'combination lock' that bypasses the master fuse lock.

Another significant patent is the "Device for protecting selected information in multi-media workstations." In this invention, the display buffer of a multimedia workstation is divided into a display section and a non-display section. The information intended for display is organized in the display section, while an image or shadow of this section is stored in the non-display section, referred to as a lock buffer. Before updating the display section, a controller reads protection data from the lock buffer and generates control signals to inhibit writing data into protected areas of the display section.

Career Highlights

Yosim is currently employed at International Business Machines Corporation (IBM), where he continues to innovate in the field of hardware security. His work has been instrumental in developing technologies that protect sensitive information from unauthorized access.

Collaborations

Throughout his career, Yosim has collaborated with notable colleagues, including William Robert Lee and David W Nuechterlein. These collaborations have contributed to the advancement of his inventions and the overall field of hardware security.

Conclusion

Paul Stewart Yosim is a distinguished inventor whose work in hardware security has led to significant advancements in protecting sensitive information. His innovative patents and contributions to IBM highlight his commitment to enhancing security in technology.