Meet Noke, a water-resistant, connected padlock that doesn't need a physical key to be unlocked — the clue is in the name, which is pronounced ‘no-key.’ Instead it uses Bluetooth connectivity as the unlocking mechanism, triggered when your smartphone is nearby.
Keys have been used to open locks for centuries. But keys have the same problems today as they did back then. They are easy to lose, they can be stolen, they are a pain to share, and if you share them, you must get them back. Sharing combinations has its own set of issues.