Question: 10.1 Users A and B use the Diffie-Hellman key exchange technique with a common prime q = 71 and a primitive root ?-7. a. If

10.1 Users A and B use the Diffie-Hellman key exchange technique

10.1 Users A and B use the Diffie-Hellman key exchange technique with a common prime q = 71 and a primitive root ?-7. a. If user A has private key XA 5, what is A's public key YA? b. If user B has private key XB 12, what is B's public key YB? c. What is the shared secret key? 10.6 Consider an Elgamal scheme with a common prime q-71 and a primitive root a- 7. a. If B has public key YB 3 and A choose the random integer k-2, what is the ciphertext of M-30? 11.9 State the value of the padding field in SHA-512 if the length of the message is a. 1919 bits 11.10 State the value of the length field in SHA-512 if the length of the message is b. 1920 bits

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