Question TWO:(25 Marks) Simplified DES, which is a secure encryption algorithm developed by Professor Edward Schaefer, is an educational version of conventional DES. It has similar properties and structure to DES with much smaller parameters. Use the following parameters to generate the Sub-keys (Ki, K2) and the (Plaintext) for the given; initial key and Ciphertext.

Clearly, show the solution steps and make use of Charts attached in Appendix.​

answer:

// here is code in C++.

#include <bits/stdc++.h>

using namespace std;

//main function

int main()

{

  // variable

 int n;

 cout<<"enter a number:";

 // read the input

 cin>>n;

 // find the square root of the absolute value

 float square_root=sqrt(abs(n));

 // print the square_root

 cout<<"square root of "<<n<<" is: "<<square_root<<endl;

  return 0;

}

Explanation:

Read a number from user and assign it to "n".Then find its absolute value with abs() function.Then calculate the square root of the absolute value with sqrt() function.Print the square root of the number.

Output:

enter a number:-17

square root of -17 is: 4.12311

                                                         This is easy

                                                     sinserly Natalie 7 grader (this is not that hard)

answer:

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