Method of local conditional access for mobile equipment
First Claim
1. A method for conditional access to a digital data stream encrypted with at least one control word and broadcast via a plurality of transmitters in a broadcast network to at least one mobile device in communication with a transmitter among the plurality of transmitters, said method comprising:
- receiving a control message stream by the mobile device, the control message stream comprising control words and access conditions, the access conditions including at least one location identifier;
receiving a current location identifier by the mobile device, the current location identifier being transmitted by and identifying the transmitter;
performing by the mobile device a comparison of the current location identifier with the location identifier contained in the access conditions; and
authorizing or blocking the access to said data stream by the mobile device depending on the result of said comparison;
wherein the control word comprises a key for decrypting the encrypted digital data stream, the control word being received in encrypted form; and
wherein the access conditions further comprise at least one entitlement description related to the broadcasted content and wherein the authorization or blocking of the access further depends on the presence of the at least one entitlement description.
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Accused Products
Abstract
A method for conditional access to a digital data stream encrypted with at least one control word and broadcasted to at least one mobile device, said transmitter also transmitting a control message stream containing control words and access conditions, said mobile device being connected to a mobile communication network via a mobile access point, comprises: receiving the control message stream by the mobile device; determining a location identifier for the said mobile device by either the identifier of the mobile access point or the identifier of the broadcasting network transmitter; verifying access conditions contained in the control message, said access conditions comprising a reception condition related to a mobile access point identifier and/or an identifier of one broadcasting network transmitter; comparing the determined identifier with the identifier(s) contained in the access conditions; and authorizing or blocking the access to said data stream depending on the result of the comparison.
29 Citations
19 Claims
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1. A method for conditional access to a digital data stream encrypted with at least one control word and broadcast via a plurality of transmitters in a broadcast network to at least one mobile device in communication with a transmitter among the plurality of transmitters, said method comprising:
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receiving a control message stream by the mobile device, the control message stream comprising control words and access conditions, the access conditions including at least one location identifier; receiving a current location identifier by the mobile device, the current location identifier being transmitted by and identifying the transmitter; performing by the mobile device a comparison of the current location identifier with the location identifier contained in the access conditions; and authorizing or blocking the access to said data stream by the mobile device depending on the result of said comparison; wherein the control word comprises a key for decrypting the encrypted digital data stream, the control word being received in encrypted form; and wherein the access conditions further comprise at least one entitlement description related to the broadcasted content and wherein the authorization or blocking of the access further depends on the presence of the at least one entitlement description. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A mobile device for providing conditional access to a digital data stream encrypted with at least one control word and broadcast via a plurality of transmitters in a broadcast network to at least one mobile device in communication with a transmitter among the plurality of transmitters, the mobile device comprising:
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a wireless receiver; and a security module; wherein the security module is configured to perform the steps of receiving a control message stream, the control message stream comprising control words and access conditions, the access conditions including at least one location identifier; receiving a current location identifier, the current location identifier being transmitted by and identifying the transmitter; performing a comparison of the current location identifier with the location identifier contained in the access conditions; and authorizing or blocking the access to said data stream depending on the result of said comparison; wherein the control word comprises a key for decrypting the encrypted digital data stream, the control word being received in encrypted form; and wherein the access conditions further comprise at least one entitlement description related to the broadcasted content and wherein the authorization or blocking of the access further depends on the presence of the at least one entitlement description. - View Dependent Claims (16, 17, 18, 19)
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Specification