초록 ▼

A device initialization method includes generating a license request for a personal media device. A timeout indicator may be obtained for a subscription associated with the personal media device. The license request and the timeout indicator may be combined to form a device license for the personal

A device initialization method includes generating a license request for a personal media device. A timeout indicator may be obtained for a subscription associated with the personal media device. The license request and the timeout indicator may be combined to form a device license for the personal media device. The device license may be digitally-signed to form a signed device license.

대표청구항 ▼

1. A method of transferring an encrypted media data file from a source electronic device to a target electronic device, the method comprising: receiving an indication from the source electronic device that an encrypted media data file is available for transfer to the target electronic device;providi

1. A method of transferring an encrypted media data file from a source electronic device to a target electronic device, the method comprising: receiving an indication from the source electronic device that an encrypted media data file is available for transfer to the target electronic device;providing to the source electronic device a target device license to indicate that the target electronic device has a valid subscription to a media distribution system from which the media data file was transferred to the source electronic device, wherein the target device license is unique to the target device and different from a source device license for the encrypted media data file;receiving the encrypted media data file from the source electronic device, the encrypted media data file being transferred from the source electronic device to the target electronic device responsive to the source electronic device providing an indication of having a valid subscription;storing the received encrypted media data file within a storage device of the target electronic device responsive to the target electronic device having a valid subscription;decrypting the encrypted media data file with the target electronic device to generate a decrypted media data file; andrendering the decrypted media data file with the target electronic device. 2. The method of claim 1, wherein the target device license is a valid device license for the encrypted media data file and includes a timeout indicator to provide an expiration date of the subscription to the media distribution system. 3. The method of claim 1, further comprising disabling the decrypting or preventing the rendering of the encrypted media data file responsive to expiration of the subscription to the media distribution system. 4. The method of claim 1, further comprising indicating that the target electronic device has an invalid subscription, which includes: indicating that the subscription is invalid after: an expiration of a predetermined time period; anda valid device license has not been provided to the target electronic device during the predetermined time period. 5. The method of claim 1, wherein the target device license is generated by the media distribution system and comprises a timeout indicator, a target device digital certificate, and an encrypted user encryption key. 6. The method of claim 5, wherein the target device license further comprises a licensing service digital certificate. 7. A non-transitory computer readable storage medium having a plurality of instructions stored thereon which, when executed by a processor, cause the processor to perform operations comprising: receiving indication from the source electronic device that an encrypted media data file is available for transfer to a target electronic device;providing to the source electronic device a target device license to indicate that the target electronic device has a valid subscription to a media distribution system from which the media data file was transferred to the source electronic device, wherein the target device license is unique to the target device and different from a source device license;receiving the encrypted media file from a source electronic device, the encrypted media data file being transferred from the source electronic device to the target electronic device responsive to the source electronic device providing an indication of having a valid subscription;storing the received encrypted media data file within a storage device of the target electronic device responsive to the target electronic device having a valid subscription;decrypting the encrypted media data file with the target electronic device to generate a decrypted media data file; andrendering the decrypted media data file with the target electronic device. 8. The method of claim 7, wherein the target device license is generated by the media distribution system and comprises a timeout indicator, a target device digital certificate, and an encrypted user encryption key. 9. The method of claim 8, wherein the target device license further comprises a licensing service digital certificate. 10. A method for transferring a media data file from a source electronic device to a target electronic device comprising: indicating that an encrypted media data file is available for transfer to the target electronic device;receiving an indication on the source electronic device to transfer the media data file to a target electronic device;receiving from the target electronic device an indication that the target electronic device has a valid subscription, the indication comprising a target device license that is unique to the target device and different from a device license of the source electronic device;transferring the media data file to the target electronic device in response to the indication to transfer the media data file and in response to the source electronic device providing an indication of having a valid subscription; andenabling a rendering of the media data file on the target electronic device responsive to the target electronic device having a valid subscription. 11. The method of claim 10 further comprising: indicating that the subscription is invalid after an expiration of a predetermined time period; anddisabling a decrypting or preventing the rendering of the encrypted media file responsive to the indicating that the subscription is invalid. 12. The method of claim 10 further comprising: verifying the integrity of the target electronic device license. 13. The method of claim 10 wherein the target electronic device license is digitally-signed by a licensing service. 14. The method of claim 10, wherein the target device license is generated by the media distribution system and comprises a timeout indicator, a target device digital certificate, and an encrypted user encryption key. 15. The method of claim 14, wherein the target device license further comprises a licensing service digital certificate.