A method and a system for securing access to data stored in a remote content server (41), and corresponding to personal multimedia data of a user (A) for example, which data is accessible by another user (B) from a terminal (2) by means of an electronic address. In order to avoid direct and extended access by the user (B) to the data of a user (A), the system also includes an application server (5) for creating an electronic masking address having a determined validity period and for sending to an inverse proxy server (6) said electronic masking address assigned to the electronic address of the remote content server (41). In this way, the terminal (2) of the user (B) temporarily accesses data stored in the remote content server (41) via the inverse proxy server (6) by means of the electronic masking address.