| 摘要 |
The present invention re-encrypts encrypted content on a Video-on Demand (VoD) system. A device on the VoD system, such as a server, obtains the encrypted version of the content on the VoD system and the key, the first key, that was used to encrypt that version. The server decrypts the encrypted content using that key, re-encrypts the decrypted content using a second key, and provides the re-encrypted content to the VoD system, which provides it to a user. The server then deletes from its files any other version of the content, including any unencrypted, decrypted and re-encrypted version, and all keys, including the first and second key. |
