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

Define about anchor tag, Q. Define about Anchor Tag? Anchor tag is used...

Q. Define about Anchor Tag? Anchor tag is used to create links between various objects such as HTML pages, web sites, files etc. It is introduced by characters and termi

Data structure, Sort the following list using selection sort technique, dis...

Sort the following list using selection sort technique, displaying each step. 20,12,25,6,10,15,13

Determine the 2's complement subtraction, Perform 2's complement subtractio...

Perform 2's complement subtraction of (7) 10 - (11) 10 . Ans. 2's Complements Subtraction of (7) 10 - (11) 10 Firstly convert the decimal numbers 7 and 11 to there binary e

Information systems development methodologies, Task 1:   Methodologies a...

Task 1:   Methodologies are 'regarded as a recommended series of steps and procedures to be followed in the course of developing an information system' and were introduced to im

Computational fluid dynamics, Q. Computational Fluid Dynamics? Computat...

Q. Computational Fluid Dynamics? Computational Fluid Dynamics: CFD was a FORTRAN like language developed in the early 70s at "Computational Fluid Dynamics Branch of Ames Resear

Database management system, what would be the occupancy of each leaf node o...

what would be the occupancy of each leaf node of a B+ tree

States the term ip addresses, States the term IP addresses? IP address ...

States the term IP addresses? IP address considers to the name of a computer onto a network, as the Internet. a. An Identifier for a device or computer onto a TCP/IP network

Where shared resources are accessed, A critical section is a program segmen...

A critical section is a program segment? Ans. A critical section is a program segment where shared resources are accessed.

How debugger works internally, Whenever we compile with -g option, it will ...

Whenever we compile with -g option, it will make a symbol table, and according that table for every function and line it will call ptrace.

First-order models -artificial intelligence, First-Order Models - Artificia...

First-Order Models - Artificial intelligence: We proposed first-order logic like good knowledge representation language rather than propositional logic because it is more expre

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