固定無線通信系統(tǒng)

　　本文著眼于在RF系統(tǒng)的安全性的關(guān)鍵問題。雖然安全成為任何東西的互聯(lián)網(wǎng)的一個(gè)重要因素，它增加了額外的復(fù)雜性，設(shè)計(jì)和開發(fā)。本文著眼于不同的物聯(lián)網(wǎng)實(shí)現(xiàn)的安全性影響，從低功耗ISM網(wǎng)絡(luò)，如ZigBee和線程到更大規(guī)模的Wi-Fi網(wǎng)絡(luò)。

　　物聯(lián)網(wǎng)的發(fā)展與許多不同的無線技術(shù)，這突出了需要不同的安全方法。隨著越來越多的設(shè)備故意在互聯(lián)網(wǎng)上訪問，許多不同的安全方法，為不同的協(xié)議正在出現(xiàn)。有不同的安全系統(tǒng)的Wi-Fi，ZigBee和藍(lán)牙，以及專有的無線網(wǎng)絡(luò)，如灰塵，有自己的安全技術(shù)。所有這些都是基于相同的cryptographics要領(lǐng)，但有不同的實(shí)現(xiàn)和支持組件。

　　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）.