Toward Provable Security in Anamorphic Extension: New Constructions and Analysis↗ (원문, 새 창)

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Anamorphic encryption (AE) enables covert communication in adversarial settings where the receiver’s secret key may be exposed to a coercive adversary. Although existing AE constructions demonstrate the feasibility of this paradigm, their covert bandwidth rates are severely limited, particularly when built from conventional public-key encryption (PKE) schemes. This work develops a systematic approach to constructing bandwidth-efficient anamorphic extensions of residuosity-based PKEs. We first p