We are building a mobile app and want people to be able to enter in their credit card information once and store them online using a third party if possible. We want to process their credit card thru the app only when it is required. I am not sure if paypal does that but I did not find anything in their iOS SDK. Can somebody please let me know the best way to do that? Remember this is a mobile app not a web app.
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You might want to take a look at the Keychain API for iOS, though you could save the information using NSUserDefault, it likely wouldn't be secure(I wouldn't be able instruct you on how to hash/secure it). You're legally not allowed to save the 3 digit security code, so you'll still have to confirm that when the user is checking out on your app.
Eric Lang
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I want to store it somewhere online.. IF I store it in the app, we wont have any control over the user – user970334 Sep 16 '13 at 14:46