Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Computer Engineering Expert

problem 1)A) Assume you are taking a multiple-choice test comprising 30 problems, each of which has 5 choices (A,B,C,D,E). How many different ways are there to complete test, if you are required to answer every problem? How many various ways are there to complete test if you leave at least one problem blank?

B) Assume you are trying to improve password system for the University of Memphis. At the moment, passwords have the following restrictions (not really, but just for the purposes of this exercise):

a) Should be 8-12 characters long (inclusive)

b) Uppercase letters, lowercase letters, and digits are allowed

c) Should contain exactly one uppercase letter

d) Should contain exactly one digit

You devise a new set of password constraints, as follows:

a) Should be exactly 9 characters

b) Uppercase letters, lowercase letters, digits, underscores, and hyphens are allowed

c) Should contain at least one uppercase letter

d) Should contain at least one digit

e) Should contain exactly one special character (underscore or hyphen)

Which password scheme is more secure against brute-force attacks? In your opinion, which one is better for end-users and why?

Computer Engineering, Engineering

  • Category:- Computer Engineering
  • Reference No.:- M94617

Have any Question? 


Related Questions in Computer Engineering

1 ticketsrus needs an application to calculate ticket

1. TicketsRUs needs an application to calculate ticket prices. There are three ticket prices: • Orchestra $85 each • Mezzanine $70 each • Balcony $45 each There is also a 15% discount on matinee performances. Your applic ...

Course takeaway please respond to the followingfrom the

"Course Takeaway" Please respond to the following: From the lessons and conceptual ideas presented in this course, determine the single most impactful or interesting lesson / concept you have learned. Provide a rationale ...

As the example of copacobana 105 shows key-search machines

As the example of COPACOBANA [105] shows, key-search machines need not be prohibitive from a monetary point of view. We now consider a simple bruteforce attack on DES which runs on COPACOBANA. 1. Compute the runtime of a ...

Implement a combination lock class a combination lock has a

Implement a combination lock class. A combination lock has a dial with 26 positions labeled A . . . Z. The dial needs to be set three times. If it is set to the correct combination, the lock can be opened. When the lock ...

Create an array of 1000 integers sorted in numerical order

Create an array of 1,000 integers sorted in numerical order. Write a program that runs each sorting algorithm with this array, timing each algorithm, and compare the times. Compare these times to the times for sorting a ...

Overviewyou are a mobile application developer working for

Overview: You are a mobile application developer working for Mick Jagger who owns Wild Horses Incorporated (WHI).  Mick's company is just getting started with Android mobile application development. Mick wants to make su ...

Consider the signalxn deltan-2deltan-1 2deltan-2-deltan-3a

Consider the signal x[n] = δ[n]-2δ[n-1]+ 2δ[n-2]-δ[n-3]. (a) Compute and plot the 4-point DFT X[k]. (b) Using the fewest number of zeros possible, zero pad x[n] so that the DFT frequency resolution is at least Ω0 = 0.1. ...

1 describe the scenario where none of philosophers ever

1. Describe the scenario where none of philosophers ever eats (i.e., starvation). What is the sequence of events that happen that lead up to this problem? 2. Describe how we can solve this problem by introducing the conc ...

1 what is physical security what are the primary threats to

1. What is physical security? What are the primary threats to physical security? How are they made manifest in attacks against the organization? 2. What are the roles of IT, security, and general management with regard t ...

Design a help-desk priority manager store help requests

Design a help-desk priority manager. Store help requests stored in a text file with the following structure: priority, id of requesting party, time of request The priority is an integer in the range 1-5 with 1 being the ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

WalMart Identification of theory and critical discussion

Drawing on the prescribed text and/or relevant academic literature, produce a paper which discusses the nature of group

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro