By Billy Hoffman
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Additional resources for Ajax Security
In terms of security, however, Ajax is actually the worst of both worlds. It has the inherent security vulnerabilities of both architectures. 15 CHAPTER 1 INTRODUCTION TO AJAX SECURITY Query database Filter query results Determine ship date Write bill of materials Server responsibilities Display UI Handle user input Calculate order cost Client responsibilities Figure 1-8 A sample Ajax architecture: evenly balanced between the client and server A SECURITY PERSPECTIVE:THICK-CLIENT APPLICATIONS The major security concern with thick-client applications is that so much of the application logic resides on the user’s machine—outside the effective control of the owner.
Change the price of the song by modifying the value of the songPrice variable. While it is true that he can already get songs for free simply by skipping over the 21 CHAPTER 1 • INTRODUCTION TO AJAX SECURITY debitAccount function, he might check to see if the server accepts negative values for the songPrice parameter. If this worked, the store would actually be paying the hacker to take the music. Obtain the current balance of any user’s account. Because the getAccountBalance function does not require a corresponding password parameter for the username parameter, that information is available just by knowing the username.
Ajax Security by Billy Hoffman