Method and system for legally sharing copyright-protected digital contents

摘要

A method of legally sharing digital copyright-protected contents, comprising: at a first data processing apparatus (110) of a first user having a digital copyright-protected content available for sharing: at least partly encrypting the digital copyright-protected content in a first form that is not decryptable by the first user; and causing the digital copyright-protected content encrypted in the first form to be made available to a second user wishing to at least temporarily enjoying the digital copyright-protected content, without retaining the digital copyright-protected content in a form usable by the first user for enjoying it; at a second data processing apparatus (105) of the second user: receiving the digital copyright-protected content encrypted in a second form decryptable by the second user; decrypting the received encrypted digital copyright-protected content, and at least temporarily enjoying it; upon request of the second user or in any case upon expiry of a predetermined time, automatically causing the digital copyright-protected content to be no longer enjoyable by the second user, wherein after the digital copyright-protected content is no longer enjoyable by the second user, the capability of fruition of the digital copyright-protected content by the first user is automatically re-established.