A mobile phone of the type including a connection, able to allow the connection to a webpage with a particular URL, the connection to said webpage requiring the entry of a particular identifier specific to said webpage, a first storage able to store, in a database, the particular identifiers, each associated with a corresponding webpage.The mobile phone also includes a trigger able to systematically and automatically trigger, after the entry of a particular identifier, the implementation of a selector for choosing a primary identifier shared by all webpages requiring that a particular identifier be entered, if no primary identifier has been chosen yet, and a second storage able to store a security datum depending on the primary identifier after the entry of the primary identifier.