security, Computer Engineering

Assignment Help:
We now consider the relation between passwords and key size. For this purpose
consider a cryptosystem where the user enters a key in the form of a password.
Assume a password consisting of 8 letters, where each letter is encoded by the
ASCII scheme (7 bits per character, i.e., 128 possible characters). What is the
size of the key space which can be constructed by such passwords?
What is the corresponding key length in bits?
Assume that most users use only the 26 lowercase letters from the alphabet in-
stead of the full 7 bits of the ASCII-encoding. What is the corresponding key
length in bits in this case?
At least how many characters are required for a password in order to generate a
ey length of 128 bits in case of letters consisting of
a. 7-bit characters?
b. 26 lowercase letters from the alphabet?

Related Discussions:- security

Invariant of the class, What are the conditions that have to be met for a c...

What are the conditions that have to be met for a condition to be an invariant of the class? Ans) ? The condition should hold at the end of each constructor. ? The conditi

Develop a regular expression for real number and identifier, Develop a regu...

Develop a regular expression for Real number with optional fraction and Identifier. (i) A regular expression for real number with optional fraction is [+ | -] (d) +. (d)* (i

Desirable choice for the partitioning element in quick sort, A desirable ch...

A desirable choice for the partitioning element in quick sort is First element of the list.

Security, We now consider the relation between passwords and key size. For ...

We now consider the relation between passwords and key size. For this purpose consider a cryptosystem where the user enters a key in the form of a password. Assume a password consi

What is a verification point?, A verification point is a point in a script ...

A verification point is a point in a script that you make to confirm the state of an object across builds of the application-under-test.

Fundamental building block of main memory, Q. Fundamental building block of...

Q. Fundamental building block of main memory? The fundamental building block of main memory remains DRAM chip as it has for decades. Till recently there had been no important c

What are different edi components and edi services, What are different EDI ...

What are different EDI components and EDI services? Different EDI components and EDI services are illustrated as: Three main components including services in EDI System are

Explain the process of inter-register signalling, Explain the process of in...

Explain the process of inter-register signalling. Registers are utilized in common control exchanges to store and analyze routing data. They are given on a common basis is a

Illustrate characteristic tables of flip-flops, Q. Illustrate Characteristi...

Q. Illustrate Characteristic tables of flip-flops? Excitation Tables Characteristic tables of flip-flops present the subsequent state when inputs and present state are kno

What can digital circuits do?, Circuits can be designed to implement a spec...

Circuits can be designed to implement a specifictaske.g. a simple circuit could compare two inputvoltages and give a high output if they matched anda low output if they did not mat

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd