Scan-based attacks on linear feedback shift register based stream ciphers

—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.

• Type: Journal
• Year: 2011
• Where: TODAES
• Authors: Yu Liu, Kaijie Wu, Ramesh Karri
• Keywords: Linear Feedback Shift Registers, Scan Chain Structure, Stream Cipher Implementations, TODAES 2011