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4. El-Gamal (2-3-3) Consider the El-Gamal encryption scheme and let p = 19 and g=3 (a) Suppose the private key is x = 7. Compute

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4. El-Gamal (2-3-3) Consider the El-Gamal encryption scheme and let p = 19 and g=3 (a) Suppose the private key is x = 7. Compute the public key y. (b) Encrypt the message M 8 using the public key above and r = 8. (c) Verify your calculation in part (b) above by decrypting the ciphertext you obtained in part (b)

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