We are a .Net shop that has standardized on WCF Services. We are in the processs of developing an iPhone application that needs to make secure web services calls to obtain d
An iPhone should be able to access a Certificate-secured WCF application. If you make your WCF service a RP of Azure ACS it should work using OAuth among other methods.
Take a look at the samples here for more: http://acs.codeplex.com/