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Method and system for determining locality using network signatures

A content and receiver technology, applied in transmission systems, digital transmission systems, data exchange networks, etc.

Inactive Publication Date: 2007-09-05
TIME WARNER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] 1. Innocent co-location, such as reception by neighbors, or
[0011] 2. Eavesdropping, e.g. by an "uninvited guest" parking a vehicle within range of an unprotected wireless network

Method used

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  • Method and system for determining locality using network signatures
  • Method and system for determining locality using network signatures
  • Method and system for determining locality using network signatures

Examples

Experimental program
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Embodiment Construction

[0026] FIG. 1A shows a known system 10 in which a source 12 sends a PING signal to a potential receiver 14. The PING signal essentially asks "Can you hear this?". In response, the potential receiver generates a RETURN signal saying "this is what I heard". In other words, the PING signal has at least one data segment of bits ABCDEFG. The RETURN signal ideally includes the same data segment. Typically, the source 12 and the receiver 14 exchange messages on a distributed computer network through one or more intermediate nodes (not shown). Then, the parameter RTT1 is defined as the time between the time when the specific part of the specific part (for example, the valid bit G) is sent and the time when the same part is received by the source 12. Alternatively, the parameter RTT2 is defined as the distance between another part (for example bit C) or even two parts (bit C of PING and E of RETURN). Then, the parameter is related to the distance between the source 12 and the potential rec...

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PUM

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Abstract

Content is distributed from a source to a sink only if the sink is within a predetermined geographic locality. In one embodiment, a signature request is sent to the sink. The sink obtains an actual signature compares it to the requested signature, and if the requested signature and the actual signature resemble each other sufficiently closely, then the content is sent to the sink The signature is compiled from parameters obtained from appropriate parameter detectors. The parameter detectors generate, detect and monitor various signals required for determining the locality of the sink.

Description

Technical field [0001] The invention relates to a method and system for obtaining a signature according to several network parameters, and using the signature to determine whether a content receiver is within a predetermined geographic location. Background technique [0002] The basic problem solved by the present invention is that there is currently no guarantee (with a high degree of trust) that the content receiver device (such as a TV) is actually located in the home where the content owner wants it to distribute, copy, or replay the content from the content source. , Commercial or other geographically restricted areas. [0003] Related specific situations include the use of the Digital Transmission Content Protection (DTCP) (http: / / www.dtcp.com) protocol for copy protection via IEEE 1394, USB, MOST and Bluetooth networks. DTCP only "protects" (5C) the link between the source and the receiver; there is no built-in concept of short range between the source and the receiving de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/26H04K1/00H04L9/00
Inventor 斯潘塞·斯蒂芬斯肯尼斯·W·龙柯瑞格·D·卡特纳科纳·P·卡希尔
Owner TIME WARNER