If you follow this blog, you probably already know that MPC allows a set of parties to compute any function of their inputs without compromising the privacy of their data.

The number of real world situations where MPC can be used to solve apparently unsolvable problems is only limited by our imagination, as this recent video from the Estonian team behind the Sharemind project shows:

If you can’t watch the video, here is a short summary: the growing number of satellites orbiting the planet is increasing the danger of collisions. This is not only a theoretical scenario, and two satellites actually crashed in 2009. This could be avoided by sharing (exact) information about the satellites orbits. However, satellite owners are not willing to make the orbits of their satellites public.  But using MPC, the parties can cooperate and learn whether a collision is going to happen and nothing else!

More information can be found the Sharemind’s blog. If you want to know more about secure computation techniques you can visit the MPC Lounge (currently under construction).