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.

thanks
Sunil
sunilramuAsked:
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lunadlCommented:
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:
http://www.securityfocus.com/infocus/1868
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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,

http://www.acunetix.com/websitesecurity/ajax.htm
http://www.darknet.org.uk/2006/04/ajax-is-your-application-secure-enough/
http://searchsoa.techtarget.com/news/interview/0,289202,sid26_gci1164745,00.html
http://www.maxkiesler.com/index.php/weblog/comments/javascript_and_ajax_security_how_to_make_your_website_safe/
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