Abstract (EN) Interactive digital artworks,by nature are among,the most,difficult to preserve. The InterPARES project, a multinational interdisciplinary collaboration, is studying many specific cases to understand,how,to preserve them,authentically. This essay first investigates the relation between the archival concept of authenticity, which involves the identity and integrity of the work, and
... [Show full abstract] performance authenticity, which is the main interest of most artists. It then examines two works for interactive performance, showing specifically how modeling and analysis can clarify what is needed to preserve their identity and integrity. Keywords (EN): authenticity, preservation, interactivity, art, music, performance,