docs: static byte[] RC4(final byte[] value, final byte[] key)
          throws AuthenticationException {
          try {
              final Cipher rc4 = Cipher.getInstance("RC4");
              rc4.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(key, "RC4"));
              return rc4.doFinal(value);
          } catch (final Exception e) {
              throw new AuthenticationException(e.getMessage(), e);
          }
      }