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Online Template Attack on ECDSA:
[chapter]
<span title="">2020</span>
<i title="Springer International Publishing">
<a target="_blank" rel="noopener" href="https://fatcat.wiki/container/2w3awgokqne6te4nvlofavy5a4" style="color: black;">Lecture Notes in Computer Science</a>
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We retrieve the ephemeral private key from the power trace of a single scalar multiplication in an ECDSA signature generation and from that the signing private key using an online template attack. The innovation is that we generate the profiling traces using ECDSA signature verification on the same device. The attack can be prevented by randomization of the (projective) coordinates of the base point.
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