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Practical Embedded Security by Timothy Stapko

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CHAPTER 2 Network Communications Protocols and Built-in Security

Embedded systems that are connected to any network, be it the full Internet or a small LAN, have to conform to the various protocols that have been designed and implemented to keep the network running—see Figure 1. Obviously, there must be communications protocols, including low-level (such as Ethernet or wireless technologies), medium level (such as TCP and IP), and high-level (HTTP, FTP). These protocols all work together to provide the vast array of services available from networked devices. Each of those levels, however, is subject to a number of different failures and attacks, and therefore, many protocols have been adapted to include a notion of security. For the low-level, ...

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