固定无线通信系统

　　固定无线通信系统

　　本文着眼于在RF系统的安全性的关键问题。虽然安全成为任何东西的互联网的一个重要因素，它增加了额外的复杂性，设计和开发。本文着眼于不同的物联网实现的安全性影响，从低功耗ISM网络，如ZigBee和线程到更大规模的Wi-Fi网络。

　　物联网的发展与许多不同的无线技术，这突出了需要不同的安全方法。随着越来越多的设备故意在互联网上访问，许多不同的安全方法，为不同的协议正在出现。有不同的安全系统的Wi-Fi，ZigBee和蓝牙，以及专有的无线网络，如灰尘，有自己的安全技术。所有这些都是基于相同的cryptographics要领，但有不同的实现和支持组件。

　　Early implementations of the IoT took little regard for security. While there was concern to protect the code in a microcontroller from being copied （or changed， which is a security issue） there was less focus on securing the wireless link. Some took the approach of ‘security by security’， where developers were fairly confident that hackers would not find the devices. That has been shown to be optimistic by recent situations where wireless cameras have been easily accessible， with that access collected into a website for easy viewing.

　　Now， securing a wireless IoT network is essential from end-to-end to prevent a wide range of possible attacks. However， there are many different layers of security within such a system， from the access control to prevent unauthorized use of a node， to protecting the data flowing between nodes and gateways with encryption. The overall system configuration and security management also has to be protected （which is essentially the same as the root mode in an operating system）.