, Volume 1, Issue 1, pp 71-77
Date: 25 Feb 2011

Synchronization method for SCA and fault attacks

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Abstract

This paper shows how effectiveness of side-channel and fault attacks can be improved for devices running from internal clock sources. Due to frequency instability of internally clocked chips, attacking them was always a great challenge. A significant improvement was achieved by using a frequency injection locking technique via the power supply line of a chip. As a result, the analysis of a semiconductor chip can be accomplished with less effort and in shorter time. Successful synchronization was demonstrated on a secure microcontroller and a secure FPGA. This paper presents research into limits for synchronization and discusses possible countermeasures against frequency injection attacks.