Encryption

1. A phonetic password generator picks two segments randomly for each six letter password. The form of each segment is C9V (consonant, digit, vowel), where = 6a, e, i, o, u7 and C ≠ V.

a. What is the total password population?

b. What is the probability of an adversary guessing a password correctly?

2. Assume that passwords are limited to the use of the 95 printable ASCII characters and that all passwords are 8 characters in length. Assume a password cracker with an encryption rate of 6.4 million encryptions per second. How long will it take to test exhaustively all possible passwords on a UNIX system?