The Internet of Things (IoT) is a new emerging system of interconnected devices that experiences significant growth in a wide variety of applications. The rising communication technologies for IoT are the Low Power Wide Area Networks (LPWANs) having long range, low cost and low power characteristics. In this context, an important part of the applications requires the mobility of the end devices with secure communications. In this paper, we consider the mobility management solutions in LPWAN networks and we investigate how they ensure security. We first review the basic IoT security requirements and the typical IoT protocol stack. We then focus on the existing mobility management solutions in LPWAN and we highlight the mobility related security issues by checking the attacks that can be performed in case of mobility. Furthermore, we evaluate the security in each mobility solution by checking the aforementioned attacks and we draw a comparison study.

物联网（IoT）是一个互连设备的新兴系统，在各种应用程序中均经历了显着增长。物联网的新兴通信技术是具有长距离，低成本和低功耗特性的低功耗广域网（LPWAN）。在这种情况下，应用程序的重要部分要求具有安全通信的终端设备的移动性。在本文中，我们考虑了LPWAN网络中的移动性管理解决方案，并研究了它们如何确保安全性。我们首先回顾基本的物联网安全要求和典型的物联网协议栈。然后，我们专注于LPWAN中现有的移动性管理解决方案，并通过检查在移动性情况下可以执行的攻击来突出显示与移动性相关的安全性问题。此外，