https://www.google.com/landing/2step/features.html
denediniz mi?
Veya,

Security Key var:
https://support.google.com/accounts/.../6103523?hl=en

http://www.amazon.com/s/?field-keywo...urity%20Key%22

http://www.ozengen.com/security-key-...il-kullanilir/