Using SIMPLE java, I need some help with file encryption. Looking for a way to include the ability to decrypt encrypted messages. The decryption program should read the contents of "Encrypted.txt", restore the data to its original state, and write it to a file named "Decrypted.txt". Also demonstrate appropriate exception handling for file I/O. Thanks! Here is code I have and I need help with the decryptFile method. public class Crypto { /** The decryptFile method decrypts an encrypted file. @param existing The name of the existing file to decrypt. @param decrypted The name of the decrypted file to create. @exception IOException When an IO error occurs. */ private static final byte KEY = 10; public static void decryptFile(String existing, String encrypted) { } public class FileDecryptionFilter { public static void main(String[] args) { System.out.println("Decrypting the contents of the file"); System.out.println("Encrypted.txt. The encrypted file will"); System.out.println("be stored as MyLetters.txt"); try { Crypto.decryptFile("src//Encrypted.txt", "src//Decrypted.txt"); System.out.println("Done. Use Notepad to inspect the decrypted file."); } catch (IOException e) { System.out.println("Error - " + e.getMessage()); } } }

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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Using SIMPLE java, I need some help with file encryption. Looking for a way to include the ability to decrypt encrypted messages. The decryption program should read the contents of "Encrypted.txt", restore the data to its original state, and write it to a file named "Decrypted.txt". Also demonstrate appropriate exception handling for file I/O. Thanks!

Here is code I have and I need help with the decryptFile method.

public class Crypto
{
/**
The decryptFile method decrypts an encrypted file.
@param existing The name of the existing file to decrypt.
@param decrypted The name of the decrypted file to create.
@exception IOException When an IO error occurs.
*/

private static final byte KEY = 10;

public static void decryptFile(String existing, String encrypted)
{

}

public class FileDecryptionFilter
{
public static void main(String[] args)
{
System.out.println("Decrypting the contents of the file");
System.out.println("Encrypted.txt. The encrypted file will");
System.out.println("be stored as MyLetters.txt");

try
{
Crypto.decryptFile("src//Encrypted.txt", "src//Decrypted.txt");
System.out.println("Done. Use Notepad to inspect the decrypted file.");
}
catch (IOException e)
{
System.out.println("Error - " + e.getMessage());
}
}
}