C How to Program (8th Edition)
8th Edition
ISBN: 9780133976892
Author: Paul J. Deitel, Harvey Deitel
Publisher: PEARSON
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Chapter 5, Problem 5.42E
Program Plan Intro
To explain the functioning of the provided
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Compare the security services provided by a digital signature (DS) with those of a message authentication code (MAC). Assume that Oscar can observe all messages sent between Rina and Naseem. Oscar has no knowledge of any keys but the public one, in the case of DS. State whether DS and MAC protect against each attack and, if they do, how. The value auth(x) is computed with a DS or a MAC algorithm. In each scenario, assume the message M = x#####auth(x).
(Message integrity) Rina has the textual data x = “Transfer $1000 to Mark” to send to Naseem. To ensure the integrity of the data, Rina generates auth(x), forms a message M, and then sends M in cleartext to Naseem. Oscar intercepts the message and replaces “Mark” with “Oscar.” Will Naseem detect this in the case of either DS or MAC? If yes, how will Naseem detect it? If not, why?
(Replay) Rina has the textual data x = “Transfer $1000 to Mark” to send to Naseem. To ensure the integrity of the data, Rina generates auth(x), forms a message…
Chapter 5 Solutions
C How to Program (8th Edition)
Ch. 5 - Show the value of x after each of the following...Ch. 5 - (Parking Charges) A parking garage charges a $2.00...Ch. 5 - (Rounding Numbers) An application of function...Ch. 5 - (Rounding Numbers) Function floor may be used to...Ch. 5 - Write statements that assign random integers to...Ch. 5 - For each of the following sets of integers, write...Ch. 5 - (Hypotenuse Calculations) Define a function called...Ch. 5 - (Exponentiation) Write a function...Ch. 5 - Prob. 5.17ECh. 5 - Prob. 5.18E
Ch. 5 - Prob. 5.19ECh. 5 - (Displaying a Square of Any Character) Modify the...Ch. 5 - Prob. 5.21ECh. 5 - (Separating Digits) Write program segments that...Ch. 5 - (Time in Seconds) Write a function that takes the...Ch. 5 - (Temperature Conversions) Implement the following...Ch. 5 - (Find the Minimum) Write a function that returns...Ch. 5 - (Perfect Numbers) An integer number is said to be...Ch. 5 - Prob. 5.27ECh. 5 - (Reversing Digits) Write a function that takes an...Ch. 5 - (Greatest Common Divisor) The greatest common...Ch. 5 - (Quality Points for Students Grades) Write a...Ch. 5 - (Coin Tossing) Write a program that simulates coin...Ch. 5 - (Guess the Number) Write a C program that plays...Ch. 5 - (Guess the Number Modification) Modify the program...Ch. 5 - (Recursive Exponentiation) Write a recursive...Ch. 5 - (Fibonacci) The Fibonacci series 0, 1, 1, 2, 3, 5,...Ch. 5 - (Towers of Hanoi) Every budding computer scientist...Ch. 5 - Prob. 5.37ECh. 5 - Prob. 5.38ECh. 5 - Prob. 5.39ECh. 5 - Prob. 5.40ECh. 5 - (Distance Between Points) Write a function...Ch. 5 - Prob. 5.42ECh. 5 - Prob. 5.43ECh. 5 - After you determine what the program of Exercise...Ch. 5 - (Testing Math Library Functions) Write a program...Ch. 5 - Find the error in each of the following program...Ch. 5 - Prob. 5.47ECh. 5 - (Research Project: 1m proving the Recursive...Ch. 5 - (Global Warming Facts Quiz) The controversial...Ch. 5 - Prob. 5.50MDCh. 5 - Prob. 5.51MDCh. 5 - (Computer-Assisted Instruction: Monitoring Student...Ch. 5 - (Computer-Assisted Instruction: Difficulty Levels)...Ch. 5 - (Computer-Assisted Instruction: Varying the Types...
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