tarunupaday··on Google: Security Keys Neutralized Employee PhishingNeither of them works with smartphone hence not of practical use.
tarunupaday··on Google: Security Keys Neutralized Employee Phishingthey 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.