Cryptology ePrint Archive: Report 2015/595

Differential Fault Intensity Analysis

Nahid Farhady Ghalaty and Bilgiday Yuce and Mostafa Taha and Patrick Schaumont

Abstract: óRecent research has demonstrated that there is no sharp distinction between passive attacks based on sidechannel leakage and active attacks based on fault injection. Fault behavior can be processed as side-channel information, offering all the benefits of Differential Power Analysis including noise averaging and hypothesis testing by correlation. This paper introduces Differential Fault Intensity Analysis, which combines the principles of Differential Power Analysis and fault injection. We observe that most faults are biased - such as single-bit, two-bit, or three-bit errors in a byte - and that this property can reveal the secret key through a hypothesis test. Unlike Differential Fault Analysis, we do not require precise analysis of the fault propagation. Unlike Fault Sensitivity Analysis, we do not require a fault sensitivity profile for the device under attack. We demonstrate our method on an FPGA implementation of AES with a fault injection model. We find that with an average of 7 fault injections, we can reconstruct a full 128-bit AES key

Category / Keywords: applications / Fault Analysis; AES; Fault Injection; Fault Intensity

Original Publication (in the same form): 2014 Workshop on Fault Diagnosis and Tolerance in Cryptography

Date: received 15 Jun 2015, withdrawn 22 Jun 2015

Contact author: farhady at vt edu

Available format(s): (-- withdrawn --)

Version: 20150622:105148 (All versions of this report)

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