Secure scan design with dynamically configurable connection

Research output: Chapter in Book/Report/Conference proceedingConference contribution

16 Citations (Scopus)

Abstract

Scan test is a powerful test technique which can control and observe the internal states of the circuit under test through scan chains. However, it has been reported that it's possible to retrieve secret keys from cryptographic LSIs through scan chains. Therefore new secure test methods are required to satisfy both testability and security requirements. In this paper, a secure scan design is proposed to achieve adequate security requirement as a countermeasure against scan-based attacks, while still maintain high testability like normal scan testing. In our method, the internal scan chain is divided into several sub chains, and the connection order of sub chains can be dynamically changed. In addition, how to decide the connection order of those sub chains so that it can't be identified by an attacker is also proposed in this paper. The proposed method is implemented on an AES circuit to show its effectiveness, and a security analysis is also given to show how the proposed approach can be used as a countermeasure against those known scan-based attacks.

Original languageEnglish
Title of host publicationProceedings - 2013 IEEE 19th Pacific Rim International Symposium on Dependable Computing, PRDC 2013
PublisherIEEE Computer Society
Pages256-262
Number of pages7
ISBN (Print)9780769551302
DOIs
Publication statusPublished - 2013 Jan 1
Event19th IEEE Pacific Rim International Symposium on Dependable Computing, PRDC 2013 - Vancouver, BC, Canada
Duration: 2013 Dec 22013 Dec 4

Publication series

NameProceedings of IEEE Pacific Rim International Symposium on Dependable Computing, PRDC
ISSN (Print)1541-0110

Conference

Conference19th IEEE Pacific Rim International Symposium on Dependable Computing, PRDC 2013
CountryCanada
CityVancouver, BC
Period13/12/213/12/4

Keywords

  • AES
  • scan chain
  • scan-based attack
  • secure scan design

ASJC Scopus subject areas

  • Computational Theory and Mathematics
  • Computer Science Applications
  • Hardware and Architecture
  • Software

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