Digital signatures have a potential weakness due to lazy users. In e-commercetransactions, a contract might be drawn up and the user asked to sign its SHA-1 hash.If the user does not actually verify that the contract and hash correspond, the user mayinadvertently sign a different contract. Suppose that the Mafia try to exploit thisweakness to make some money. They set up a pay Web site (e.g., pornography,gambling, etc.) and ask new customers for a credit card number. Then they send over acontract saying that the customer wishes to use their service and pay by credit cardand ask the customer to sign it, knowing that most of them will just sign withoutverifying that the contract and hash agree. Show how the Mafia can buy diamonds froma legitimate Internet jeweler and charge them to unsuspecting customers.

digital Signatures: To provide authenticity for a report or a virtual message, a unique…

Answered: Digital signatures have a potential…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Tyler and his cousin are playing a game where they pick up colored sticks. Tyler currently has 32 points and likes to pick up the red sticks, earning 8 points every turn. His cousin just lost all her points on the previous turn, and has a strategy to catch up by getting all the teal ones, earning 9 points per turn. In a certain number of turns, the score will be tied. How long will that take? How many points will they each have? In __ turns, both players will have __ points.
Phoenix is a hub for a large airline. Suppose that on a particular day, 8,000 passengers arrived in Phoenix on this airline. Phoenix was the final destination for 1,600 of these passengers. The others were all connecting to flights to other cities. On this particular day, several inbound flights were late, and 410 connecting passengers missed their connecting flight and were delayed in Phoenix. Of the 410 who were delayed, 85 were delayed overnight and had to spend the night in Phoenix. Consider the chance experiment of choosing a passenger at random from these 8,000 passengers. Calculate the following probabilities. (Round your answers to three decimal places.) (a) Calculate the probability that the selected passenger had Phoenix as a final destination. (b) Calculate the probability that the selected passenger did not have Phoenix as a final destination. (c) Calculate the probability that the selected passenger was connecting and missed the connecting flight. (d) Calculate the…
Scenario: 200 people were asked, “Who is your favorite superhero?” Below are the data. Test the null hypothesis that the population frequencies for each category are equal. α= .05. Iron Man Black Panther Wonder Woman Spiderman fo = 40 fo = 60 fo =55 fo = 45 fe = fe = fe = fe = What is the correct result based on the data?
Suppose that you work for Devin’s private consulting company, Menger Education LLC. The company hosts classes training high school students in Microsoft office products in preparation for the Microsoft certifications they put out. Each student pays $500 for the 2-month course, and Devin offers a guarantee that if the student doesn’t pass the certification test, then he will refund the class and pay the student back the $100 test fee (this fee was paid to Microsoft, NOT Austin, so if the student passes then they are assumed to have paid their own fee). Devin advertises that 91% of his students pass the exam. a) Let the random variable Y be Menger Education’s gain per student. What is the expectation with regard to company profit (gain) for the certification class, per student? b) Suppose that in 2 years, more and more students start to sign up for the certification classes. So, the passing rate for certifications will naturally decrease, say to .87. Naturally, this will have to be…
A social security number has 3 digits, then 2 digits, then 4 digits. If the first 3 digits can’t be 0, the second 2 digits can’t be 1 or 5, and the last 4 digits can be anything, how many possible cards can be made?
A producer of educational TV shows for gifted children wants to promote the claim that gifted children's scores on an analytical test increase the more the children watch their shows. In RStudio, run the following code to install and/or library the package "openintro". 1. Install.packages("openintro") # don't do this again if you already did this! 2. library(openintro) 3. gifted Delete the install line of code if you are in an RMD file so that it doesn't install every time you knit. The last line of code will access the dataset of that name. dataset named gifted gives information about test scores of gifted children on a standard analytical The test and the number of hours of educational TV these children watch. use the data set to make a model to predict score on analytical skills test (score") from hours of educational TV watched per week (edutv"). a. Make a scatterplot of "score" (y-axis) vs "edutv" (x-axis). Which plot is the scatterplot? Graph A Graph B Graph C Graph Do ỏ A 1954…
According to Wikipedia, Marie Skłodowska Curie (7 November 1867 - 4 July 1934) was a Polish and naturalized-French physicist and chemist who conducted pioneering research on radioactivity. She was the first woman to win a Nobel Prize, the first person and the only woman to win the Nobel Prize twice, and the only person to win the Nobel Prize in two different scientific fields. She was part of the Curie family legacy of five Nobel Prizes. She was also the first woman to become a professor at the University of Paris, and in 1995 became the first woman to be entombed on her own merits in the Panthéon in Paris. Madame Curie died 1934 from aplastic anaemia, a rare condition linked to high levels of exposure to the radioactive elements polonium and radium. Due to her many years of exposure to these radioactive. elements, her remains are dangerously radioactive and are entombed in a lead-lined coffin in France's Panthéon. The thick lead shields visitors to the Panthéon from the dangerous…
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