Controlling the downloading and recording of digital data
A method and apparatus for enabling a licensed end user to record digital data as described is particularly useful to the music industry as it enables them to make audio data available over the internet but to retain control of the uses to which that audio data can be put. Thus, upon completing a financial transaction to pay for the required audio tracks, the end user is enabled to download and decrypt encrypted music tracks and to play them on the end user's personal computer. The end user can also be allowed to burn a CD including the downloaded music tracks. However, the end user is only enabled to decrypt and record the music tracks onto the CD if the music tracks are recorded together with copy protection.
1. A method of enabling an end user to record digital data, the method comprising:
providing, at the request of the end user, encrypted digital data, the encrypted digital data having been encrypted by an encryption key generated by an end user computer;
storing the encrypted digital data with information identifying licensed rights;
allowing the end user to decrypt and record the digital data with copy protection onto a data carrier where the licensed rights include a right to record the digital data;
generating a request to obtain a key to enable recording of a decrypted digital data; and
upon use of the key by the end user to record the decrypted digital data onto the data carrier
verifying that the decrypted digital data is recorded together with the copy protection for the decrypted digital data to render a copy controlled disc, the copy protection including a digital signature and an authentication routine; and
licensing the end user upon completion of a financial transaction between the end user and a supplier of the digital data, to record the decrypted data, in a copy protected form, onto a number of data carriers, wherein the licensed end user is only enabled to record the decrypted data, in copy protected form, onto a single data carrier.
2. The method of claim 1 , wherein the copy protection for the decrypted digital data comprises a digital signature and a verification routine requiring access to the digital signature.
3. The method of claim 1 , further comprising licensing the end user upon completion of a financial transaction between the end user and a supplier of digital data to decrypt and record decrypted data, in copy protected form, onto a number of data carriers, wherein the copy protection comprises a digital signature and a verification routine requiring access to the digital signature.
4. The method of claim 1 , further comprising:
licensing the end user upon completion of a financial transaction between the end user and a supplier of digital data to decrypt and record the decrypted data, in copy protected form onto a number of data carriers, and
encoding inaccurate control data onto the data carrier, the control data which is inaccurate being usable by a reader of the digital data.
5. An apparatus for enabling an end user to record digital data, said apparatus comprising:
processing means arranged to receive digital data in encrypted form and to decrypt the received digital data, the encrypted digital data having been encrypted by an encryption key generated by an end user computer,
recording means for recording the decrypted digital data onto a data carrier, wherein the recording means records the decrypted digital data onto a data carrier together with copy protection for protecting the decrypted digital data against copying,
generating means for generating a request, wherein licensed rights include a right to record the decrypted digital data, the request to obtain a key to enable recording of the decrypted digital data, and
means for using the key to, enable the recording means to record the decrypted digital data but also to constrain the recording means only to record the decrypted digital data onto the data carrier together with copy protection for protecting the digital data against copying to render a copy controlled disc, the copy protection including a digital signature and authentication routine.
6. The apparatus of claim 5 , said apparatus further comprising a player for playing the decrypted digital data.
7. The apparatus of claim 5 , wherein said processing means is incorporated into an end user apparatus, and wherein said end user apparatus incorporates a media player able to play the decrypted digital data.
8. The apparatus of claim 7 , wherein the recording means is provided in a recording apparatus which also comprises decryption means for decrypting the digital data, the recording apparatus further comprising communication means arranged to receive external information enabled to control said decryption means.
9. The apparatus of claim 5 , wherein said apparatus comprises an end user computer incorporating said processing means and said recording means.
10. The apparatus of claim 5 , wherein the recording means is provided in a recording apparatus which also comprises decryption means for decrypting the digital data, the recording apparatus further comprising communication means arranged to receive external information enabled to control said decryption means.
11. The apparatus of claim 10 , wherein said recording apparatus further comprises copy protection means for encoding and recording copy protection information onto a data carrier.
12. A non-transitory computer readable medium having stored thereon instructions, wherein said instructions, when executed by a processor, cause said processor to record digital data onto a data carrier the instructions comprising:
an instruction to retain a first key which has been used to encrypt digital data, wherein the first key has been generated by an end user computer;
an instruction to request and receive a further key to enable recording of the digital data, an instruction to decrypt the digital data using the first key to generate decrypted digital data, and
an instruction to use the further key to record the decrypted digital data with an addition of copy protection for the digital data to render a copy controlled disc, the copy protection including a digital signature and authentication routine.
13. The computer readable medium of claim 12 , further comprising:
an instruction to access a catalogue for a database containing individual digital data files,
a second instruction to retain a respective first key for each digital data file selected, and
a third instruction to generate a request for a respective further key for each digital data file selected.
14. The computer readable medium of claim 13 , wherein the instruction to generate a request for a respective further key is executed upon the completion of a financial transaction between the end user and a controller of the database of digital data.
15. A non-transitory computer readable medium having stored thereon instructions, wherein said instructions, when executed by a processor, cause said processor to record digital data onto a data carrier the instructions comprising:
an instruction to retain a first key which has been used to encrypt digital data, wherein the first key has been generated by an end user computer;
an instruction to request and receive a further key to enable recording of the digital data,
an instruction to decrypt the digital data by using the first key, and
an instruction to use the further key received to cause recording of the decrypted digital data with the addition of copy protection for the digital data to render a copy controlled disc, the copy protection including a digital signature and authentication routine.