| 摘要 |
<p>In a method for preventing unwanted use of encoded digital data (D1, D2; D1' D2'), provision is made for authorization-to-use information (BBI1, BBI2; BBI1', BBI2') to be made available to a data-sink device (3), which authorization-to-use information (BBI1, BBI2; BBI1', BBI2') is made available separately from the digital data (Dl, D2; Dl' D2'), is intended for authorizing use of the digital data (D1, D2; Dl' D2') by the data-sink device (3) and comprises at least the blocking information (BL1, BL2; BL1', BL2') for blocking further availability of the digital data (D1, D2; D1' D2') plus decoding information (DC1, DC2; DC1' DC2'), which decoding information (DC1, DC2; DC1' DC2') is associated with the digital data (D1, D2; D1' D2'), is intended for decoding the digital data (D1, D2; D1' D2') and is available to the data-source device (4) before the authorization-to-use information (BBI1, BBI2; BBI1', BBI2') is made available to the data-sink device (3), and in which method a withdrawal of the availability of the decoding information (DC1, DC2; DC1' DC2') to the data-source device (4) also takes place.</p> |
