@Arun.Kothapalli  Below is the function code used to encrypt the string.

String inputStr=StrMessage;  String keyFile=PubKEYFile;          SecureRandom rand = new SecureRandom(); byte[] salt = new byte[32]; rand.nextBytes(salt); int iterationCount = rand.nextInt(2048);

try {             byte[] iv = new byte[32];           IvParameterSpec ivspec = new IvParameterSpec(iv);                 SecretKeyFactory factory = SecretKeyFactory.getInstance("PBKDF2WithHmacSHA256");           KeySpec spec = new PBEKeySpec(PubKEYFile.toCharArray(), salt, iterationCount, 256);           SecretKey tmp = factory.generateSecret(spec);           SecretKeySpec secretKey = new SecretKeySpec(tmp.getEncoded(), "AES");                 Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");           cipher.init(Cipher.ENCRYPT_MODE, secretKey, ivspec);           return Base64.getEncoder().encodeToString(cipher.doFinal(inputStr.getBytes(StandardCharsets.UTF_8)));         }  catch (Exception e) {          oLog.infoForced("Unable to encrypt");         }         return "Unable to Encrypt";