Cryptology ePrint Archive: Report 2009/584

Scan-based Attacks on Linear Feedback Shift Register Based Stream Ciphers

Yu Liu, Kaijie Wu, and Ramesh Karri

Abstract: In this paper, we present an attack on stream cipher implementations by determining the scan chain structure of the linear feedback shift registers in their implementations. Although scan Design-for-Test (DFT) is a powerful testing scheme, we show that it can be used to retrieve the information stored in a crypto chip thus compromising its theoretically proven security.

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Date: received 16 Nov 2009

Contact author: yliu58 at uic edu

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Version: 20091201:051441 (All versions of this report)

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