Improved Fault Analysis of Signature Schemes

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Provided by: University of Brighton
Topic: Security
Format: PDF
In this paper, the authors show that the fault attack described is much more efficient than originally claimed. They proved that, using the same attack model, they need 34.3% less faulty signatures to recover a 160-bit private key. Furthermore, by improving the fault model expression, they show that for some key values they obtain another improvement of up to 47.1%. Finally, they show that there is no optimal way of performing the exhaustive search in order to reduce the computation complexity of this step.
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