Method, apparatus and system for secure distribution of content
First Claim
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1. A method for secure distribution of content, comprising:
- decrypting content encrypted using a first key, the first key encrypted with a second key, with a locally stored copy of the second key and a received copy of the first key;
marking the decrypted content for identification purposes;
re-encrypting the marked content using the first key;
establishing a secure communications channel with at least one receiver for generating a unique session key with said at least one receiver;
encrypting the content intended for said at least one receiver using the unique session key; and
communicating the encrypted content encrypted using the unique session key to said at least one receiver;
wherein the communicated encrypted content is decrypted by said at least one receiver using a locally stored copy of the unique session key.
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Abstract
The invention provides a method, apparatus and system for the secure distribution of content such as audiovisual content in a way that prevents users from misusing the content and provides a mechanism for tracking pirated material back to the original location of misappropriation. A security device incorporates encryption methods to insure the broadcast encryption key remains secure. A marking device incorporates, for example, digital watermarking methods that attach to the content information to identify a location of origin of the misappropriation, such as a Set-top Box (STB) and/or smart card.
21 Citations
13 Claims
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1. A method for secure distribution of content, comprising:
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decrypting content encrypted using a first key, the first key encrypted with a second key, with a locally stored copy of the second key and a received copy of the first key; marking the decrypted content for identification purposes; re-encrypting the marked content using the first key; establishing a secure communications channel with at least one receiver for generating a unique session key with said at least one receiver; encrypting the content intended for said at least one receiver using the unique session key; and communicating the encrypted content encrypted using the unique session key to said at least one receiver; wherein the communicated encrypted content is decrypted by said at least one receiver using a locally stored copy of the unique session key. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. An apparatus for secure distribution of content, comprising:
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a secure processing module for encrypting and decrypting content; a smart card for locally storing and decrypting encryption keys; and a marking module for marking content; wherein upon receiving content encrypted with a first key and upon receiving the first key encrypted with a second key, the smart card of the apparatus decrypts the first key using a locally stored copy of the second key, the secure processing module decrypts the received encrypted content using the decrypted first key, the marking module marks the decrypted content for identification purposes and the secure processing module re-encrypts the marked content using the first key; and wherein the apparatus; establishes a secure communications channel with at least one receiver for generating a unique session key with said at least one receiver; encrypts content intended for said at least one receiver using the unique session key; and communicates the encrypted content encrypted using the unique session key to said at least one receiver; wherein the communicated encrypted content is decrypted by said at least one receiver using a locally stored copy of the unique session key. - View Dependent Claims (9, 10)
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11. A system for secure distribution of content, comprising:
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a content source for distributing content; an electronic counter-measure device for encrypting the distributed content using a first key and for encrypting the first key using a second key; an apparatus for receiving the content encrypted with a first key and the first key encrypted with a second key, the apparatus including; a secure processing module for encrypting and decrypting content; a smart card for locally storing and decrypting encryption keys; and a marking module for marking content; a storage device for storing the received encrypted content and the first key; wherein upon receiving content encrypted with the first key and upon receiving the first key encrypted with the second key, the smart card of the apparatus decrypts the first key using a locally stored copy of the second key, the secure processing decrypts the received encrypted content using the decrypted first key, the marking module marks the decrypted content for identification purposes and the secure processing module re-encrypts the marked content using the first key; and wherein the apparatus; establishes a secure communications channel with at least one content player for generating a unique session key with said at least one content player; encrypts content intended for said at least one content player using the unique session key; and communicates the encrypted content encrypted using the unique session key to said at least one content player; wherein the communicated encrypted content is decrypted by said at least one content player using a locally stored copy of the unique session key. - View Dependent Claims (12, 13)
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Specification