Collusion-Resistant Asymmetric Anamorphic Encryption: Framework, Generic Construction, and Concrete Instantiations

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(Receiver) anamorphic encryption enables covert communication through innocent-looking ciphertexts, even against a dictator that compels users to surrender their private decryption keys. In this work, we study the asymmetric form, where the covert channel operates in a manner analogous to PKE. However, a generic construction achieving collusion-resistance (where the dictator can corrupt a sender to additionally obtain the sender double key) under only mild restrictions on the underlying PKE rema