1. (60%) Assume an 8-letter password from the 95 printable ASCII characters is used in a computer system. a. If passwords are chosen by the users, what is the total password population? What is the probability of an adversary guessing a password correctly? b. If passwords are generated automatically by a pseudorandom number generator, what is the total password population? What is the probability of an adversary guessing a password correctly?

Step-by-step explanation:

a. There are 8 characters in the password, and 95 possibilities for each character.  The number of possible combinations is:

95⁸

b. The probability of a password being guessed correctly is:

1 / 95⁸

c. If a number generator is used, there are 10 possibilities for each character.  The number of possible combinations is:

10⁸

d. The probability of a password being guessed correctly is:

1 / 10⁸

theres no picture: /

step-by-step explanation:

step-by-step explanation:

given that ab is divided into equal parts as

ac, cd, de, ef, fg, gh, hi, ib.

from this we find that f is the midpoint of ab.

so using mid point formula we find

f = (3,7)

similarly considering fb, we get

h = mid point of fb = ((6,6) and g, mid point of fh is

g = (9/2, 13/2)

i is mid point of hb

so i =(15/2,11/2)