Part 1. (40 points) Please answer all 8 questions. Each question is 5 points. 1) What is total average number of operations (multiplications) using Square and Multiply Algorithm for 1024-bit integer? A) 1024 B) 512 C) 2048 D) 768 E) 1280 2) Which Algorithm or Test do we use for primality check? A) Euclidean Algorithm B) Extended Euclidian Algorithmm C) Miller-Rabins Test D) Fermat's Test E) (C) and (A) 3) Assume that a key length of 2DES is k bits. What is computational complexity of 2DES using Meet-in-the-Middle Attack A) number of encryption and decryptions-2 , number of storage locations 2k B) number of encryption and decryptions 22, number of storage locations 22 C) number of encryption and decryptions 2, number of storage locations 2 D) number of encryption and decryptions 2k2, number of storage locations 2 E) None of the above ) Which of the following is used to build stream cipher encryption scheme? A) ECB ) CBF CBC ) OFB ) None of the above