Stackoverflow question comparing Multipeer with WiFi Direct: http://stackoverflow.com/questions/19067794/ios-7-multipeer-...

Multipeer and WiFi Direct are not compatible. Stackoverflow user @barbazoo hypothesizes Multipeer is using Bluetooth Classic.

iOS Bluetooth Classic is known the be under the Apple MFA Accessory API tight control and lockdown, including the MFA authentication challenge-reposne. Apple controls the MFA encryption keys (either in software or by the accessory authentication chips). It makes it inaccessible to other platforms.