What functionality does Force.com Canvas provide when embedding web apps?

Force.com Canvas is specifically designed for embedding web applications into Salesforce in a seamless manner, ensuring that these applications can interact effectively with the Salesforce environment. One of the primary functionalities it offers is providing context and access control for users.

When a web app is embedded using Force.com Canvas, it receives context about the current user, such as their profile, permissions, and records they are interacting with. This contextual information helps the embedded app to tailor its functionality to the specific user, enhancing usability and security. Additionally, the access control ensures that the embedded app adheres to the security framework established within Salesforce, meaning that users can only access data and perform actions that they are authorized for, maintaining the integrity of the Salesforce environment.

The other options do not fully capture the essence of what Force.com Canvas provides. It is not limited solely to user authentication or focused on full access to data processing independently; rather, it integrates user experience with context, making it crucial for integrated applications. While analytics might be a feature of associated Salesforce tools, it is not a direct functionality of Force.com Canvas itself.