Abstract : At the digital age, it's not only scale of copy which changes, but also its strategic and cultural significance. The practice of copy-paste has to be re-examined first to distinguish plagiarism - supported by the availability of the resources and the effectiveness of the search engines - and techniques of collection and collage - vectors of a dynamics of cultural appropriation. The technical dimension of copy must then be replaced in the center of the digital performativity. From the various shapes of transitory copy, essential to the information flow, to the algorithmic duplication of data, which makes today the law on the Internet, it is the entire economy of publication which should be reconsidered. In this context, rather than a hardening of copyright, it is a defense of a public Internet we need, in order to dam up the logic of silos that big actors of the Web apply to the management of the cloud.