In this problem we explore the relationship between password length and cryptographic security. Suppose a password consists of 7 ASCII characters. You can review the ASCII characters here.. There are exactly 27 : = 128 ASCII characters; we will assume every character in the password is ASCII (non-printing characters are allowed). What is the size of the keyspace that consists of passwords of this form? What is the equivalent key length in bits? Assuming that you could check one password every 10-7 seconds, what is the worst case running time for cracking this password by brute force search (in days)? Now assume that the user used only 33 characters from the keyboard. What is the key length in bits in this case? How many days, in the worst case, would it take to break this weaker password? You can't round to the nearest day here -- be as exact as possible. Supposing you used only 33 characters, how long is the shortest password that achieves 125 bits of security?

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
icon
Related questions
Question
In this problem we explore the relationship between password length and cryptographic security.
Suppose a password consists of 7 ASCII characters. You can review the ASCII characters here.. There are exactly
2' = 128 ASCII characters; we will assume every character in the password is ASCII (non-printing characters are
allowed).
What is the size of the keyspace that consists of passwords of this form?
What is the equivalent key length in bits?
Assuming that you could check one password
every 10-' seconds, what is the worst case running time for cracking this password by brute force search (in days)?
Now assume that the user used only 33 characters from the keyboard. What is the key
length in bits in this case?
How many days, in the worst case, would it take to break this
weaker password? You can't round to the nearest day here -- be as exact as possible.
Supposing you used only 33 characters, how long is the shortest password that achieves 125 bits of security?
Transcribed Image Text:In this problem we explore the relationship between password length and cryptographic security. Suppose a password consists of 7 ASCII characters. You can review the ASCII characters here.. There are exactly 2' = 128 ASCII characters; we will assume every character in the password is ASCII (non-printing characters are allowed). What is the size of the keyspace that consists of passwords of this form? What is the equivalent key length in bits? Assuming that you could check one password every 10-' seconds, what is the worst case running time for cracking this password by brute force search (in days)? Now assume that the user used only 33 characters from the keyboard. What is the key length in bits in this case? How many days, in the worst case, would it take to break this weaker password? You can't round to the nearest day here -- be as exact as possible. Supposing you used only 33 characters, how long is the shortest password that achieves 125 bits of security?
Expert Solution
trending now

Trending now

This is a popular solution!

steps

Step by step

Solved in 2 steps with 2 images

Blurred answer
Similar questions
  • SEE MORE QUESTIONS
Recommended textbooks for you
Database System Concepts
Database System Concepts
Computer Science
ISBN:
9780078022159
Author:
Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:
McGraw-Hill Education
Starting Out with Python (4th Edition)
Starting Out with Python (4th Edition)
Computer Science
ISBN:
9780134444321
Author:
Tony Gaddis
Publisher:
PEARSON
Digital Fundamentals (11th Edition)
Digital Fundamentals (11th Edition)
Computer Science
ISBN:
9780132737968
Author:
Thomas L. Floyd
Publisher:
PEARSON
C How to Program (8th Edition)
C How to Program (8th Edition)
Computer Science
ISBN:
9780133976892
Author:
Paul J. Deitel, Harvey Deitel
Publisher:
PEARSON
Database Systems: Design, Implementation, & Manag…
Database Systems: Design, Implementation, & Manag…
Computer Science
ISBN:
9781337627900
Author:
Carlos Coronel, Steven Morris
Publisher:
Cengage Learning
Programmable Logic Controllers
Programmable Logic Controllers
Computer Science
ISBN:
9780073373843
Author:
Frank D. Petruzella
Publisher:
McGraw-Hill Education