Introduction to the Sample App
The Keychain sample app is a single-view app that will secure a credit card number along with relevant user information, such as name and expiration date. To access the information, the user sets a PIN on first launch. Both the PIN and the credit card information are secured using the Keychain.
Note
The Keychain does not work on the iOS simulator as of iOS 7. The wrapper class provided by Apple and used in this chapter does make considerable efforts to properly simulate the Keychain behaviors. In addition, since code being executed on the simulator is not code signed, it is important to keep in mind that there are no restrictions on which apps can access Keychain items. It is highly recommended that Keychain development ...
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