Book Image

IoT and Edge Computing for Architects - Second Edition

By : Perry Lea
Book Image

IoT and Edge Computing for Architects - Second Edition

By: Perry Lea

Overview of this book

Industries are embracing IoT technologies to improve operational expenses, product life, and people's well-being. An architectural guide is needed if you want to traverse the spectrum of technologies needed to build a successful IoT system, whether that's a single device or millions of IoT devices. IoT and Edge Computing for Architects, Second Edition encompasses the entire spectrum of IoT solutions, from IoT sensors to the cloud. It examines modern sensor systems, focusing on their power and functionality. It also looks at communication theory, paying close attention to near-range PAN, including the new Bluetooth® 5.0 specification and mesh networks. Then, the book explores IP-based communication in LAN and WAN, including 802.11ah, 5G LTE cellular, Sigfox, and LoRaWAN. It also explains edge computing, routing and gateways, and their role in fog computing, as well as the messaging protocols of MQTT 5.0 and CoAP. With the data now in internet form, you'll get an understanding of cloud and fog architectures, including the OpenFog standards. The book wraps up the analytics portion with the application of statistical analysis, complex event processing, and deep learning models. The book then concludes by providing a holistic view of IoT security, cryptography, and shell security in addition to software-defined perimeters and blockchains.
Table of Contents (17 chapters)
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Shell security

We have examined hardware security up to this point, but the architect must also consider network and shell security of the system. Network security is covered in Chapter 9, Edge Routing and Networking. We will explore one area of shell connectivity in this section: SSH, or secure shell.

SSH is a cryptographic network protocol used to provide services like login, command-line control, remote access, and root access to modern operating systems. SSH uses a secure channel over an unsecure network, employing methods such as SHA-2 and SHA25. Additionally, authentication is performed using various methods, such as public key exchange or simple passwords. Typically, SSH sessions use port 22.

Although the protocol uses authentication and encryption methods, there are still vulnerabilities:

  • A preferred method is to use public key exchange when authenticating. These are far better than password-based security.
  • A typical attack vector is brute force...