KR20100007316A - Method for protecting charged contents in vod service - Google Patents

Abstract

The present invention relates to a method for protecting paid content of a VOD service. That is, in the present invention, when viewing VOD paid content in the IP-STB, program information such as a program ID for the corresponding paid content is fed back to the VOD server from the IP-STB, so that the paid content information and feedback originally provided by the VOD server are provided. By comparing the content information and determining whether to hack the communication signal on the IP-STB and the VOD server, it is possible to block illegal free download attempts for the VOD paid content.

Description

How to Protect Paid Content for Video Services {METHOD FOR PROTECTING CHARGED CONTENTS IN VOD SERVICE}

The present invention relates to an Internet-Protocol Set-Top-Box (IP-STB), and more particularly, to a program for charged contents between IP-STB and VOD when watching Video On Demand (VOD) paid content in IP STB. (program) A method for protecting paid contents of a VOD service to prevent illegal free download attempts for paid contents from a VOD server by allowing feedback to be shared through interactive communication. .

Recently, due to the development of computer and network communication, a large amount of multimedia information is encountered in various forms, and according to the convergence of communication and broadcasting, a multimedia service through a TV is required.

The subscriber has an IP-STB to receive multimedia services such as VOD provided by using the subscriber's IP network such as Digital Subscriber Line (xDSL) and Ethernet that enable high-speed Internet service.

The IP-STB refers to a device that provides information service, video content, and broadcasting to a TV through an IP network, that is, a high-speed Internet, and in the related art, media such as dramas and movies through the IP network. The service (media service) is implemented to use the service by receiving authentication through a separate authentication card using a smart card system installed in an IP set-top box.

On the other hand, most VOD services currently used are two-way services that the user sends a request to the VOD server. When a user requests a VOD for a movie, the IP-STB receives this information. After the VOD request signal is transmitted through the connection with the VOD server, the VOD server receiving the value transmits the various paid broadcasts requested.

However, in the conventional VOD service method as described above, when a user manipulates a communication system by hacking an IP-STB and a communication signal between the IP-STB and the VOD server or exchanges wrong information through hacking, that is, for example, For example, if a pay-TV program is requested by sending an incorrect request signal to watch a pay-TV for free, the VOD server provides a pay-TV but does not charge.

Therefore, in the present invention, when viewing VOD paid content in the IP STB, program information on the paid content between the IP-STB and the VOD is fed back through bidirectional communication, thereby preventing illegal free download attempts for the paid content from the VOD server. To protect the paid content of VOD services to provide.

The above-described present invention is a method of protecting paid content of a VOD service through bidirectional communication between an IP-STB and a VOD server, including downloading paid content from the VOD server at the IP-STB, and paying content at the IP-STB. Analyzing the program information and providing feedback to the VOD server; comparing program information of the paid content originally provided by the VOD server with the fed back program information; and when the comparison result does not match the program information. Stopping the download of the paid content at the VOD server.

In the present invention, when viewing the VOD paid content in the IP-STB, the program information such as the program ID for the paid content from the IP-STB is provided to the VOD server, the paid content information and feedback content information originally provided by the VOD server By determining whether the hacking of the communication signal on the IP-STB and the VOD server through the comparison, there is an advantage that can prevent illegal free download attempts for VOD paid content.

Hereinafter, with reference to the accompanying drawings will be described in detail the operating principle of the present invention. In the following description of the present invention, when it is determined that a detailed description of a known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. Terms to be described later are terms defined in consideration of functions in the present invention, and may be changed according to intentions or customs of users or operators. Therefore, the definition should be made based on the contents throughout the specification.

Looking at the core technical gist of the present invention, when watching VOD paid content in the IP-STB, program information such as program ID for the paid content from the IP-STB is provided to the VOD server to provide feedback to the VOD server. The purpose of the present invention is to provide a technique for blocking illegal free download attempts for paid VOD content by determining whether to hack a communication signal on the IP-STB and the VOD server by comparing the content information with the feedback content. Easy to achieve.

1 illustrates a detailed block configuration of an IP-STB to which an embodiment of the present invention is applied. The IP-STB 120 includes an interface unit 122, a memory unit 124, a controller 128, and a CAM module 130. ), The HDD 126, the A / V decoder 132, and the like.

Hereinafter, an operation of each component for protecting VOD paid content in the IP-STB 120 of the present invention will be described in detail with reference to FIG. 1.

First, the IP-STB 120 connects to the Video On Demand (VOD) server 100 through the Internet network 106 and services digital / analog terrestrial broadcast data serviced from the VOD server 100. And receiving free / free content such as various videos and displaying the same on the TV receiver 134.

The interface unit 116 is connected to the Internet and receives digital / analog terrestrial broadcasting and various VOD video contents serviced from the VOD server 100. The memory unit 124 stores an operation program of the IP-STB control unit 128, and temporarily stores data according to the operation of the control unit 128. The HDD (Had Disk Drive) 126 stores various video contents received by the IP-STB 120 under the control of the controller 128.

The A / V decoder 132 decodes video / audio signals of various free / free video contents received from the VOD server 100 and outputs them to the TV receiver 134 for display.

The Conditional Access System Module (CAM) module 130 is a portable module that stores software (S / W) for descrambling a program transmitted from the VOD server 100 and stores a conditional access source. Storage device. The smartcard 136 is a medium that acts as a key to solve the scrambled program, and when it is inserted into the CAM module 130, CW (Control Word) serves as a key to solve the scramble. Can be obtained.

The IP-STB controller 128 controls the overall operation of the IP-STB 120 according to an operation program stored in the memory unit 124. In addition, according to an embodiment of the present invention, the VOD server 100 requests the download of video / free content for a corresponding movie or broadcast program according to a request of an IP-STB user, and the paid content requested from the VOD server 100. When receiving the descrambled via a smart card (descramble), the program information such as the program ID of the descrambled content is fed back (feedback) to the VOD server 100, by the VOD server 100 Through the feedback program information of the paid content provided by the user to check whether the change in the program information has occurred, it is possible to determine whether or not hacking.

The VOD server 100 is equipped with digital / analog terrestrial broadcast data and various video / free contents, and provides a VOD service to the IP-STB 120 of IP that is authenticated through the Internet. In addition, as shown in FIG. 2, when the VOD server 100 receives the VOD service of the paid content from the IP-STB 120 (S20) and downloads the paid content (S22), the VOD server 100 executes the present invention. For example, after receiving program information such as the program ID of the paid content from the IP-STB 120 (S24), comparing the program information with the original content, and then changing the program information, the IP-STB 120 The user determines that the user has hacked a communication signal with the VOD server 100 and stops downloading of the pay content (S26), thereby blocking the illegal VOD service.

3 illustrates an operation control flow for protecting VOD paid content serviced between an IP-STB and a VOD server according to an exemplary embodiment of the present invention. Hereinafter, an embodiment of the present invention will be described in detail with reference to FIGS. 1 and 3.

First, when a user of the IP-STB 120 requests VOD paying content such as a specific terrestrial broadcasting drama or a movie from the VOD server 100, the control unit 128 of the IP-STB 120 performs this at step S300. In response to step S302, the VOD server 100 requests a download of the VOD pay content requested by the user.

Then, the VOD server 100 receives the VOD pay content download request from the IP-STB 120 installed in the home or office in step S304, and the VOD requested from the IP-STB 120 in step S306. The paid content is searched from a database, the corresponding VOD paid content found in step S308 is downloaded to the IP-STB 120, and the charged content provided for downloading is started in step S310. .

Accordingly, the control unit 128 of the IP-STB 120 receives the pay content downloaded from the VOD server 100 through the interface unit 122 and broadcasts the broadcast drama or the movie program of the pay content in step S312. Describing the data is performed, and the paid content descrambled through the A / V decoder 132 is reproduced on the TV receiver 134 in step S314.

On the other hand, there may be a hacking attempt to change the information of the paid content downloaded by the user of the IP-STB 120 to the free content information that is not charged in the VOD server 100 when providing the VOD service as described above, As described above, when the same hacking occurs, the VOD server 100 does not charge the paid content provided to the IP-STB 120.

Accordingly, the control unit 128 of the IP-STB 120 identifies a program ID for the paid content currently received and played by the IP-STB 120 at step S316 in order to prevent the user's attempt to hack as described above. Program information such as), and the program information of the paid content analyzed in step S318 is transmitted to the VOD server 100. In this case, the information about the paid content may include price information of the paid content program, in addition to the program ID information.

Then, the VOD server 100 compares the program ID information transmitted from the IP-STB 120 with the program ID information of the original paid content in step S320.

At this time, if the program ID information of the original paid content and the program ID information fed back from the IP-STB 120 match, the VOD server 100 returns to step S308 in step S322 and normally applies to the paid content. Continue downloading.

However, when the comparison result at step S320 does not match the program ID information of the original paid content and the program ID information fed back from the IP-STB 120, the VOD server 100 performs the step S324 at step S322. The program ID information is changed by the hacking of the user, and the downloading of the pay content is stopped, thereby preventing the hacking of the user.

As described above, in the present invention, when viewing VOD pay content in the IP-STB, program information such as a program ID for the pay content is provided from the IP-STB to the VOD server so that the pay content originally provided by the VOD server is provided. By comparing the information with the feedback content information, it is possible to block illegal free download attempts for VOD paid content by determining whether to hack a communication signal on the IP-STB and the VOD server.

Meanwhile, in the above description of the present invention, specific embodiments have been described, but various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the invention should be determined by the claims rather than by the described embodiments.

1 is a detailed block diagram of an IP-STB to which an embodiment of the present invention is applied;

2 is a conceptual diagram illustrating signal processing between an IP-STB and a VOD server according to an embodiment of the present invention;

3 is a flowchart illustrating a paid content protection processing flow of a VOD service using bidirectional communication between an IP-STB and a VOD server according to an exemplary embodiment of the present invention.

<Brief description of the major symbols in the drawings>

100: VOD server 120: IP-STB

122: interface unit 124: memory unit

126: HDD 128: control unit

130: CAM module 132: A / V decoder

134: TV receiver

Claims (3)

As a method of protecting paid contents of VOD service through bi-directional communication between IP-STB and VOD server, Downloading the paid content from the VOD server in the IP-STB; Analyzing the program information of the paid content in the IP-STB and providing feedback to the VOD server; Comparing program information of the paid content originally provided by the VOD server with the feedback program information; Stopping downloading of the paid content in the VOD server when the program information does not match as a result of the comparison; Paid content protection method of the VOD service including. The method of claim 1, The paid content, Paid content protection method of the VOD service, characterized in that the video stream of the movie, broadcast drama. The method of claim 1, Program information of the paid content, The paid content protection method of the VOD service, characterized in that the ID (Identification) information of the program included in the paid content or the price information of the program.

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