Question

(Java code only)You are going to use the techniques you learned in number theory to create a cipher. Do not use any libraries for your cipher, instead create your own algorithm from scratch.

Cipher the following text: "I love discrete structures because it makes me a better computer scientist."

Answer 1

import java.util.*;
  
class Main
{
public static void main(String args[ ])
{
//string variable declaration
String plainText, cipherText="";
  
//display message
System.out.print("Enter the String you want to Encrypt: \n");
try
{
Scanner in=new Scanner(System.in);
  
//get input from the user
plainText = in.nextLine();
  
for (int i=0; i<plainText.length(); i++)
{
char ch = Character.toLowerCase(plainText.charAt(i));
int c = ch;
c = c + 5;
ch = (char) c;
cipherText = cipherText + ch;
}
}
  
//catch exception
catch(Exception ioe)
{
ioe.printStackTrace();
}
  
//display cipher text
System.out.println("The cipher text is: \n" +cipherText);
}
}

OTUPUT:

Enter the String you want to Encrypt: I love the discrete structures because it makes me a better computer scientiest. The cipher text is: n&qt{j&ymjfinxhwjyj*xywzhyzwjxxgjhfzxjtny&rfpjxtrj*f&gjyyjw8htruzyjwxxhnjsynjxy3