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    This was brought to you by:

    block this user Sergei Skorobogatov Trusted member

    Senior Research Associate

    University of Cambridge, Computer Lab

    Optical Fault Induction Attacks

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    We describe a new class of attacks on secure microcontrollers and smartcards. Illumination of a target transistor causes it to conduct, thereby inducing a transient fault. Such attacks are practical; they do not even require expensive laser equipment. We have carried them out using a flashgun bought second-hand from a camera store for $30 and with an $8 laser pointer. As an illustration of the power of this attack, we developed techniques to set or reset any individual bit of SRAM in a microcontroller. Unless suitable countermeasures are taken, optical probing may also be used to induce errors in cryptographic computations or protocols, and to disrupt the processor's control flow. It thus provides a powerful extension of existing glitching and fault analysis techniques. This vulnerability may pose a big problem for the industry, similar to those resulting from probing attacks in the mid-1990s and power analysis attacks in the late 1990s. We have

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    Title : Optical Fault Induction Attacks
    Abstract : We describe a new class of attacks on secure microcontrollers and smartcards. Illumination of a target transistor causes it to conduct, thereby inducing a transient fault. Such attacks are practical; they do not even require expensive laser equipment. We have carried them out using a flashgun bought second-hand from a camera store for $30 and with an $8 laser pointer. As an illustration of the power of this attack, we developed techniques to set or reset any individual bit of SRAM in a microcontroller. Unless suitable countermeasures are taken, optical probing may also be used to induce errors in cryptographic computations or protocols, and to disrupt the processor's control flow. It thus provides a powerful extension of existing glitching and fault analysis techniques. This vulnerability may pose a big problem for the industry, similar to those resulting from probing attacks in the mid-1990s and power analysis attacks in the late 1990s. We have
    Subject : unspecified
    Area : Computer Science
    Language : English
    Affiliations : 
    Url : http://www.cl.cam.ac.uk/~sps32/ches02-optofault.pdf
    Doi : 10.1.1.9.5680

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