The USB Implementers Forum together with USB 3.0 Promoter Group have announced a new Authentication Protocol for USB Type-C. The non-profit and the group of companies which includes HP, Intel, and Microsoft among others, have agreed upon a protocol, which lets host systems assess the authenticity of connected devices using 128-bit encryption before any power or data has been transferred. For one, the authentication should help prevent damaged devices by cables, which don't strictly comply with the standard. So far that issue has been taken care of almost personally by Google's own...
Source: http://www.gsmarena.com/usb_typec_authentication_protocol_aims_to_solve_some_of_the_standards_issues-news-17756.php