Unauthorized Ligthning cables elicit a warning in iOS 7
If you are testing the iOS 7 beta and use an unauthorized Lightning connector, don't be surprised if your Apple iPhone reminds you that the connector is not an authorized Apple part. The warning, which covers the entire screen, reads, "This cable or accessory is not certified and may not work reliably with this iPhone." In this case, Apple's bark is worse than its bite as you can simply choose to ignore the warning and continue using iOS 7.
Because the new operating system is in beta, it is not clear whether this warning will be part of the final build. You might recall that Apple placed an authentication chip inside the Lightning connector. While the warning message was used by Apple before with its 30 pin connector, this is the first time that it has appeared on devices using the new Lightning cable.
source: AppleInsider
You will be warned if you're using an unauthorized Lightning connector while testing iOS 7
source: AppleInsider
Things that are NOT allowed: