C++ How to Program (10th Edition)
10th Edition
ISBN: 9780134448237
Author: Paul J. Deitel, Harvey Deitel
Publisher: PEARSON
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Chapter 21, Problem 21.28MAD
(SMS Language) Short Message Service (SMS) is a communications service that allows sending text messages of I60 or fewer characters between mobile phones. With the proliferation of mobile phone worldwide. SMS is being used in many developing nations political purposes (e.g., voicing opinions and opposition). reporting about natural disasters. and so on. For example, check out http://omunica.org/radio2.0/archives/87. Since the length of SMS messages is limited, SMS language—abbreviations of common words and phrases in mobile text messages, e-mails, instant messages, etc.-—is often used. For example, "in my opinion" is " IMO” in SMS Language. Research SMS Language online. Write a
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Entered
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Result
Message
correct
(923,998)
(923,998)
(2398,2171)
(2398, 2171)
correct
(2,808)
(2,808)
Your answer isn't a number
incorrect
(it looks like a list of numbers)
At least one of the answers above is NOT correct.
(1 point) Consider the elliptic curve group based on the equation
y²
= x + ax + b
x3
mod p
where a =
2440, b = 295, and p
=
3391.
We will use these values as the parameters for a session of Elliptic Curve Diffie-Hellman Key Exchange. We
will use P = (2, 808) as a subgroup generator.
You may want to use mathematical software to help with the computations, such as the Sage Cell Server
(SCS).
On the SCS you can construct this group as:
G=Elliptic Curve (GF(3391), [2440,295])
Here is a working example.
(Note that the output on SCS is in the form of homogeneous coordinates. If you do not care about the details
simply ignore the 3rd coordinate of output.)
Alice selects the private key 18 and Bob selects the private key 15.
What is A, the public key of Alice?…
C++ Language
Programming Language: use Python please
Chapter 21 Solutions
C++ How to Program (10th Edition)
Ch. 21 - Prob. 21.4ECh. 21 - Prob. 21.5ECh. 21 - (Find Code Error) Find any errors in the following...Ch. 21 - (Simple Encryption) Some information on the...Ch. 21 - Prob. 21.8ECh. 21 - Prob. 21.9ECh. 21 - (String Concatenation) Write a program that...Ch. 21 - (Hangman Game) Write a program that plays the game...Ch. 21 - (Printing a string Backward) Write a program that...Ch. 21 - (Alphabetizing Animal Names) Write a program that...
Ch. 21 - Prob. 21.14ECh. 21 - Prob. 21.15ECh. 21 - Prob. 21.16ECh. 21 - Prob. 21.17ECh. 21 - Prob. 21.18ECh. 21 - (Erasing Characters from a string) Write a program...Ch. 21 - Prob. 21.20ECh. 21 - Prob. 21.21ECh. 21 - Prob. 21.22ECh. 21 - Prob. 21.23ECh. 21 - Prob. 21.24ECh. 21 - Prob. 21.25ECh. 21 - (Cooking with Healthier Ingredients) Obesity in...Ch. 21 - Prob. 21.27MADCh. 21 - (SMS Language) Short Message Service (SMS) is a...
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- Introductory: The Caesar Cipher technique is one of the earliest and simplest methods of encryption techniques. It is simply a type of substitution cipher, i.e., each letter of a given text is replaced by a letter some fixed number of positions down the alphabet. For example, with a shift of 1, A would be replaced by B, B would become C, and so on. The method is apparently named after Julius Caesar, who apparently used it to communicate with his officials. Thus, to cipher a given text we need an integer value, known as a shift which indicates the number of positions each letter of the text has been moved down. The encryption can be represented using modular arithmetic by first transforming the letters into numbers, according to the scheme, A = 0, B = 1 ,…, Z = 25. Encryption of a letter by a shift n can be described mathematically as. En(x) = (x+n) mod 26 (Encryption Phase with shift n) Write an algorithm and implement a program in C to read the data from a file (called…arrow_forwardStrings) Exercise-Displaying Values Exercise: Displaying Values You may recall from an earlier playground an exercise that involved calculating the space remaining on an iPhone. You had the following information: The capacity of an iPhone is measured in gigabytes (GB). The iPhone in question has 8GB of storage. A gigabyte is about 1,000 megabytes (MB) The phone already has 3GB of stuff on it One minute of video takes 150MB of space Exercise Create a string that tells the user how many minutes of video they can store on the phone. You'll first need to perform the calculation steps, then use string interpolation to display the answer - which should look like this: You can record XXX more minutes of video. Hint: Do all of your calculations in megabytes. 17 18 19 20 21 22arrow_forwardComputer Networking Lab:arrow_forward
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Data Types; Author: CS50;https://www.youtube.com/watch?v=Fc9htmvVZ9U;License: Standard Youtube License