I have an iOS app that needs to be able to upload data in the background, and so also when the device is locked. To achieve background uploading I use information stored in the key chain. Therefore I can only set key chain access to be when first unlocked on this device only, to be able to access it in the background and when locked.
In simple terms who can access that key chain information when the device is unlocked. I'm not worried about a professional forensic hacker, but someone with a tool which can access the device files system, such as iExplorer.
Could they access this information if they found my device unlocked, if not, what is stopping them accessing it.