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

Differentiate b/w wml-script & web-based scripting language, Differentiate ...

Differentiate between WML-Script and Web-based scripting languages. WML Script is a lightweight procedural scripting language, optimized for small-memory, low-power CPU wireles

Write a program to perform multiplication of two numbers, Q. Write a progr...

Q. Write a program to perform multiplication of two numbers in specified radix. Check that entered numbers are in specified radix or not else error message should be displayed.

what is code for adding two integers in java?, import java.util.Scanner;  ...

import java.util.Scanner;   class AddNumbers {    public static void main(String args[])    {       int x, y, z;       System.out.println("Enter two integers to calculate their sum

Explain about of unicode, Q. Explain about of Unicode? This is a newer ...

Q. Explain about of Unicode? This is a newer International standard for character representation. Unicode offers a unique code for each character irrespective of Program, platf

Calculate number of calls put through by a single server, A group of 20 ser...

A group of 20 servers carry traffic of 10 erlangs. If the average duration of a call is three minutes, calculate the number of calls put through by a single server and the group as

What is deadlock in operating system, Explain Deadlock in operating system ...

Explain Deadlock in operating system ? Deadlock: all process in a set of processes is waiting for an event which only a process in the set can cause.

Determine sky wave communication is prone to fading or not, Sky wave Commun...

Sky wave Communication is prone to fading, it is true or false. Ans: It is true that sky wave Communication is prone to fading.

QUELING SYTEM , SHOW THAT AVERAGE NUMBER OF UNIT IN A (M/M/1) QUELING SYTEM...

SHOW THAT AVERAGE NUMBER OF UNIT IN A (M/M/1) QUELING SYTEM IS EQUAL TO P/(1-p). NOTE:P=ROW

Enumerate about the trackball device, Enumerate about the trackball A t...

Enumerate about the trackball A trackball is a two-dimensional positioning device, a spaceball provides six degrees of freedom. Unlike the trackball, a spaceball does not actua

Cryptography, Basically I need implement program using LC3 assembly languag...

Basically I need implement program using LC3 assembly language where I can type any message using ASCII code (this will my input). Then read the output in cipher text. It has to be

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