The technical angle which is most of interest to me are building systems which preserve evidence. For example, how do you build a cloud sync service which preve

The technical angle which is most of interest to me are building systems which preserve evidence. For example, how do you build a cloud sync service which prevents someone other than the owner of the phone from deleting videos without the owner’s consent (or in ways which allow them to regain access after being released) while still allowing people to delete things they might not want a hostile government to see. There are no silver bullets here but some really interesting trade offs.