9. Which of the following, according to Kocher's 1996 paper, is not necessary to launch a successful timing attack? A way to precisely identify the start and completion of the operation The execution time variations on the operations are caused by different key values. The execution time variations on the operations are measureable. The algorithm used in the crypto-system and some design details All of the above are necessary. point 10. Which of the following statements about differential power analysis (DPA) is true? DPA needs only a small amount of power traces when the crypto algorithm is running. DPA requires accurate power traces. DPA needs to know the detailed implementation of the crypto algorithm under attack. DPA needs tools or skills to analyze the power traces. Both Kocher's and Schindler's timing attacks can break RSA algorithm. Which of the following statements is true? Kocher's timing attack targets the RSA decryption key. Both attacks try to factor n Schindler's timing attack targets the RSA decryption key. Both attacks target the RSA decryption key. point 12. The following actions can form a scan chain based attack on a system with 5 flip flops. What is the correct order to launch the attack? A. Set TC-0, let the system run for one clock cycle. B. set TC-1, read the output from scan out for 5 cycles. C. set TC-1, send state information to the system via scan in for 5 cycles. D. set TC-0, apply the input value at the system's primary input ports C,A,D,B A,B,C,D D,A,C,B C,D,A,B