| 摘要 |
<p>A system and method for protecting content is described, the system and method comprising a content item which has been segmented into at least two portions, each portion being encrypted according to a different encryption key, a single content rights license associated with the content item, the license including at least two encrypted decryption keys operative to decrypt at least one of the at least two portions, such that any two encrypted decryption keys of the at least two encrypted decryption keys includes a first key which is less securely encrypted than the second key, a plurality of decryption keys, each one of the decryption keys being able to decrypt at least one of the at least two encrypted decryption keys, a decryptor for decrypting the at least one of the at least two encrypted decryption keys, and a second decryptor for decrypting, with the at least one of the at least two encrypted decryption keys, at least one portion of the at least two portions of the content item.</p> |
