Assume: - A password is 6 characters in length, and there 13 different characters from which we can select. - The password file includes 64 passwords, an attacker has a dictionary of 128000 common passwords, and the probability of having a password from password file in the dictionary is 0.2. - Assume two salt values are included for each user in the password file. - Work is defined as number of computed hashes. - Work time = 3xWork seconds. Example: Work = 10 hashes, then Work time =3x10 = 30 seconds. What is the expected number of hours needed to find the password for a specific user if two salts are used and dictionary is not used? O 21767823.360 Answer not given 8044.682 5441955.840 O 4022.341 O 2011.170