Program Plan: List of variables: name: stores the name of the person. birthdate: stores the date of birth entered by user. worknum: stores the work phone number. cellnum: stores the cell phone number. List of functions used: Write(): To display instructions in string to user. Convert.ToInt32(): To convert the entered string into integer. ReadLine(): To read input from user in string format. Summary Introduction: Program will use Main () method to prompt the user to enter values for name, birthdate, working phone number and cell phone number. These values are then printed using console.WriteLine(). Program Description: Purpose of program is to enter values from user and display name, birthdate, work phone number and cell phone number in output.

Question

We are considering the RSA encryption scheme. The involved numbers are small, so the communication is insecure. Alice's public key (n,public_key) is (247,7). A code breaker manages to factories 247 = 13 x 19 Determine Alice's secret key. To solve the problem, you need not use the extended Euclid algorithm, but you may assume that her private key is one of the following numbers 31,35,55,59,77,89.

Answer 1

Question

Chapter 1, Problem 4E

Program Plan Intro

Program Plan:

List of variables:

name: stores the name of the person.

birthdate: stores the date of birth entered by user.

worknum: stores the work phone number.

cellnum: stores the cell phone number.

List of functions used:

Write(): To display instructions in string to user.

Convert.ToInt32(): To convert the entered string into integer.

ReadLine(): To read input from user in string format.

Summary Introduction:

Program will use Main () method to prompt the user to enter values for name, birthdate, working phone number and cell phone number. These values are then printed using console.WriteLine().

Program Description:

Purpose of program is to enter values from user and display name, birthdate, work phone number and cell phone number in output.

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