I want to use my desktop computer as my 2nd factor authentication device. I am not mobile and do not subscribe to a cell phone network. However, I have an Internet connection and a Google Voice number, which allows me to send and receive SMS messages like a person with a cell phone. Authy, a windows OS application for 2nd factor authentication, works with Google Voice. I also just noticed LastPass has a number of 2fa options in the security settings, along with their own authenticator. I'd like to use LastPass's authenticator because I imagine that it would automate the logins better than Authy (which I have to copy and paste the 2fa number from). However, LastPass only has mobile app options for cell phones, and no desktop authenticator. Why?
Not only can I not use LastPass's authenticator, I can't turn on 2fa for LastPass either since there appears to be zero support for a desktop authenticator.
Is there a Windows desktop version of the LastPass authenticator that I missed?
Is there a Lastpass 2fa security settings option for ANY Windows desktop authenticator, such as Authy?
My computer is as good (or as bad) as a cell phone as a 2nd factor authentication device. In many ways, cell phone networks are more insecure than the Internet. I cite the SS7 protocol's lack of secure authentication as a prime example of bad security associated with cell phone networks. I also cite lousy cell phone security associated with Google Android pre version 9. I also cite base station spoofings commonly done on cell phone networks by State spies and hackers.