Securing a remote ajax method call

Question

I have coded some JavaScript to perform an ajax call in an asp.net application. This triggers a method that calls a URL, sending some parameters in the POST.

The rec

Answer 1

You should secure you're service using SSL

Edit : I forgot the most "basic" : HTTP authentication (using login/password) I found a link but it's from 2003 : http://www-128.ibm.com/developerworks/webservices/library/ws-sec1.html

Edit 2 : As said in comments, I think the problem here fits in the purpose of REST web services... I don't know anything about asp.net but you should look forward to REST tutorials and see the security alternatives you have from HTTP authentication to full WS-Security implementation