Welcome to the resource topic for 2021/1558
Title:
RSA Key Recovery from Digit Equivalence Information
Authors: Chitchanok Chuengsatiansup, Andrew Feutrill, Rui Qi Sim, and Yuval Yarom
Abstract:The seminal work of Heninger and Shacham (Crypto 2009) demonstrated a method for reconstructing secret RSA keys from artial information of the key components. In this paper we further investigate this approach but apply it to a different context that appears in some side-channel attacks. We assume a fixed-window exponentiation algorithm that leaks the equivalence between digits, without leaking the value of the digits themselves. We explain how to exploit the side-channel information with the Heninger-Shacham algorithm. To analyse the complexity of the approach, we model the attack as a Markov process and experimentally validate the accuracy of the model. Our model shows that the attack is feasible in the commonly used case where the window size is 5.
ePrint: https://eprint.iacr.org/2021/1558
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