You can now use your Android devices as a hardware security key for Google account logins on iOS
Cross-OS two-factor authentication
Last week we discussed the basics of two-factor authentication (2FA) and we wanted to delve deeper into one of its methods that go beyond SMS and app-based authentication. The FIDO U2F keys act like secure pen drives you can use for two-factor authentication and the best part of all, they are less than $20.