"Faster and safer than typing a password. Just Knock."

I tend to leave my phone on my desk. And that goes for both at home and at work. (I don&#x27;t use 2-factor authentication, so I&#x27;m not terribly worried.) All that means is someone has to walk up to my desk, knock on my phone, and steal my passwords.<p>Hmm, I&#x27;m not thinking so. I think I&#x27;ll stick with entering a password!

Just installed it. It works great. As somebody that always has their phone in their pocket, this is perfect and more than worth the $4.

How does the Mac authenticate a phone with Knock? Does it use HMAC-based One-Time Passwords (HOTPs) like Google Authenticator?

That looks terribly inconvenient. Especially the part with me deliberately knocking on my rather expensive smartphone.