how to encrypt and decrypt image in matlab using aes ppt - Printable Version +- Free Academic Seminars And Projects Reports (https://easyreport.in) +-- Forum: Academic (https://easyreport.in/forumdisplay.php?fid=41) +--- Forum: Academic Queries (https://easyreport.in/forumdisplay.php?fid=60) +---- Forum: Industrial Visit Report (https://easyreport.in/forumdisplay.php?fid=2) +---- Thread: how to encrypt and decrypt image in matlab using aes ppt (/showthread.php?tid=17541) |
how to encrypt and decrypt image in matlab using aes ppt - sanju1215 - 08-16-2017 package com.java.blowfish; import java.io.File; import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.security.InvalidKeyException; import java.security.NoSuchAlgorithmException; import javax.crypto.BadPaddingException; import javax.crypto.Cipher; import javax.crypto.IllegalBlockSizeException; import javax.crypto.KeyGenerator; import javax.crypto.NoSuchPaddingException; import javax.crypto.SecretKey; /** * * @author dhanoopbhaskar */ public class EncryptFile { KeyGenerator keyGenerator = null; SecretKey secretKey = null; Cipher cipher = null; public EncryptFile() { try { /** * Create a Blowfish key */ keyGenerator = KeyGenerator.getInstance("Blowfish"); secretKey = keyGenerator.generateKey(); /** * Create an instance of cipher mentioning the name of algorithm * - Blowfish */ cipher = Cipher.getInstance("Blowfish"); } catch (NoSuchPaddingException ex) { System.out.println(ex); } catch (NoSuchAlgorithmException ex) { System.out.println(ex); } } public static void main(String[] args) { String fileToEncrypt = "fileToEncrypt.jpg"; String encryptedFile = "encryptedFile.jpg"; String decryptedFile = "decryptedFile.jpg"; String directoryPath = "C:/Users/dhanoopbhaskar/Desktop/blowfish/"; EncryptFile encryptFile = new EncryptFile(); System.out.println("Starting Encryption.."); encryptFile.encrypt(directoryPath + fileToEncrypt, directoryPath + encryptedFile); System.out.println("Encryption completed.."); System.out.println("Starting Decryption.."); encryptFile.decrypt(directoryPath + encryptedFile, directoryPath + decryptedFile); System.out.println("Decryption completed.."); } /** * * @param srcPath * @param destPath * * Encrypts the file in srcPath and creates a file in destPath */ private void encrypt(String srcPath, String destPath) { File rawFile = new File(srcPath); File encryptedFile = new File(destPath); InputStream inStream = null; OutputStream outStream = null; try { /** * Initialize the cipher for encryption */ cipher.init(Cipher.ENCRYPT_MODE, secretKey); /** * Initialize input and output streams */ inStream = new FileInputStream(rawFile); outStream = new FileOutputStream(encryptedFile); byte[] buffer = new byte[1024]; int len; while ((len = inStream.read(buffer)) > 0) { outStream.write(cipher.update(buffer, 0, len)); outStream.flush(); } outStream.write(cipher.doFinal()); inStream.close(); outStream.close(); } catch (IllegalBlockSizeException ex) { System.out.println(ex); } catch (BadPaddingException ex) { System.out.println(ex); } catch (InvalidKeyException ex) { System.out.println(ex); } catch (FileNotFoundException ex) { System.out.println(ex); } catch (IOException ex) { System.out.println(ex); } } /** * * @param srcPath * @param destPath * * Decrypts the file in srcPath and creates a file in destPath */ private void decrypt(String srcPath, String destPath) { File encryptedFile = new File(srcPath); File decryptedFile = new File(destPath); InputStream inStream = null; OutputStream outStream = null; try { /** * Initialize the cipher for decryption */ cipher.init(Cipher.DECRYPT_MODE, secretKey); /** * Initialize input and output streams */ inStream = new FileInputStream(encryptedFile); outStream = new FileOutputStream(decryptedFile); byte[] buffer = new byte[1024]; int len; while ((len = inStream.read(buffer)) > 0) { outStream.write(cipher.update(buffer, 0, len)); outStream.flush(); } outStream.write(cipher.doFinal()); inStream.close(); outStream.close(); } catch (IllegalBlockSizeException ex) { System.out.println(ex); } catch (BadPaddingException ex) { System.out.println(ex); } catch (InvalidKeyException ex) { System.out.println(ex); } catch (FileNotFoundException ex) { System.out.println(ex); } catch (IOException ex) { System.out.println(ex); } } } how to encrypt and decrypt image in matlab using aes ppt - sarika - 08-16-2017 hi. My name is jeevan. I would like to get details on how to encrypt and decrypt image in Matlab using AES algorithm. kindly help me. |