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Authentication of data transmitted in digital transmission system

A technology of data and equipment, which is applied in the field of data, equipment and systems sent by signature and authentication, and can solve problems such as return of trouble and money

Inactive Publication Date: 2006-09-20
INTERDIGITAL CE PATENT HLDG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Depending on the sensitivity of the public key, this may require the broadcaster to costly and laboriously return these decoders to the manufacturer for the new public key to be hardcoded into the memory of these decoders

Method used

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  • Authentication of data transmitted in digital transmission system
  • Authentication of data transmitted in digital transmission system
  • Authentication of data transmitted in digital transmission system

Examples

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Embodiment Construction

[0080] figure 1 An overview of the digital television system 1 according to the present invention is shown above. The present invention encompasses most conventional digital television systems 2 that use the known MPEG-2 compression system to transmit compressed digital signals. In more detail, an MPEG-2 compressor 3 at a broadcast center receives a digital signal stream (typically a video signal stream). Compressor 3 is connected to multiplexer and scrambler 4 via link 5 .

[0081] The multiplexer 4 receives a plurality of further input signals, combines the delivered data streams, and sends the compressed digital signal to the transmitter 6 of the broadcast center via a link 7, which may of course take various forms, Including telecommunications links. The transmitter sends an electromagnetic signal via an uplink 8 to a satellite transponder 9 where it is processed and broadcast via a notional downlink 10 to a ground receiver 12, traditionally via a own or leased dish an...

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PUM

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Abstract

A method of authenticating data transmitted in a digital transmission system, in which the method comprises the steps, prior to transmission, of determining at least two encrypted values for at least some of the data, each encrypted value being determined using a key of a respective encryption algorithm, and outputting said at least two encrypted values with said data.

Description

technical field [0001] The invention relates to an authentication method for data sent in a digital transmission system. Background technique [0002] Broadcast transmission of digital data is well known in the art of pay television systems in which scrambled audiovisual information is sent, usually via satellite or satellite / cable links, to a number of subscribers, each with a decoding device, capable of descrambling transmitted programs for later viewing. Terrestrial digital broadcasting systems are also known. The latest systems also use the broadcast link to send data other than audiovisual data (such as computer programs or interactive applications) to decoders or connected PCs. [0003] A particular problem with the transmission of application data is the need to verify the integrity and point of origin of any such data. Since this data can be used to reconfigure the decoder, and implement any number of interactive applications, it is important that the received dat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L9/32G06F21/00G06F21/10G06F21/60G06F21/62G06F21/64G09C1/00H04H20/00H04L9/08H04L29/06H04N5/00H04N7/167H04N7/24
CPCH04N21/2541H04N21/435H04N21/4405H04N21/2362H04L9/3268H04N21/2347H04N21/63345H04L9/0891H04L9/3247H04N7/1675H04L2209/601H04N21/235H04L63/12H04N21/26613H04N21/6433H04N21/835H04N21/6334
Inventor J·-B·G·M·伯奎P·普莱恩
Owner INTERDIGITAL CE PATENT HLDG
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