This is exactly what Bitcasa does. * Integrate directly into the OS and intercept the filesystem calls * We encrypt client side using keys that aren't expo

This is exactly what Bitcasa does. * Integrate directly into the OS and intercept the filesystem calls * We encrypt client side using keys that aren't exposed to the server. * Stream the content in real time like Spotify or Netflix and enable random access * Cache frequently used items locally * Works across multiple devices and platforms * We're building primary storage vs backup or sync Its a well thought out system. Full disclosure - I'm the founder and CEO of Bitcasa.