Scan Based Side Channel Attacks on Stream Ciphers and Their Counter-Measures
INDOCRYPT '08 Proceedings of the 9th International Conference on Cryptology in India: Progress in Cryptology
Scan-based attack against elliptic curve cryptosystems
Proceedings of the 2010 Asia and South Pacific Design Automation Conference
Secure and testable scan design using extended de Bruijn graphs
Proceedings of the 2010 Asia and South Pacific Design Automation Conference
Secure scan design using shift register equivalents against differential behavior attack
Proceedings of the 16th Asia and South Pacific Design Automation Conference
STEP: a unified design methodology for secure test and IP core protection
Proceedings of the great lakes symposium on VLSI
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Scan chains are exploited to develop attacks on cryptographic hardware and steal intellectual properties from the chip. This paper proposes a secured strategy to test designs by inserting a certain number of inverters between randomly selected scan cells. The security of the scheme has been analyzed. Two detailed case studies of RC4 stream cipher and AES block cipher have been presented to show that the proposed strategy prevents existing scan-based attacks in the literature. The elegance of the scheme lies in its less hardware overhead.