Hacker News Reader

Parent Full thread

tarunupaday

they are not that cheap.

the only yubikey that works with mobiles (NFC) is $50. the cheapest u2f I could find (it only has usb-a port) is $20.

View on HN

There are at least two U2F keys I was able to find on Amazon which were under $10 USD:

https://www.amazon.com/dp/B01N6XNC01 https://www.amazon.com/dp/B01L9DUPK6

The latter is an open source / open hardware design:

https://github.com/conorpp/u2f-zero

Neither of them works with smartphone hence not of practical use.

I think you might be having trouble with the concept of a U2F token. The mail application on your phone doesn't need a token; it already has a long-term cryptographic binding to the server.

Reply on news.ycombinator.com