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

What is race condition, What is Race condition? Race condition: The c...

What is Race condition? Race condition: The circumstances where several processes access - and manipulate shared data-concurrently. The last value of the shared data depends

What do you mean by digital computer, COMPUTER ORGANIZATION & ARCHITECTURE ...

COMPUTER ORGANIZATION & ARCHITECTURE 1. What do you mean by digital computer? Explain the block diagram of a digital computer. 2. What do you mean by Difference Engine? Expl

What are the data types of the external layer, What are the Data types of t...

What are the Data types of the external layer? The Data types of the external layer are :- ACCP, Char, CLNT, CUKY, CURR, DATS, DESC, FLTP, INT1, INT2, INT4, LANG, LCHR, L

Difference between digital zoom and optical zoom, Question: (a) What ar...

Question: (a) What are effect presets and how can they be helpful? (b) Explain the difference between digital zoom and optical zoom. (c) Explain exposure in the context o

Differences between asp and asp .net, What are the differences between ASP ...

What are the differences between ASP and ASP .Net ?    1. ASP: Code is Interpreted ASP.NET: Code is Compiled 2. ASP: Business Logic and Presentation Logic are in a one

Determine the equivalent in octal of decimal number, Convert decimal 153 to...

Convert decimal 153 to octal. Equivalent in octal will be ? Ans. (153) 10 = (231) 8

Explain the program translation model, Explain the program translation mode...

Explain the program translation model The program translation model makes the execution gap through translating a program written in a programming language, termed as the sou

Limitation of software engineering, i want to get answer about this topic w...

i want to get answer about this topic what is software engineering and what is its limitation

Find the minimum sop and pos expression, Find the minimum SOP and POS expre...

Find the minimum SOP and POS expression for the following functions using Karnaugh Map and realize the expression using appropriate gates. Also realize SOP form using NAND-to-NAND

What is meant by hotspots, What is meant by hotspots? A Hotspot is a l...

What is meant by hotspots? A Hotspot is a list area where the mouse pointer appears as an upright hand symbol. When a user points to that area (and the hand cursor is active),

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