What authentication method does SWA use?

SWA, or Secure Web Authentication, is designed specifically to help users authenticate to web applications that do not provide support for more modern authentication protocols, like OAuth or SAML. The browser plugin enables users to log in securely by securely passing their credentials to the application without exposing them to potential security threats such as keyloggers or phishing attempts.

When using SWA, the plugin automatically fills in the login fields of the web application with the user's credentials. This method allows for a seamless and secure login process while still adhering to the traditional username and password paradigm that many older web applications utilize. It bridges the gap between legacy systems and modern security practices, ensuring that sensitive information remains protected during the authentication process.

The other options involve different forms of authentication methods that may not align with the specific design and purpose of SWA. For example, direct API calls might apply for more modern, API-driven applications, while token-based authentication relates to systems that support OAuth or similar standards. Username and password entry alone does not embody the secure mechanism offered by the browser plugin, which enhances the entry process significantly. Thus, the browser plugin is indeed the correct representation of how SWA facilitates authentication.