Face recognition for security in web applications can use AI services for processing. To store data, you can use SQL Azure, which involves exposing an API to access information from the face recognition service. You need to connect with Azure SQL Database and handle any issues related to JNC charts or time functions. For example, you might photograph a person in front of a PC or laptop. This image can be processed using Azure face recognition services. The system compares the image against a repository in SQL Azure. Access can be granted to the application if there is a match with the stored data. If there's no match, the system will notify that the person is not an employee.