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9 When one compute process needs to communicate to another, it does so with networking.
11 The service side is always compute process, but the client can be of two types:
12 - People (via browser, or perhaps command line tool)
13 - Compute process talking to another computer process.
15 Thus, the essential building blocks of any networked system is made up of
18 In larger systems, it is atypical
20 Communicating *Securely*
21 ------------------------
22 Whenever two processing entities exist that need to communicate securely, it is *essential* that
23 - The communications between the two are encrypted
24 - The identities of the caller and callee are established (authentication)
25 - The caller must be allowed to do what it is asking to do (authorization)