Ajax application and security issues

i am looking for materials to research on AJAX performance and security issues in web applications with a large user base.

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Have you been to the security focus site? Its good as a primer for AJAX security, without going into too much detail about the specific ajax app you're building I can offer you this article:
Loganathan NatarajanLAMP DeveloperCommented:
there are major issues to be considered on AJAX application ... specially on the requests ... between client & server ... it is very important that we must validate the requests well ... also the regular security measures to be considered as well .. like SQL injection , form check, input validation etc.,

have a look at these also,


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