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Continue to ChatIndistinguishability under adaptive chosen-ciphertext attack secure double-NTRU-based key encapsulation mechanism - https://avesis.omu.edu.tr/yayin/030b3f51-e6a8-45ff-8c1a-001dfce2f8f7/indistinguishability-under-adaptive-chosen-ciphertext-attack-secure-double-ntru-based-key-encapsulation-mechanism