A cryptography core tolerant to DFA fault attacks

Carlos Roberto Moratelli, Ï Cota, Marcelo Soares Lubaszewski
2006 Proceedings of the 19th annual symposium on Integrated circuits and systems design - SBCCI '06  
This work describes a hardware approach for the concurrent fault detection and error correction in a cryptographic core. It has been shown in the literature that transient faults injected in a cryptographic core can lead to the revelation of the encryption key using quite inexpensive equipments. This kind of attack is a real threat to tamper resistant devices like Smart Cards. To tackle such attacks, the cryptographic core must be immune to transient faults. In this work the DES algorithm is
more » ... en as a vulnerable cryptosystem case study. We show how an attack against DES is performed through a fault injection campaign. Then, a countermeasure based on partial hardware replication is proposed and applied to DES. Experimental results show the efficiency of the proposed scheme to protect DES against DFA fault attacks. Furthermore, the proposed solution is independent of implementation, and can be applied to other cryptographic algorithms, such as AES.
doi:10.1145/1150343.1150393 dblp:conf/sbcci/MoratelliCL06 fatcat:oqabgjroingu7noaxo6y4gfq5u