4. Encryption is used to secure data messages in computer networks. One possible way of encryptingtext consists of rewriting the text by including first the characters found at even indexes (startingfrom 0) followed by the characters stored at odd indexes, while ignoring whitespace characters.For instance, the String "Exam is fun" can be encoded using the previously explainedtechnique as "Easfnxmiu". To be able to recover the original message based on the encryptedversion of the message, some additional information should be added to the encrypted message,namely, the number of characters found at even indexes, the number of characters found at oddindexes, and the indexes at which the white space characters existed in the original message. Inthis way, reconsidering our previous example, the string "Exam is fun" can be encodedusing the previously explained technique as "5 4 4 7 Easfnxmiu". This is particularly truesince the original message had 5 characters at even indexes (i.e., Easfn), 4 characters at oddindexes (i.e.., xmiu) and two spaces at indexes 4 and 7, respectively.When reconstructing the original message based on "5 4 4 7 Easfnxmiu" in this example, anew String is created, the portion containing the characters is extracted, and then characters aretaken from both sides of that portion (the even-index characters and odd-index characters) until theindex of a white space character is reached. The process is then repeated to reconstruct all of theremaining words of the original message.Write a Java program called EncryptDecrypt that reads a String from the user called Sand then prints out to the screen a new String called encrypteds that repiesents theencrypted version of S as per the encryption technique described above. Then your programshould use encrypteds to recover the original message using the decryption techniqueexplained above and store the decrypted message in a variable called decrypteds that shouldbe printed out to the screen.

import java.util.Scanner;public class EncryptDecrypt{ //encryption method public static String…

Answered: Write a Java program called…

Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

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