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Title:
Correlation Electromagnetic Analysis on an FPGA Implementation of CRYSTALS-Kyber
Authors: Rafael Carrera Rodriguez, Florent Bruguier, Emanuele Valea, Pascal Benoit
Abstract:Post-quantum cryptography represents a category of cryptosystems resistant to quantum algorithms. Recently, NIST launched a process to standardize one or more of such algorithms in the key encapsulation mechanism and signature categories. Such schemes are under the scrutiny of their mathematical security, but they are not side-channel secure at the algorithm level. That is why their side-channel vulnerabilities must be assessed by the research community. In this paper, we present a non-profiled correlation electromagnetic analysis against an FPGA implementation of the chosen NIST key-encapsulation mechanism standard, CRYSTALS-Kyber. The attack correlates an electromagnetic radiation model of the polynomial multiplication execution with the captured traces. With 166,620 traces, this attack correctly recovers 100% of the subkeys. Furthermore, a countermeasure is presented for securing the target implementation against the presented attack.
ePrint: https://eprint.iacr.org/2022/1361
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