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Скачать с ютуб COSIC seminar "Attack on SHealS and HealS: the Second Wave of GPST" (Yi-Fu Lai, U. of Auckland) в хорошем качестве

COSIC seminar "Attack on SHealS and HealS: the Second Wave of GPST" (Yi-Fu Lai, U. of Auckland) 2 года назад


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COSIC seminar "Attack on SHealS and HealS: the Second Wave of GPST" (Yi-Fu Lai, U. of Auckland)

COSIC seminar – Attack on SHealS and HealS: the Second Wave of GPST – Yi-Fu Lai (University of Auckland) An important problem is to have an efficient and secure static-static key exchange protocol or public-key encryption (PKE) from isogenies/SIDH. We cryptanalyse the isogeny-based public key encryption schemes SHealS and HealS, and the key exchange scheme HealSIDH of Fouotsa and Petit from Asiacrypt 2021. The work was claimed to be immune to any adaptive attack and give the first secure static-static isogeny PKE from a SIDH-like scheme. We refute the claim by presenting an adaptive attack, aka the Second Wave of GPST, against the protocols and make the problem open again.

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