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Posez votre questionimport java.io.*; import java.nio.ByteBuffer; import java.nio.channels.FileChannel; import javax.crypto.BadPaddingException; import javax.crypto.IllegalBlockSizeException; import javax.crypto.NoSuchPaddingException; import javax.crypto.SecretKey; import javax.crypto.Cipher; import javax.crypto.spec.IvParameterSpec; import javax.crypto.spec.PBEKeySpec; import javax.crypto.spec.PBEParameterSpec; import javax.crypto.spec.SecretKeySpec; import java.security.*; import java.util.*; import javax.crypto.*; import java.security.spec.AlgorithmParameterSpec; import java.security.spec.KeySpec; import javax.crypto.KeyGenerator; public class table { // 8-byte Salt static byte[] salt = { (byte)0xA9, (byte)0x9B, (byte)0xC8, (byte)0x32, (byte)0x56, (byte)0x35, (byte)0xE3, (byte)0x03 }; // Iteration count static int iterationCount = 19; static Cipher ecipher = null; static Cipher dcipher = null; static BufferedReader lecteurAvecBuffer = null; static String ligne; static byte[] retourL = "\n".getBytes(); public static void main(String[] args) throws IOException, NoSuchAlgorithmException, NoSuchPaddingException, InvalidKeyException, IllegalBlockSizeException, BadPaddingException { try { // Create encrypter/decrypter class desEncrypter("My Pass Phrase!"); // Encrypt lecteurAvecBuffer = new BufferedReader(new FileReader("C:\\workspace\\apiFroggy\\bin\\test\\test.properties")); while ((ligne = lecteurAvecBuffer.readLine()) != null){ System.out.println("ligne -> "+ligne); String encrypted = encrypt(ligne); byte[] buffer = encrypted.getBytes(); System.out.println("byte -> "+buffer); FileOutputStream envfos = new FileOutputStream("C:\\workspace\\apiFroggy\\bin\\fichier_crypt.txt",true); envfos.write(buffer); envfos.write(retourL); envfos.close(); } lecteurAvecBuffer = new BufferedReader(new FileReader("C:\\workspace\\apiFroggy\\bin\\fichier_crypt.txt")); while ((ligne = lecteurAvecBuffer.readLine()) != null){ String decrypted = decrypt(ligne); byte[] buffer = decrypted.getBytes(); FileOutputStream envfos = new FileOutputStream("C:\\workspace\\apiFroggy\\bin\\fichier_new.txt",true); envfos.write(buffer); envfos.write(retourL); envfos.close(); } } catch (Exception e){ } } public static void desEncrypter(String passPhrase) { try { // Create the key KeySpec keySpec = new PBEKeySpec(passPhrase.toCharArray(), salt, iterationCount); SecretKey key = SecretKeyFactory.getInstance( "PBEWithMD5AndDES").generateSecret(keySpec); ecipher = Cipher.getInstance(key.getAlgorithm()); dcipher = Cipher.getInstance(key.getAlgorithm()); // Prepare the parameter to the ciphers AlgorithmParameterSpec paramSpec = new PBEParameterSpec(salt, iterationCount); // Create the ciphers ecipher.init(Cipher.ENCRYPT_MODE, key, paramSpec); dcipher.init(Cipher.DECRYPT_MODE, key, paramSpec); } catch (java.security.InvalidAlgorithmParameterException e) { } catch (java.security.spec.InvalidKeySpecException e) { } catch (javax.crypto.NoSuchPaddingException e) { } catch (java.security.NoSuchAlgorithmException e) { } catch (java.security.InvalidKeyException e) { } } public static String encrypt(String str) { try { // Encode the string into bytes using utf-8 byte[] utf8 = str.getBytes("UTF8"); // Encrypt byte[] enc = ecipher.doFinal(utf8); // Encode bytes to base64 to get a string return new sun.misc.BASE64Encoder().encode(enc); } catch (javax.crypto.BadPaddingException e) { } catch (IllegalBlockSizeException e) { } catch (UnsupportedEncodingException e) { } catch (java.io.IOException e) { } return null; } public static String decrypt(String str) { try { // Decode base64 to get bytes byte[] dec = new sun.misc.BASE64Decoder().decodeBuffer(str); // Decrypt byte[] utf8 = dcipher.doFinal(dec); // Decode using utf-8 return new String(utf8, "UTF8"); } catch (javax.crypto.BadPaddingException e) { } catch (IllegalBlockSizeException e) { } catch (UnsupportedEncodingException e) { } catch (java.io.IOException e) { } return null; } }