Abstract: An intermediary server for providing secure access to a web page of a web-based service to a client terminal upon request of one of a web server and a client terminal and a related method, the client terminal having a web browser, the intermediary server including: an operating system configured to run an instance of a web browser engine; the web browser engine is configured to produce an image of the web page rendered in the instance of the web browser engine, and to transmit an access web page to the web browser of the client terminal; and the access web page is configured to retrieve the image from the web browser engine, and to display the image in the web browser.