Loop-Abort Faults on Supersingular Isogeny Cryptosystems

Abstract : Cryptographic schemes based on supersingular isogenies have become an active area of research in the field of post-quantum cryptography. We investigate the resistance of these cryptosystems to fault injection attacks. It appears that the iterative structure of the secret isogeny computation renders these schemes vulnerable to loop-abort attacks. Loop-abort faults allow to perform a full key recovery, bypassing all the previously introduced validation methods. Therefore implementing additional countermeasures seems unavoidable for applications where physical attacks are relevant.
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Submitted on : Tuesday, July 25, 2017 - 10:52:33 AM
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Alexandre Gélin, Benjamin Wesolowski. Loop-Abort Faults on Supersingular Isogeny Cryptosystems. 8th International Conference on Post-Quantum Cryptography (PQCrypto 2017), Jun 2017, Utrecht, Netherlands. pp.93-106, ⟨10.1007/978-3-319-59879-6_6⟩. ⟨hal-01568331⟩

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