Most people are not trying to stop a determined attacker. Most people just want random people to not get be able to get into their stuff--same as a physical lock.
They carry a physical key on their person. It's not too much to ask them to carry a "digital" key on their key ring.
The problem is that most "digital" keys are a pain in the ass:
1) Mostly because everybody wants to "centralize" authentication so that they can charge you and administrate you.
2) Secondarily because there is no good solution for talking to the key on your person. NFC sucks. USB requires that I plug my key in. WiFi requires that the device be able to hit your network. BLE has no access from web pages.
BLE is probably the best choice, but there is no real money in making it work.
What's your threat?
Most people are not trying to stop a determined attacker. Most people just want random people to not get be able to get into their stuff--same as a physical lock.
They carry a physical key on their person. It's not too much to ask them to carry a "digital" key on their key ring.
The problem is that most "digital" keys are a pain in the ass:
1) Mostly because everybody wants to "centralize" authentication so that they can charge you and administrate you.
2) Secondarily because there is no good solution for talking to the key on your person. NFC sucks. USB requires that I plug my key in. WiFi requires that the device be able to hit your network. BLE has no access from web pages.
BLE is probably the best choice, but there is no real money in making it work.