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Frontside Versus Backside Laser Injection: A Comparative Study

Frontside Versus Backside Laser Injection: A Comparative Study Frontside Versus Backside Laser Injection: A Comparative Study STEPHAN DE CASTRO, LIRMM JEAN-MAX DUTERTRE, ENSMSE, LSAS, CMP Gardanne BRUNO ROUZEYRE, GIORGIO DI NATALE, and MARIE-LISE FLOTTES, LIRMM The development of cryptographic devices was followed by the development of so-called implementation attacks, which are intended to retrieve secret information exploiting the hardware itself. Among these attacks, fault attacks can be used to disturb the circuit while performing a computation to retrieve the secret. Among possible means of injecting a fault, laser beams have proven to be accurate and powerful. The laser can be used to illuminate the circuit either from its frontside (i.e., where metal interconnections are first encountered) or from the backside (i.e., through the substrate). Historically, frontside injection was preferred because it does not require the die to be thinned. Nevertheless, due to the increasing integration of metal layers in modern technologies, frontside injections do not allow targeting of any desired location. Indeed, metal lines act as mirrors, and they reflect and refract most of the energy provided by the laser beam. Conversely, backside injections, although more difficult to set up, allow an increase of the resolution of the target location and remove the drawbacks of the http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png ACM Journal on Emerging Technologies in Computing Systems (JETC) Association for Computing Machinery

Frontside Versus Backside Laser Injection: A Comparative Study

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Publisher
Association for Computing Machinery
Copyright
Copyright © 2016 by ACM Inc.
ISSN
1550-4832
DOI
10.1145/2845999
Publisher site
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Abstract

Frontside Versus Backside Laser Injection: A Comparative Study STEPHAN DE CASTRO, LIRMM JEAN-MAX DUTERTRE, ENSMSE, LSAS, CMP Gardanne BRUNO ROUZEYRE, GIORGIO DI NATALE, and MARIE-LISE FLOTTES, LIRMM The development of cryptographic devices was followed by the development of so-called implementation attacks, which are intended to retrieve secret information exploiting the hardware itself. Among these attacks, fault attacks can be used to disturb the circuit while performing a computation to retrieve the secret. Among possible means of injecting a fault, laser beams have proven to be accurate and powerful. The laser can be used to illuminate the circuit either from its frontside (i.e., where metal interconnections are first encountered) or from the backside (i.e., through the substrate). Historically, frontside injection was preferred because it does not require the die to be thinned. Nevertheless, due to the increasing integration of metal layers in modern technologies, frontside injections do not allow targeting of any desired location. Indeed, metal lines act as mirrors, and they reflect and refract most of the energy provided by the laser beam. Conversely, backside injections, although more difficult to set up, allow an increase of the resolution of the target location and remove the drawbacks of the

Journal

ACM Journal on Emerging Technologies in Computing Systems (JETC) – Association for Computing Machinery

Published: Dec 6, 2016

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