Assume El Gamal encryption, where the group being used is…
Assume El Gamal encryption, where the group being used is Z47∗ with generator 5. (This group has order 46, which is not prime. But El Gamal encryption can be defined in any cyclic group.) Assume the public key contains h=10. Say an attacker sees a ciphertext (41, 18) that is the encryption of some unknown message m. Which of the following is an encryption of [5m mod 47]?
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