By Billy Hoffman
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Additional info for Ajax Security
While this is true for all architectures, thin-client programs (especially Web applications) tend to make many more round-trips than thick-client programs. Furthermore, Web applications communicate in HTTP, a wellknown, text-based protocol. If an attacker were to intercept an HTTP message, he could probably understand the contents. Thick-client programs often communicate in binary protocols, which are much more difficult for a third-party to interpret. Before, we ran 17 CHAPTER 1 INTRODUCTION TO AJAX SECURITY into security problems by leaving secrets on the user’s machine, outside of our control.
They don’t take up much space on the user’s machine. They don’t use much memory when they run. Most Web applications have a zero-footprint install, meaning they don’t require any disk space on the client machine at all. Query database Filter query results Calculate order cost Determine ship date Write bill of materials Server responsibilities Display UI Client responsibilities Figure 1-7 14 A sample thin-client architecture Handle user input THE AJAX ARCHITECTURE SHIFT Users were thrilled with the advantages that thin-client Web applications provided, but eventually the novelty of the Web started to wear off.
Ajax Security by Billy Hoffman