It allowed hackers to steal digital keys that could be used to take over people's accounts.

这导致黑客可以利用窃取的数字钥匙来掌握人们的账号。

Is it a physical key, is it a digital key?

是实体钥匙还是数字钥匙？

As a digital key, I can click on the resident app main entry door and just like this you saw the door unlocked.

有了数字钥匙，就可以点击居民应用程序的主入口门，就像这样你看到门打开了。