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

Explain programmer visible registers, Q. Explain Programmer Visible Registe...

Q. Explain Programmer Visible Registers? These registers can be accessed employing machine language. In general we encounter four kinds of programmer visible registers.

Explain how presentation layer helps in establishing, Explain how presentat...

Explain how presentation layer helps in establishing and processing data in End to End layers. The idea of the presentation layer is to stand for information to the communicati

Define miss rate, Define miss rate? It is the number of misses' states ...

Define miss rate? It is the number of misses' states as a fraction of attempted accesses.

Receive a message, Receive a message. tid is integer task identifier of tra...

Receive a message. tid is integer task identifier of transmitting process supplied by user and msgtag is message tag supplied by user( must be non negative integer). The process re

What is ai backgammon, This part looks at Berliner's program, two backprop ...

This part looks at Berliner's program, two backprop versions by Tesauro and a temporal difference process by Tesauro. This latter program is VERY good quality and has found strateg

Software engineering, how many errors will be left after defect amplificat...

how many errors will be left after defect amplification and removal method on the following data design=40 analysis=30 maintenance=20 testing 35 coding 25 take 75% removal efficie

What is rom, What is ROM? Read only memory [ROM] is used for storing pr...

What is ROM? Read only memory [ROM] is used for storing programs that are permanently resident in the computer and for tables of constants that do not change in value as the pr

Advantages and disadvantages of e-commerce, E-commerce is one of the most s...

E-commerce is one of the most significant aspects of the internet. Having emerged recently and growing at a steady state, it becomes essential to look at the advantages and disadva

Java program , Q.--> The program simulates a student management system havi...

Q.--> The program simulates a student management system having thE following:The interface uses command buttons to (i) add,edit,delete,update and cancel the records, (ii) to naviga

Algorithm to insert a key in b-tree, Algorithm to insert a key in B-tree is...

Algorithm to insert a key in B-tree is as follows: 1.  First search is completed for the place where the new record must be put. As the keys are inserted, they are sorted into

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