Hyungyu Lee

Title: Innovations of Hyungyu Lee in Function Pointer Protection

Introduction

Hyungyu Lee is a notable inventor based in Seoul, South Korea. He has made significant contributions to the field of computer security, particularly in the protection of function pointers and control-flow integrity. With a total of 2 patents, his work focuses on enhancing the security of computer programs against various vulnerabilities.

Latest Patents

Hyungyu Lee's latest patents include innovative systems and methods for function pointer protection through function symbol encryption. This invention provides an apparatus, method, and computer program product designed to encrypt function symbols with relocation. The system comprises a compiler module, a static linker module, and an encryptor module. The compiler module is responsible for inserting sequences of instructions to decrypt function symbols that are randomized at runtime before indirect function calls. Additionally, it encrypts an operand register that receives a local function symbol in position-independent code (PIC). The static linker module inserts an encoding section at link time, which includes two columns representing the sizes of function symbols and their memory locations. The encryptor module then encrypts the function symbols at runtime based on the information in the encoding section.

Another significant patent by Hyungyu Lee is focused on dynamic reencryption of code pointers. This system and method aim to protect the control-flow of a computer program against manipulation and leaks of code pointers during execution. The system includes a memory where the program is loaded and a processor that executes it. The method involves providing a shadow stack for each process and thread, where each code pointer is encrypted with a corresponding encryption key. The reencryption process occurs at runtime, ensuring that the encryption state of the code pointer is renewed when entering vulnerable code regions.

Career Highlights

Hyungyu Lee is currently employed at Zeus Sw Defender, LLC, where he continues to develop innovative security solutions. His work is instrumental in advancing the field of cybersecurity, particularly in protecting software from exploitation.

Collaborations

Hyungyu collaborates with talented individuals such as Gyungho Lee and Changwoo Pyo, contributing to a dynamic and innovative work environment.

Conclusion

Hyungyu Lee's contributions to the field of computer security through his patents on function pointer protection and dynamic reencryption of code pointers highlight his expertise and commitment to innovation. His work plays a crucial role in enhancing the security of computer programs against potential threats.