모바일 애플리케이션 프로세서의 JTAG 보안 기법

다국어 초록 (Multilingual Abstract)

In this paper, we suggest a practical and flexible system architecture for JTAG (Joint Test Action Group) protection of application processors. From the view point of security, the debugging function through JTAG port can be abused by malicious users, so the internal structures and important information of application processors, and the sensitive information of devices connected to an application processor can be leak. This paper suggests a system architecture that disables computing power of computers used to attack processors to reveal important information. For this, a user authentication method is used to improve security strength by checking the integrity of boot code that is stored at boot memory, on booting time. Moreover for user authorization, we share hardwired secret key cryptography modules designed for functional operation instead of hardwired public key cryptography modules designed for only JTAG protection; this methodology allows developers to design application processors in a cost and power effective way. Our experiment shows that the security strength can be improved up to 2¹?? x 0.6second when using 160-bit secure hash algorithm.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 기존 연구
• 3. 시스템 구조
• 4. 메시지 다이제스트 기법을 이용한 사용자 인증
• 5. 권한 인증
• 6. 분석
• 7. 결론
• 참고문헌
• 저자소개

참고문헌 (Reference)

1 원동호, "현대 암호학" 도서출판 그린 2006

2 주학수, "고속 암호연산 프로세서 개발현황" 12 (12): 48-56, 2002

3 A. Ashkenazi, "Security Features in the i.MX31 and i.MX31L Multimedia Applications Processors"

4 "Proven Security IP for Next-Generation SOCs"

5 R.F. Buskey, "Protected JTAG" 405-414, 2006

6 J. Grand, "Practical Secure Hardware Design for Embedded Systems" 2004

7 "IEEE Standard Test Access Port and Boundary-Scan Architecture, IEEE Standard 1149.1, 2001"

8 ARM, "Designing with TrustZone - Hardware Requirements"

9 B. Schneier, "Applied cryptography, 1996"

10 "Am29LV800D datasheet"