How to avoid IllegalBlockSizeException?

Hello, I still obtaining following Exception randomly during the sync (encrypt/decrypt) of the values. I have no idea how to avoid the following Exception, what I'm doing wrong? Encryption/Decryption is processed in async services. Many thanks for any hint.

03-05 10:29:28.624 2633-2835/? W/System.err: javax.crypto.IllegalBlockSizeException: error:1e00007b:Cipher functions:OPENSSL_internal:WRONG_FINAL_BLOCK_LENGTH 03-05 10:29:28.624 2633-2835/? W/System.err: at com.android.org.conscrypt.NativeCrypto.EVP_CipherFinal_ex(Native Method) 03-05 10:29:28.624 2633-2835/? W/System.err: at com.android.org.conscrypt.OpenSSLCipher$EVP_CIPHER.doFinalInternal(OpenSSLCipher.java:570) 03-05 10:29:28.624 2633-2835/? W/System.err: at com.android.org.conscrypt.OpenSSLCipher.engineDoFinal(OpenSSLCipher.java:351) 03-05 10:29:28.624 2633-2835/? W/System.err: at javax.crypto.Cipher.doFinal(Cipher.java:1736) 03-05 10:29:28.624 2633-2835/? W/System.err: at se.simbio.encryption.Encryption.decrypt(Encryption.java:179) 03-05 10:29:28.624 2633-2835/? W/System.err: at com.mypackage.security.Security.decryptString(Security.java:127) 03-05 10:29:28.624 2633-2835/? W/System.err: at android.os.AsyncTask$2.call(AsyncTask.java:333) 03-05 10:29:28.624 2633-2835/? W/System.err: at java.util.concurrent.FutureTask.run(FutureTask.java:266) 03-05 10:29:28.624 2633-2835/? W/System.err: at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:245) 03-05 10:29:28.624 2633-2835/? W/System.err: at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1162) 03-05 10:29:28.624 2633-2835/? W/System.err: at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:636) 03-05 10:29:28.624 2633-2835/? W/System.err: at java.lang.Thread.run(Thread.java:764)

My Encrypt, Decrypt methods are following:

public String decryptString(final String string, Context context) {
        String decryptedString;
        if (Constants.Global.ENCRYPTION_ENABLED) {
            //Logger.d("decrypting " + string);
            if (string != null) {
                try {
                    decryptedString = encryptionInstance.decrypt(string);
                } catch (Exception e) {
                    decryptedString = "";
                    e.printStackTrace();
                }
            } else {
                decryptedString = "";
            }
        } else {
            decryptedString = string;
        }
        return decryptedString;
    }

public String encryptString(final String string, Context context) {
        String encryptedString;
        if(Constants.Global.ENCRYPTION_ENABLED) {
            //Logger.d("encrypting " + string);
            if(string != null) {
                try {
                    encryptedString = encryptionInstance.encrypt(string);
                } catch (Exception e) {
                    encryptedString = "";
                    e.printStackTrace();
                }
            } else {
                encryptedString = "";
            }
        } else {
            encryptedString  = string;
        }
        return encryptedString;
    }

simbiose / Encryption

How to avoid IllegalBlockSizeException? #20