| 摘要 |
<p>The invention relates to a method, a media player (10) and a portable storage medium (8) for allowing removal of measures provided on said portable storage medium for disturbing content, as well as a method, a server (36) and a computer program product for allowing removal of measures for disturbing content on a portable storage medium. The media player obtains an identifier (DID) of the medium and a media player identifier (PID), generates an intermediate encryption key (I_K) based on at least these identifiers and sends the intermediate encryption key to the server (36). The server then encrypts an unlocking key (U K) by using at least the intermediate encryption key, and sends the encrypted unlocking key ([U_K]E) to the player, which in turn decrypts the unlocking key by using at least the intermediate encryption key, such that the measures for disturbing the perception of content provided on the medium can be removed.</p> |
