There are apps like Google Authenticator and Authy. There are hardware solutions like vasco's products[1], RSA securid tokens[2], ... [1] https://www.vasco.co

There are apps like Google Authenticator and Authy. There are hardware solutions like vasco's products[1], RSA securid tokens[2], ... [1] https://www.vasco.com/products/two-factor-authenticators/hardware/index.html https://www.vasco.com/products/two-factor-authenticators/har... [2] https://en.wikipedia.org/wiki/RSA_SecurID https://en.wikipedia.org/wiki/RSA_SecurID