Explore BrainMass
Share

Geometric Distribution - Password Hacker

This content was STOLEN from BrainMass.com - View the original, and get the already-completed solution here!

A computer system uses passwords constructed from the 26 letters (a to z) or 10 integers (0 to 9). Suppose there are 10000 users on the system with unique passwords. A hacker randomly selects (with replacement) passwords from the potential set.

A) There are 9900 users with unique 6 character passwords on the system and the hacker randomly selects 6 character passwords. What is the mean and standard deviation of the number of attempts before the hacker selects a user password?

B) Suppose there are 100 users with unique 3 character passwords on the system and the hacker randomly selects 3 character passwords. What is the mean and standard deviation of the number of attempts before the hacker selects a user password?

C) Which system is more secure the 6 character or the 3 character password protected system?

© BrainMass Inc. brainmass.com October 16, 2018, 9:26 pm ad1c9bdddf
https://brainmass.com/math/basic-algebra/geometric-distribution-password-hacker-184441

Solution Preview

The solution file is attached.

Note: I have taken the sentence "A computer system ...

Solution Summary

The expert examines the geometric distribution for the password hackers. Neat and Step-by-step solutions for all the questions.

$2.19