A method for registering a first electronic entity of a user, which is capable of generating event data. The method includes: after a first main service platform dedicated to the first electronic entity receives a first registration request coming from a user terminal and including a user identifier for identifying/authenticating the user by a secondary service platform, the secondary service platform receives a second registration request including the user identifier from the first main service platform. Upon positive identification/authentication of the user by the secondary service platform, the first electronic entity is registered in a database of the secondary service platform, in association with an account of the user. Once the secondary service platform receives event data from the first electronic entity, the event data is made available to the second main service platform.