void store(OutputStream outputStream) throws IOException, GeneralSecurityException {
            ObjectOutputStream oos = new ObjectOutputStream(outputStream);
            oos.writeInt(VERSION);
            Enumeration<String> ksAliases = dataKeyStore.aliases();
            while(ksAliases.hasMoreElements()) {
                String alias = ksAliases.nextElement();
                KeyStore.Entry entry = dataKeyStore.getEntry(alias, convertParameter(protectionParameter));
                if (entry instanceof KeyStore.SecretKeyEntry) {
                    saveSecretKey(alias, oos, (KeyStore.SecretKeyEntry)entry);
                } else {
                    throw log.unrecognizedEntryType(entry.getClass().getCanonicalName());
                }
            }
            oos.flush();
            oos.close();
        }