While data disasters are inevitable, having a planned backup strategy can mitigate its damaging effects. According to the Cybersecurity and Infrastructure Security Agency, businesses and organizations should observe the 3-2-1 backup strategy for assured data safety. Superficially, the 3-2-1 backup rule is a backup strategy that increases and diversifies the number of backups used.

If you watched Mission Impossible: Rogue Nation, you probably remember the infamous Gait Analysis access control system. After the agent passes the main gate, enters the elevator with fingerprint recognition, and opens three unique-combination locks, he goes through a camera-based system that recognizes how he walks, talks, and moves his face.