1. A website requires a password that is 10 characters long and that contains at least 1 lower letter, 1 upper letter, 2 digits from the set (2, 5, 6), and 2 special letters from the set (1,@, #,$, %). The repetition of letters or digits or special characters is allowed. An example password is Aa6Bc#de2% where note that there are two digits and two special characters. (a) What is the total number of different passwords? Explain how you derive this number. (b) If each of these passwords takes 1 millisecond to try in a brutal-force attack, how many hours are needed to complete trying all of the possible passwords?
1. A website requires a password that is 10 characters long and that contains at least 1 lower letter, 1 upper letter, 2 digits from the set (2, 5, 6), and 2 special letters from the set (1,@, #,$, %). The repetition of letters or digits or special characters is allowed. An example password is Aa6Bc#de2% where note that there are two digits and two special characters. (a) What is the total number of different passwords? Explain how you derive this number. (b) If each of these passwords takes 1 millisecond to try in a brutal-force attack, how many hours are needed to complete trying all of the possible passwords?
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
Related questions
Question
![1. A website requires a password that is 10 characters long and that contains at least 1
lower letter, 1 upper letter, 2 digits from the set (2, 5, 6), and 2 special letters from
the set (1,@, #, $, %). The repetition of letters or digits or special characters is
allowed. An example password is Aa6Bc#de2% where note that there are two
digits and two special characters.
(a) What is the total number of different passwords? Explain how you derive this
number.
(b) If each of these passwords takes 1 millisecond to try in a brutal-force attack, how
many hours are needed to complete trying all of the possible passwords?](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2F779a9143-aa96-43cd-bf7f-a37f1c215372%2F1e538221-1385-46be-b95b-2328b9bf999c%2Fevgn7fj_processed.jpeg&w=3840&q=75)
Transcribed Image Text:1. A website requires a password that is 10 characters long and that contains at least 1
lower letter, 1 upper letter, 2 digits from the set (2, 5, 6), and 2 special letters from
the set (1,@, #, $, %). The repetition of letters or digits or special characters is
allowed. An example password is Aa6Bc#de2% where note that there are two
digits and two special characters.
(a) What is the total number of different passwords? Explain how you derive this
number.
(b) If each of these passwords takes 1 millisecond to try in a brutal-force attack, how
many hours are needed to complete trying all of the possible passwords?
Expert Solution
![](/static/compass_v2/shared-icons/check-mark.png)
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
Step by step
Solved in 2 steps with 1 images
![Blurred answer](/static/compass_v2/solution-images/blurred-answer.jpg)
Recommended textbooks for you
![Computer Networking: A Top-Down Approach (7th Edi…](https://www.bartleby.com/isbn_cover_images/9780133594140/9780133594140_smallCoverImage.gif)
Computer Networking: A Top-Down Approach (7th Edi…
Computer Engineering
ISBN:
9780133594140
Author:
James Kurose, Keith Ross
Publisher:
PEARSON
![Computer Organization and Design MIPS Edition, Fi…](https://www.bartleby.com/isbn_cover_images/9780124077263/9780124077263_smallCoverImage.gif)
Computer Organization and Design MIPS Edition, Fi…
Computer Engineering
ISBN:
9780124077263
Author:
David A. Patterson, John L. Hennessy
Publisher:
Elsevier Science
![Network+ Guide to Networks (MindTap Course List)](https://www.bartleby.com/isbn_cover_images/9781337569330/9781337569330_smallCoverImage.gif)
Network+ Guide to Networks (MindTap Course List)
Computer Engineering
ISBN:
9781337569330
Author:
Jill West, Tamara Dean, Jean Andrews
Publisher:
Cengage Learning
![Computer Networking: A Top-Down Approach (7th Edi…](https://www.bartleby.com/isbn_cover_images/9780133594140/9780133594140_smallCoverImage.gif)
Computer Networking: A Top-Down Approach (7th Edi…
Computer Engineering
ISBN:
9780133594140
Author:
James Kurose, Keith Ross
Publisher:
PEARSON
![Computer Organization and Design MIPS Edition, Fi…](https://www.bartleby.com/isbn_cover_images/9780124077263/9780124077263_smallCoverImage.gif)
Computer Organization and Design MIPS Edition, Fi…
Computer Engineering
ISBN:
9780124077263
Author:
David A. Patterson, John L. Hennessy
Publisher:
Elsevier Science
![Network+ Guide to Networks (MindTap Course List)](https://www.bartleby.com/isbn_cover_images/9781337569330/9781337569330_smallCoverImage.gif)
Network+ Guide to Networks (MindTap Course List)
Computer Engineering
ISBN:
9781337569330
Author:
Jill West, Tamara Dean, Jean Andrews
Publisher:
Cengage Learning
![Concepts of Database Management](https://www.bartleby.com/isbn_cover_images/9781337093422/9781337093422_smallCoverImage.gif)
Concepts of Database Management
Computer Engineering
ISBN:
9781337093422
Author:
Joy L. Starks, Philip J. Pratt, Mary Z. Last
Publisher:
Cengage Learning
![Prelude to Programming](https://www.bartleby.com/isbn_cover_images/9780133750423/9780133750423_smallCoverImage.jpg)
Prelude to Programming
Computer Engineering
ISBN:
9780133750423
Author:
VENIT, Stewart
Publisher:
Pearson Education
![Sc Business Data Communications and Networking, T…](https://www.bartleby.com/isbn_cover_images/9781119368830/9781119368830_smallCoverImage.gif)
Sc Business Data Communications and Networking, T…
Computer Engineering
ISBN:
9781119368830
Author:
FITZGERALD
Publisher:
WILEY