1. Alice and Bob are using ElGamal cryptosystem Alice chooses [p,A,g] = [107,A,2] and a private key a=67. Bob chooses a random integer wants to send the letter B=66 to Alice, he chooses b=45. (i) what does Bob send to Alice? (ii) Show how Alice decrypt the encrypted message?

2. Alice is using ElGamal crypto. p=43 and g=12 Alice private key a= 11 and A=26. Bob has sent Alice the following ciphertext C1=40, C2=20. Show how does Alice decrypt this message.

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