As noted by Life On My Mobile, the first beta version of iOS 7 includes a system for warning users when they are using unauthorized cables or accessories with their devices. The software does not, however, prevent the cables or accessories from functioning.
Apple has added a warning when you plug an unauthorized charge / sync Lightning cable into your iPhone 5. The popup message states "This cable or accessory is not certified and may not work reliably with this iPhone."
Apple's Lightning connectors use several chips to manage dynamic pin assignment for the diminutive connector, chips which also allow Apple to recognize whether the connectors come from authorized channels.
Article Link: iOS 7 Beta Warns Users When Using Unauthorized Lightning Cables and Accessories