Kim Dotcom's new venture, Mega, wants to shield itself from accusations of failing to take action against piracy.
It does so by using cryptography to make sure it doesn't see, and indeed cannot tell, what you've uploaded. But you have to get the crypto right...
Image may be NSFW.
Clik here to view.
Image may be NSFW.
Clik here to view.
Clik here to view.

Clik here to view.
