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Problem 2 (6/20) Consider the Elgamal signature scheme: You are given Bobs private key Kp (d) (67) and the corresponding public key Kpub (p, a, 3)-(97, 23, ) 1. Calculate the Elgamal signature (rs) and the corresponding verification for a message from Bob to Alice with the following messages x and ephemeral keys kg: r 90,E17 2. Two messages z1, z2 are recei ived with their corresponding signatures (r, si) from Bob. Verify whether the messages (1, t, s) (19,68, 55) and (x,r2, 2) (82, 13,65) both origi- nate from Bob