Security Keys

Security Keys are physical devices, often in the form of a USB token or NFC tag, that provide a hardware-based second factor for authentication. They are designed to be resistant to phishing because they require physical presence and often involve a challenge-response protocol that binds the authentication to the specific domain of the service.

Unlike software-based codes, security keys cannot be intercepted by phishing sites, as the device will only respond to requests from the legitimate domain. This makes them one of the most secure forms of multi-factor authentication available today.

In the financial sector, they are increasingly used to protect high-value accounts and administrative access. They offer a balance of high security and user convenience.