Protection of data on media recording disks
5 Assignments
0 Petitions
Accused Products
Abstract
This invention discloses a secure recording medium having at least one of audio, video and software content, comprising a plurality of media recording disks (DVD'"'"'s) with a disk security chip embedded in each the DVD, each the disk chip comprising a security key, wherein at least two of the DVD'"'"'s have different disk security keys. A method for protecting access to content recorded on a media recording disk (DVD) is also disclosed.
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Citations
71 Claims
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1-51. -51. (canceled)
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52. A system for protecting access to content recorded on a media recording disk (DVD), the system comprising:
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a disk security chip on the DVD, the disk security chip managing access to the content of the DVD, the disk security chip comprising a disk key not known to a disk manufacturer; and
a corresponding player security chip in a DVD player, the DVD player being operative to play the DVD, the player security chip managing use of a data stream received from the DVD, the disk security chip being in wireless communication with the player security chip, wherein the disk security chip is operative to send the DVD player the disk key after assuring that the DVD player is authentic. - View Dependent Claims (53, 54, 55, 56, 57, 58)
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59. A system for protecting access to content recorded on a media recording disk (DVD), the system comprising:
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a disk security chip disposed on the DVD, the disk security chip managing access to the content of the DVD; and
a corresponding player security chip disposed in a DVD player, the DVD player being operative to play the DVD, the player security chip managing use of a data stream received from the DVD, the disk security chip being in wireless communication with the player security chip, wherein the disk security chip is operative to send the DVD player the disk key after assuring that the DVD player is authentic. - View Dependent Claims (60, 61, 62, 63, 64, 65)
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66. A system for protecting access to content recorded on a media recording disk (DVD), the system comprising:
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means for managing access to the content of the DVD, the means for managing access comprising a disk key not known to a disk manufacturer; and
corresponding player security means comprised in a DVD player, the DVD player being operative to play the DVD, the player security means managing use of a data stream received from the DVD, the means for managing access being in wireless communication with the player security means; and
wherein the means for managing access, after assuring that the DVD player is authentic, sends the DVD player the disk key.
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67. A system for protecting access to content recorded on a media recording disk (DVD), comprising:
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means for managing access to the content of the DVD; and
corresponding player security means comprised in a DVD player, the DVD player being operative to play the DVD, the player security chip means managing use of a data stream received from the DVD, the means for managing access being in wireless communication with the player security means, wherein the means for managing access, after assuring that the DVD player is authentic, sends the DVD player a disk key.
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68. A method for protecting access to content recorded on a media recording disk (DVD), the method comprising:
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providing a disk security chip on the DVD, the disk security chip managing access to the content of the DVD;
providing a corresponding player security chip in a DVD player which is operative to play the DVD, the player security chip managing use of a data stream received from the DVD, the disk security chip being in wireless communication with the player security chip;
providing the disk security chip with a disk key;
the player security chip sending a random number R to the disk security chip, the random number R being different each time the DVD is played;
the disk security chip sending the player security chip an encrypted concatenation of a hash function of R, called h(R), and the content key, encrypted with the disk key;
the player security chip decrypting the concatenation, and computing h(R) and comparing with the h(R) sent by the disk security chip;
the player security chip verifying R to be correct, thereby certifying that the disk chip really knows the player key;
the player security chip obtaining the content key from the concatenation; and
the player security chip using the content key to decrypt control words that are located within entitlement control messages (ECMs) in the DVD. - View Dependent Claims (69)
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70. A system for protecting access to content recorded on a media recording disk (DVD), the system comprising:
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a disk security chip on the DVD, the disk security chip managing access to the content of the DVD, the disk security chip comprising a disk key;
a corresponding player security chip in a DVD player which is operative to play the DVD, the player security chip managing use of a data stream received from the DVD, the disk security chip being in wireless communication with the player security chip, the player security chip being operative to produce a random number R for sending from the player security chip to the disk security chip, the random number R being different each time the DVD is played, wherein the disk security chip sends the player security chip an encrypted concatenation of a hash function of R, called h(R), and the content key, encrypted with the disk key, and the player security chip is operative to perform the following steps;
decrypt the concatenation, and compute h(R) and compare the computed h(R) with the h(R) sent by the disk security chip;
verify R to be correct, thereby certifying that the disk chip really knows the player key;
obtain the content key from the concatenation; and
use the content key to decrypt control words that are located within entitlement control messages (ECMs) in the DVD. - View Dependent Claims (71)
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Specification