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Rev

$\begingroup$ If I understand correctly, you're saying that KEMs using Fujisaki-Okamoto construction should be immune from the attack? $\endgroup$

twisteroid ambassador
– twisteroid ambassador

2026-02-28 10:18:31 +00:00
Commented 17 hours ago
$\begingroup$ @twisteroidambassador Assuming they're built sans mathematical loopholes like that subgroup thing. $\endgroup$

DannyNiu
– DannyNiu

2026-02-28 11:13:27 +00:00
Commented 16 hours ago
2

$\begingroup$ I do not believe that Fujisaki-Okamoto protects against malicious public keys. What it protects against are malicious ciphertexts. The FO transform is run by the decapsulator (Bob in your example); this attack is against Alice, who does not perform it. $\endgroup$

poncho
– poncho ♦

2026-02-28 12:52:06 +00:00
Commented 15 hours ago
$\begingroup$ @poncho Clarified my intent. $\endgroup$

DannyNiu
– DannyNiu

2026-03-01 02:24:38 +00:00
Commented 1 hour ago

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