12 points QUESTION 6 1. When using symmetric encryption it is very important to keep the algorithm secret. True False 2 points QUESTION 7 1. The takes the ciphertext and the secret key and produces the original plaintext. It is essentially the encryption algorithm run in reverse. O A. Voronoi algorithm B. diagram algorithm OC.cryptanalysis O D. decryption algorithm 2 points QUESTION 8 1. DES exhibits the classic block cipher structure, which consists of a number of identical rounds of processing. A. Feistel B. SAC OC. Shannon OD. Rendell 2 points QUESTION 9 1. The strict avalanche criterion and the bit independence criterion appear to weaken the effectiveness of the confusion function. True False 2 points QUESTION 10 1. With the use of symmetric encryption, the principal security problem is maintaining the secrecy of the key. True False