In this problem we explore the relationship between password length and cryptographic security.Suppose a password consists of 6 ASCII characters. You can review the ASCII characters here.. There are exactly 2'= 128 ASCIIcharacters; 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 assumethat the user used only 28 characters from the keyboard. What is the key length in bits in this case?How manydays, in the worst case, would it take to break this weaker password? You can't round to the nearest day herebe as exact as possible.Supposing you used only 28 characters, how long is the shortest password that achieves 248 bits of security?

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Suppose a password consists of 6 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).

Suppose a password consists of 6 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).

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...

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Question

In this problem we explore the relationship between password length and cryptographic security.
Suppose a password consists of 6 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 28 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 28 characters, how long is the shortest password that achieves 248 bits of security?

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