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For the code given below, can you break down what algorithm is being displayed in the given code, please?        #include #include #include #include using namespace std;   int main() {     //Seed random number generator     srand(time(NULL));       //Declare variables     string message;     string encryptedMessage = "";     string decryptedMessage = "";     int myKey;       //Get message from user     cout << "Enter secret  message: ";     getline(cin, message);       //Get key from user     cout << "Enter a key: ";     cin >> myKey;       //Encrypt message     for (int i = 0; i < message.length(); i++)     {         //Substitution         if (isupper(message[i]))         {             encryptedMessage += (char)((message[i] + myKey - 65) % 26 + 65);         }         else         {             encryptedMessage += (char)((message[i] + myKey - 97) % 26 + 97);         }           //Permutation/Transposition         int j = rand() % message.length();         char temp = encryptedMessage[i];         encryptedMessage[i] = encryptedMessage[j];         encryptedMessage[j] = temp;     }       //Decrypt message     for (int i = 0; i < encryptedMessage.length(); i++)     {         //De-permutation/transposition         int j = rand() % message.length();         char temp = encryptedMessage[i];         encryptedMessage[i] = encryptedMessage[j];         encryptedMessage[j] = temp;           //De-substitution         if (isupper(encryptedMessage[i]))         {             decryptedMessage += (char)((encryptedMessage[i] - myKey - 65 + 26) % 26 + 65);         }         else         {             decryptedMessage += (char)((encryptedMessage[i] - myKey - 97 + 26) % 26 + 97);         }     }       //Print results     cout << "Encrypted message: " << encryptedMessage << endl;     cout << "Decrypted message: " << decryptedMessage; }

For the code given below, can you break down what algorithm is being displayed in the given code, please?        #include #include #include #include using namespace std;   int main() {     //Seed random number generator     srand(time(NULL));       //Declare variables     string message;     string encryptedMessage = "";     string decryptedMessage = "";     int myKey;       //Get message from user     cout << "Enter secret  message: ";     getline(cin, message);       //Get key from user     cout << "Enter a key: ";     cin >> myKey;       //Encrypt message     for (int i = 0; i < message.length(); i++)     {         //Substitution         if (isupper(message[i]))         {             encryptedMessage += (char)((message[i] + myKey - 65) % 26 + 65);         }         else         {             encryptedMessage += (char)((message[i] + myKey - 97) % 26 + 97);         }           //Permutation/Transposition         int j = rand() % message.length();         char temp = encryptedMessage[i];         encryptedMessage[i] = encryptedMessage[j];         encryptedMessage[j] = temp;     }       //Decrypt message     for (int i = 0; i < encryptedMessage.length(); i++)     {         //De-permutation/transposition         int j = rand() % message.length();         char temp = encryptedMessage[i];         encryptedMessage[i] = encryptedMessage[j];         encryptedMessage[j] = temp;           //De-substitution         if (isupper(encryptedMessage[i]))         {             decryptedMessage += (char)((encryptedMessage[i] - myKey - 65 + 26) % 26 + 65);         }         else         {             decryptedMessage += (char)((encryptedMessage[i] - myKey - 97 + 26) % 26 + 97);         }     }       //Print results     cout << "Encrypted message: " << encryptedMessage << endl;     cout << "Decrypted message: " << decryptedMessage; }

Computer Networking: A Top-Down Approach (7th Edition)
Computer Networking: A Top-Down Approach (7th Edition)
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Author:James Kurose, Keith Ross
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For the code given below, can you break down what algorithm is being displayed in the given code, please? 

 

 

 

#include <iostream>
#include <string>
#include <stdlib.h>
#include <time.h>
using namespace std;
 
int main()
{
    //Seed random number generator
    srand(time(NULL));
 
    //Declare variables
    string message;
    string encryptedMessage = "";
    string decryptedMessage = "";
    int myKey;
 
    //Get message from user
    cout << "Enter secret  message: ";
    getline(cin, message);
 
    //Get key from user
    cout << "Enter a key: ";
    cin >> myKey;
 
    //Encrypt message
    for (int i = 0; i < message.length(); i++)
    {
        //Substitution
        if (isupper(message[i]))
        {
            encryptedMessage += (char)((message[i] + myKey - 65) % 26 + 65);
        }
        else
        {
            encryptedMessage += (char)((message[i] + myKey - 97) % 26 + 97);
        }
 
        //Permutation/Transposition
        int j = rand() % message.length();
        char temp = encryptedMessage[i];
        encryptedMessage[i] = encryptedMessage[j];
        encryptedMessage[j] = temp;
    }
 
    //Decrypt message
    for (int i = 0; i < encryptedMessage.length(); i++)
    {
        //De-permutation/transposition
        int j = rand() % message.length();
        char temp = encryptedMessage[i];
        encryptedMessage[i] = encryptedMessage[j];
        encryptedMessage[j] = temp;
 
        //De-substitution
        if (isupper(encryptedMessage[i]))
        {
            decryptedMessage += (char)((encryptedMessage[i] - myKey - 65 + 26) % 26 + 65);
        }
        else
        {
            decryptedMessage += (char)((encryptedMessage[i] - myKey - 97 + 26) % 26 + 97);
        }
    }
 
    //Print results
    cout << "Encrypted message: " << encryptedMessage << endl;
    cout << "Decrypted message: " << decryptedMessage;
}

 

On Fri, Apr 22, 2022 at 10:23 AM Darian <darianfoster1010@gmail.com> wrote:
#include <iostream>
 
#include <string>
 
#include <stdlib.h>
 
#include <time.h>
 
using namespace std;
 
 
 
int main()
 
{
 
//Seed random number generator
 
srand(time(NULL));
 
 
 
//Declare variables
 
string message;
 
string encryptedMessage = "";
 
string decryptedMessage = "";
 
int key;
 
 
 
//Get message from user
 
cout << "Enter a message to encrypt: ";
 
getline(cin, message);
 
 
 
//Get key from user
 
cout << "Enter a key: ";
 
cin >> key;
 
 
 
//Encrypt message
 
for (int i = 0; i < message.length(); i++)
 
{
 
//Substitution
 
if(isupper(message[i]))
 
{
 
encryptedMessage += (char)((message[i] + key - 65) % 26 + 65);
 
}
 
else
 
{
 
encryptedMessage += (char)((message[i] + key - 97) % 26 + 97);
 
}
 
 
 
//Permutation/Transposition
 
int j =rand()% message.length();
 
char temp = encryptedMessage[i];
 
encryptedMessage[i] = encryptedMessage[j];
 
encryptedMessage[j] = temp;
 
}
 
 
 
//Decrypt message
 
for (int i = 0; i < encryptedMessage.length(); i++)
 
{
 
//De-permutation/transposition
 
int j =rand()% message.length();
 
char temp = encryptedMessage[i];
 
encryptedMessage[i] = encryptedMessage[j];
 
encryptedMessage[j] = temp;
 
 
 
//De-substitution
 
if(isupper(encryptedMessage[i]))
 
{
 
decryptedMessage += (char)((encryptedMessage[i] - key - 65 + 26) % 26 + 65);
 
}
 
else
 
{
 
decryptedMessage += (char)((encryptedMessage[i] - key - 97 + 26) % 26 + 97);
 
}
 
}
 
 
 
//Print results
 
cout << "Encrypted message: " << encryptedMessage << endl;
 
cout << "Decrypted message: " << decryptedMessage;
 
 
 
return 0;
 
}
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