| 摘要 |
<p>Some of these problems with digital information protection systems may be overcome by providing a mechanism (26) which allows a content provider to encrypt digital information without requiring either a hardware or platform manufacturer or a content consumer to provide support for the specific form of corresponding decryption. This mechanism can be provided in a manner which allows the digital information to be copied easily for back-up purposes and to be transferred easily for distribution, but which should not permit copying of the digital information in decrypted form. In particular, the encrypted digital information is stored (28) as an executable computer program which includes a decryption program that decrypts the encrypted information to provide the desired digital information (20), upon successful completion of an authorization procedure by the user.</p> |
