Abstract: A privacy-preserving, real-time method may estimate automatically an attribute of a user of a multimedia device, such as the user age range, during a multimedia interactive session. The attribute estimation may be done locally on the user device by combining and cross-training machine learning classifiers on at least two modalities such as voice, text, haptics, video, image, sound, or other media modalities originating from the user-generated content during the interactive session. The method may further employ a federated learning architecture so that the attribute estimation and cross-training updates of the machine learning classifiers happen without the need to share user's personal data or user-generated content beyond the local device, thus ensuring compliance with privacy regulations in particular for minors. Such a method also offers a considerable cost advantage over server-side implementations.

Abstract: A method for controlling access to a visual medium in a social network comprising user units connected to a social network site server associated to a database and a to a distorted visual medium server storing visual media posted by users of the social network. A visual medium is selected by a posting user on a user unit and made available to at least one entitled user of said social network. The posting user defines a list of entitled users to be entitled to access the visual medium, said list of entitled users comprising at least one identifier identifying at least one entitled user, said identifier being associated to a parameter defining an access level to the selected visual medium. The selected visual medium is uploaded to the distorted visual medium server in association with the list of entitled users.

Abstract: A method for controlling access to a visual medium in a social network comprising user units connected to a social network site server associated to a database and a to a distorted visual medium server storing visual media posted by users of the social network. A visual medium is selected by a posting user on a user unit and made available to at least one entitled user of said social network. The posting user defines a list of entitled users to be entitled to access the visual medium, said list of entitled users comprising at least one identifier identifying at least one entitled user, said identifier being associated to a parameter defining an access level to the selected visual medium. The selected visual medium is uploaded to the distorted visual medium server in association with the list of entitled users.