KR101206332B1 - Method and apparatus for securely multicasting contents between devices in networks - Google Patents

Abstract

The present invention relates to a method and apparatus for multicast streaming network-to-network content, and more particularly, to a method and apparatus for multicast streaming multicast streaming content data between general-purpose network devices located on different home networks connected to the Internet in a one- It is possible to simultaneously stream to multiple universal network media renderers located on different universal networks by using much less network resources compared with the conventional unicast streaming method among UPnP devices through the multicast streaming, There is an advantage in that security can be ensured with respect to content data transmitted between general-purpose network media devices located in other home networks.

Home-to-home multicast, home-to-home multicast control, home network, home-to-home multicast bridge, UPnP

Description

[0001] METHOD AND APPARATUS FOR SECURELY MULTICASTING CONTENTS [0002] BETWEEN DEVICES IN NETWORKS [

The present invention relates to a method and apparatus for securely multicasting streaming content between networks, and more particularly, to a method and apparatus for securely multicasting streaming content data between universal network devices located on different home networks connected to the Internet, And more particularly, to a method and apparatus for cast streaming.

The present invention has been derived from research carried out as part of the IT Growth Driving Technology Development Project of the Ministry of Knowledge Economy and the Korea Information Society Agency. [Assignment Number: 2006-S-068-03, Project Name: Peer-to-Peer Based Virtual Home Platform Technology Development Project].

A conventional Universal Plug and Play (UPnP) proxy method is a method for a user on the Internet to remotely discover and control UPnP devices at home through UPnP proxies installed in home gateways or home servers. This method provides unidirectional access and control from the home Internet to the home, but it can not provide bidirectional UPnP device discovery, control, and streaming service between UPnP A / V devices between heterogeneous UPnP networks that are physically separated, The UPnP media device located on another UPnP network can not multicast stream content securely at the same time.

As another example, a way to interconnect heterogeneous UPnP networks using the JXTA protocol has been devised. However, this method can transmit multimedia data between UPnP media devices based on the relay service, which is a core function of JXTA. However, by transmitting the content transmission between UPnP media devices in a multiple unicast manner, There is a problem that a transmission delay occurs due to the lack of network resources when the content is simultaneously streamed to a UPnP media device located on another UPnP network.

As another example, a multimedia streaming method using a virtual media server among UPnP-based home networks has been devised. However, this method has a disadvantage in that each home network must have a home connector, and that the connector is manually set up in order to connect the home network and the home network, and it is difficult to dynamically configure the home network according to the movement of the user. In addition, since the virtual media server relays the streaming data and collects the content information of each media server, the load is concentrated.

As another example, a method for providing mobility of UPnP devices based on the SIP protocol has been devised. However, this method has a disadvantage in that the UPnP device for supporting mobility must support the SIP (Session Initiation Protocol), so it needs to be redeveloped in order to be applied to the previously developed UPnP devices. On the other hand, And does not propose a method for multicast streaming content securely at the same time to a UPnP media device located therein.

SUMMARY OF THE INVENTION The present invention has been proposed in order to solve the above problems, and provides a method and apparatus for securely multicast streaming content data one-to-one or one-to-many among general-purpose network devices located on different home networks connected to the Internet .

An apparatus for multicast streaming network-to-network content according to a first aspect of the present invention is a device for searching for a general-purpose network device located on a plurality of home networks and downloading content data held by the general- A home-to-home multicast control device which can process the home-to-home multicast control device into a file block and a chunk file and transmit the home-only multicast control device in a one-to-one or one-to-many manner; A home-to-home multicast bridging device capable of streaming to the general-purpose network device; and a multicast service capable of relaying the control message and the content data to be transmitted between the home-to-home multicast control device and the home- Including relay device All.

The home-to-home multicast control apparatus includes a security management unit capable of managing an authentication key and an electronic signature for secure communication with the home-to-home multicast bridge apparatus; A connection management unit operable to perform state management and control of the general-purpose network device after establishing a connection with the multicast relay device; and a download manager configured to download the content data stored in the general- One-to-one or one-to-many transmission.

Wherein the security management unit includes an authentication key management unit for requesting connection to the home-to-home multicast bridge device and generating and managing a public key and a secret key as the authentication key required for transmitting encrypted data, To-home multicast bridging device, a digital signature generating processor for generating a digital signature of the home-to-home multicast bridging device in order to request a secure communication channel using the home-to-home multicast bridging device, And a connection processing unit for managing a public key of the home-to-home multicast bridge apparatus.

Wherein the connection management unit comprises: a connection processing unit capable of searching for and connecting to the multicast relay apparatus for connection with the home-to-home multicast bridge apparatus; And a device manager capable of searching for the general-purpose network device located on a home network other than the home network and managing the state and controlling the general-purpose network device.

Wherein the transmission management unit comprises: a download processing unit for downloading content data stored in the general-purpose network device being managed by the connection management unit; a chunk file processing unit for processing the content data received by the download processing unit and generating the chunk file And a chunk file distribution processor for transmitting the chunk file to the home-to-home multicast bridge device, respectively.

Wherein the chunk file creation processing unit generates the file block when receiving the data of a predetermined size while receiving the content data and separates the generated file block into the chunk files by the number of the home- do.

Wherein the home-to-home multicast bridge device comprises: a security manager for managing an authentication key and verifying an electronic signature for secure communication with the home-to-home multicast control device; A connection manager for managing information of the general-purpose network device located in a home network to which the multicast relay device belongs after establishing a connection with the multicast relay device; And a transmission management unit capable of streaming the content data to the general-purpose network device after receiving the content data or retransmitting the content data to a designated home-to-home multicast bridge device.

Wherein the security management unit comprises: an authentication key management unit which can generate and manage a public key and a secret key as the authentication key required for authentication message verification and transmission message encryption decryption from the home-to-home multicast control apparatus; To-home multicast control apparatus which is located in the same home network and which can exchange and manage the home-to-home multicast control apparatus; And an electronic signature verification processing unit for verifying the digital signature included in the message.

Wherein the connection management unit comprises: a connection processing unit for searching for the multicast relay apparatus and setting up a connection to search for the home-to-home multicast control apparatus; and a connection management unit for searching and controlling the general-purpose network apparatus located in the same home network, To the connected home-to-home multicast control device.

The transmission management unit includes a chunk file reception processing unit for receiving a chunk file transmitted from the home-to-home multicast control apparatus or another home-based multicast bridge apparatus and requesting stream data transmission and chunk file retransmission processing, A streaming data transmission unit for streaming the block file to the general-purpose network device at a destination after confirming that all the chunk files constituting the chunk file are received by the chunk file reception processing unit; And a chunk file retransmission processing unit for retransmitting the chunk file to the designated home-to-home multicast bridge apparatus if the file is a file transmitted from the to-go-round multicast control apparatus.

As a second aspect of the present invention, a multicast streaming method for inter-network content is a method for multicast streaming content data one-to-one or one-to-many between universal network devices located on different home networks, Searching for a general-purpose network device located on a plurality of home networks, downloading content data held by the general-purpose network device searched on a home network to which the device belongs, processing the data into a file block and a chunk file, Wherein the apparatus relays the control message and the content data transmitted from the home-to-home multicast control apparatus, and after the home-to-home multicast bridge apparatus receives the control message and the content data from the multicast relay apparatus, And a step of streaming a general-purpose network devices in the network.

The transmitting step may include: generating a public key and a secret key required for mutual authentication and message encryption with the home-to-home multicast bridge device; and exchanging the public key with the home-to-home multicast bridge device To-home multicast bridge device to send an authentication request message including an electronic signature to the home-to-home multicast bridge device using the secret key to request authentication, and when the authentication is completed, To-multicast control device; downloading the content data stored in the general-purpose network device on the home network to which the home-only multicast control device belongs; and downloading the downloaded content data to the file block and the chunk file Processing the processed chunk file; Comprises the step of transmitting chunks of the file transfer message to the home tuhom Chapter multicast bridge device.

The processing step may include generating the file block and separating the generated file block into the chunk file by the number of the home-to-home multicast bridges to receive the file block when receiving the data of a predetermined size while receiving the content data .

The processing step encrypts the chunk file using the public key exchanged in the exchanging step.

The chunk file transfer message includes at least one of a chunk identification number, a block identification number, a file block size, a chunk file size, a total number of chunk files included in a block, a chunk transmission start time, And chunk file data.

The multicast streaming method comprises the steps of: after transmitting the chunk files included in one file block to the home-to-home multicast bridging device, transmitting the next file block to the home network until the entire file blocks constituting the entire content file are transmitted To-end multicast bridge device.

Wherein the streaming comprises: generating a public key and a secret key required for mutual authentication and message encryption with the home-to-home multicast control device; exchanging the public key with the home-to-home multicast control device; , After completing verification of an authentication request message including an electronic signature received from the home-to-home multicast control device, transmits to the home-to-home multicast control device, which has requested the connection, information about the universal network device Receiving a chunk file transmission message from the home-to-home multicast control device or another home-based multicast bridge device through the secure communication channel, and transmitting the chunk file And all of the blocks constituting the file block Groups combine the received file chunk when the chunk file is received, and a step of reassembling the original file blocks and of the step of streaming a general-purpose network devices assigned to a file the blocks reassembly.

Wherein the reassembling step retransmits messages received from the home-to-home multicast control apparatus among the received chunk file transmission messages to the specified home-to-home multicast bridge apparatus.

The reassembling step decrypts the chunk file encrypted using the secret key.

The multicast streaming method continuously transmits the next file block to the general purpose network device until all the file blocks constituting the entire content file are transmitted after transmitting one file block to the general purpose network device.

According to the present invention, content data can be safely transmitted in one-to-one or one-to-many secure multicast streaming between general-purpose network devices located on different home networks connected to the Internet.

For example, even if the user moves from his or her home to a neighbor, a relative, or a friend's house, the home UPnP network and another home UPnP network, which are moved without a separate passive setting process, and another UPnP network, To simultaneously multicast stream content from a UPnP media server at home to multiple UPnP media renderers at the home of a neighbor, relative, and friend, and the UPnP media server Can be played back simultaneously in UPnP media renderers at home or at the home of a neighbor, a relative, and a friend.

As described above, according to the present invention, multicast streaming enables streaming simultaneously to multiple universal network media renderers located on different universal networks by using much less network resources compared to the conventional unicast streaming method between UPnP devices, There is an advantage that security can be ensured with respect to content data transmitted between general-purpose network media devices located in different home networks.

Hereinafter, some embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

FIG. 1 is a configuration diagram of a network system employing an apparatus for multicast streaming network-to-network content according to an embodiment of the present invention.

1, an apparatus for multicast streaming inter-network content includes a home-to-home multicast control apparatus 100, home-to-home multicast bridge apparatuses 200-1, 200-2, and 200-3, Device 300 and the like.

The apparatus for multicast streaming the inter-network content according to the present invention is connected to different home networks (hereinafter, referred to as " home network ") connected to the Internet 500 through internet routers 400-1, 400-2, 700-1, 700-2, 700-3) located on the first, second, third, fourth, fifth, sixth, seventh, eighth, Universal network devices 700-1, 700-2 and 700-3 are connected to UPnP media renderers 710-1, 710-2 and 710-3 and UPnP media servers 720-1, 720-2 and 720 -3) can be arranged.

The home-to-home multicast control apparatus 100 searches the general-purpose network devices 700-1, 700-2, and 700-3 located on the plurality of home networks 600-1, 600-2, and 600-3, The multimedia content data held by the UPnP media server 720-1 among the general purpose network devices 700-1 searched on the home network 600-1 to which the multimedia network device 700-1 belongs are downloaded and processed into file blocks and chunk files, 300 to the home-to-home multicast bridge devices 200-1, 200-2, and 200-3 one-to-one or one-to-many.

The multicast relay apparatus 300 relays control message and multimedia content data transmitted between the home-to-home multicast control apparatus 100 and the home-to-home multicast bridge apparatuses 200-1, 200-2, and 200-3 send.

The home-to-home multicast bridge apparatuses 200-1, 200-2, and 200-3 receive the control message and the multimedia content data transmitted from the home-to-home multicast control apparatus 100, 710-2, and 710-3 among the general purpose network devices 700-1, 700-2, and 700-3 located on the UPnP media renderers 710-1, 710-2, and 710-3.

2 is a detailed block diagram of a home-to-home multicast control apparatus included in an apparatus for multicast streaming inter-network content according to an embodiment of the present invention.

2, the home-to-home multicast control apparatus 100 includes a security management unit 110, a connection management unit 120, a transmission management unit 130, and the like.

The security manager 110 manages authentication keys and digital signatures for secure communication with the home-to-home multicast bridge devices 200-1, 200-2, and 200-3.

The security manager 110 requests a connection to the home-to-home multicast bridge devices 200-1, 200-2, and 200-3 and generates a public key and a secret key as authentication keys required for transmitting encrypted data And generates a digital signature of its own to request a secure communication channel to the home-to-home multicast bridge devices 200-1, 200-2, and 200-3 using a secret key. To-home multicast bridge device 200-1 (200-1, 200-2, 200-3) that exchanges a public key with the home-to-home multicast bridge devices 200-1, 200-2, , 200-2, and 200-3), and the like.

The connection management unit 120 establishes connection with the multicast relay apparatus 300 located on the Internet 500 for connection to the home-to-home multicast bridge apparatuses 200-1, 200-2, and 200-3, Status management and control can be performed on the network devices 700-1, 700-2, and 700-3.

The connection management unit 120 includes a connection processing unit 121 for searching the multicast relay apparatus 300 for establishing a connection with the home-to-home multicast bridge apparatuses 200-1, 200-2 and 200-3, 600-3, 600-3 and 600-3 on the home network 600-1 in the state where the connection with the home-to-home multicast bridge apparatuses 200-1, 200-2 and 200-3 is established, And a device management unit 123 that can search for the general purpose network devices 700-1, 700-2, and 700-3 located on the network and manage status and control.

The transmission management unit 130 downloads the multimedia content data stored in the UPnP media servers 720-1, 720-2, and 720-3 among the general purpose network devices 700-1, 700-2, and 700-3, One-to-one or one-to-many transmission to the multicast bridge devices 200-1, 200-2, and 200-3.

This transmission management unit 130 stores the UPnP media servers 720-1, 720-2, and 720-3 among the general purpose network devices 700-1, 700-2, and 700-3 managed by the connection management unit 120 A download processing unit 131 for downloading the multimedia content data, a chunk file creation processing unit 133 for processing the multimedia content data received by the download processing unit 131 to generate a file block and a chunk file, And a chunk file distribution processor 135 for transferring the data to the cast bridges 200-1, 200-2, and 200-3, respectively.

3 is a detailed block diagram of a home-to-home multicast bridge device included in an apparatus for multicast streaming inter-network content according to an embodiment of the present invention.

3, the home-to-home multicast bridge apparatuses 200-1, 200-2, and 200-3 include a security management unit 210, a connection management unit 220, a transmission management unit 230, and the like.

The security management unit 210 can manage the authentication key and verify the digital signature for secure communication with the home-to-home multicast control device 100. [

The security management unit 210 includes an authentication key management unit 211 for generating and managing a public key and a secret key as authentication keys required for authentication message verification and transmission message encryption decryption from the home-based multicast control device 100, A connection processing unit 213 for exchanging and managing the public key with the home-based multicast control apparatus 100 located in the same home network 600-1; An electronic signature verification processing unit 215 that can verify the digital signature included in the authentication request message of the home-to-home multicast control device 100 using a public key, and the like.

After the connection management unit 220 establishes a connection with the multicast relay apparatus 300 for connection with the home-based multicast control apparatus 100, the connection management unit 220 transmits the multicast data to the home network 600-1, 600-2, And can manage the information of the general-purpose network devices 700-1, 700-2, and 700-3.

The connection management unit 220 includes a connection processing unit 221 for searching the multicast relay apparatus 300 and setting up a connection to search for the home-based multicast control apparatus 100, a general-purpose network apparatus To-home multicast control apparatus 100 by searching and controlling the general-purpose network apparatuses 700-1, 700-2, and 700-3 to transmit information of the general-purpose network apparatuses 700-1, 700-2, and 700-3 to the connected home- A management unit 223, and the like.

The transmission management unit 230 receives the multimedia content data from the home-based multicast control apparatus 100 or other home-to-home multicast bridge apparatuses 200-1, 200-2, and 200-3, and then transmits the multimedia content data to the general- 1, 700-2, and 700-3 to the UPnP media renderers 710-1, 710-2, and 710-3 or to the designated home-to-home multicast bridge devices 200-1, 200-2, and 200-3 ). ≪ / RTI >

The transmission management unit 230 receives a chunk file transmitted by the home-based multicast control apparatus 100 or other home-based multicast bridge apparatuses 200-1, 200-2, and 200-3, A chunk file reception processing section 231 for requesting chunk file retransmission processing and a chunk file reception processing section 231 for confirming whether all the chunk files constituting one block file have been received by the chunk file reception processing section 231, And a chunk file received by the chunk file reception processing unit 231 is a file transferred from the home-based multicast control apparatus 100 A chunk file retransmission processing unit 235 for retransmitting a chunk file to the designated home-to-home multicast bridge apparatuses 200-1, 200-2, and 200-3, and the like.

4 to 6 are flowcharts for explaining a multicast streaming method of inter-network content according to an embodiment of the present invention. FIG. 4 is a flowchart illustrating an overall execution process. FIG. 5 is a flowchart illustrating an execution process And FIG. 6 is a flowchart illustrating an operation performed by the home-to-home multicast bridge apparatus.

The present invention according to the embodiments of FIGS. 4 to 6 is a method for multicast streaming content data one-to-one or one-to-many among general-purpose network devices located on different home networks.

In the present invention, the home-to-home multicast control apparatus searches for a general-purpose network device located on a plurality of home networks, downloads content data held by the general-purpose network device found on the home network to which it belongs, processes the data into file blocks and chunk files A step S810 of relaying a control message and content data transmitted from the home-to-home multicast control apparatus to the multicast relay apparatus in operation S820; And streaming the content data to a general purpose network device located on the same home network after receiving the content data (S830).

The steps performed by the home-to-home multicast control apparatus 100 and the step S810 executed by the home-based multicast bridge apparatuses 200-1, 200-2 and 200-3 will be described below with reference to Figs. 1 to 6 S830 will be described in detail.

First, the authentication key management unit 111 of the home-to-home multicast control apparatus 100 transmits authentication keys to the home-to-home multicast bridge apparatuses 200-1, 200-2, and 200-3, And generates a public key and a secret key (S811).

The connection processing unit 115 exchanges public keys with the home-to-home multicast bridge apparatuses 200-1, 200-2, and 200-3 (S812).

The digital signature generation processing unit 113 generates a digital signature using a secret key for use in requesting a secure communication channel to the home-to-home multicast bridge apparatuses 200-1, 200-2, and 200-3.

The connection processing unit 121 transmits an authentication request message including a digital signature to the home-to-home multicast bridge apparatuses 200-1, 200-2, 200-3 for connection with the home-to-home multicast bridge apparatuses 200-1, 200-2, -2, 200-3) to request authentication.

When the authentication is completed, the device management unit 123 searches the home network 600-1 and the general network devices 700-1, 700-2, and 700-3 located on the other home networks 600-2 and 600-3, 3, that is, information on the general-purpose network devices 700-1, 700-2, and 700-3 retrieved by the home-to-home multicast bridge devices 200-1, 200-2, and 200-3 (S813).

The download processing unit 131 downloads the multimedia content data stored in the UPnP media server 720-1 from among the general purpose network devices 700-1 on the home network 600-1 to which the home-based multicast control apparatus 100 belongs And temporarily stores it (S814).

When receiving the data of a predetermined size while receiving the multimedia content data, the chunk file generation processor 133 generates a file block and transmits the generated block to the home-to-home multicast bridge devices 200-1 and 200-2 , 200-3) are divided into chunk files and processed. At this time, the chunk file is encrypted using the public key exchanged with the home-to-home multicast bridge devices 200-1, 200-2, and 200-3 (S815).

The chunk file distribution processing unit 135 transmits a chunk file transmission message including the processed chunk file to the home-to-home multicast bridge apparatuses 200-1, 200-2, and 200-3. At this time, the transmitted chunk file transmission message includes a chunk identification number, a block identification number, a file block size, a chunk file size, the total number of chunk files included in the block, a chunk transmission start time, a list of the home- , And chunk file data (S816).

After transmitting the chunk files included in one file block to the home-to-home multicast bridging devices 200-1, 200-2, and 200-3, until all the file blocks constituting the entire content file are transmitted To the home-to-home multicast bridge devices 200-1, 200-2, and 200-3. That is, steps S814 to S816 are repeated.

Next, the authentication key management unit 211 of the home-to-home multicast bridge apparatuses 200-1, 200-2, and 200-3 transmits an authentication key to the home-only multicast control apparatus 100, A public key and a secret key are generated (S831).

The connection processing unit 213 exchanges the public key with the home-to-home multicast control apparatus 100 (S832).

The digital signature verification processing unit 215 completes the verification of the authentication request message including the digital signature received from the home-

When the verification is completed, the connection processing unit 221 searches the multicast relay apparatus 300 to establish a connection to search for the home-to-home multicast control apparatus 100, and the device management unit 223 transmits the home- 700-2, and 700-3 located on the home networks 600-1, 600-2, and 600-3 to which the control apparatus 100 belongs, And creates a secure communication channel (S833).

The chunk file reception processing unit 231 receives chunk file transmission messages from the home-based multicast control apparatus 100 or other home-based multicast bridge apparatuses 200-1, 200-2, and 200-3 through a secure communication channel And stores the chunk file included in the message. Here, the chunk file retransmission processing unit 235 transmits the received chunk file transmission messages to the home-to-home multicast bridge apparatuses 200-1, 200-2, and 200- 3) (S834). When receiving all the chunk files constituting the file block, the chunk file reception processing unit 231 combines the received chunk files and reassembles them into the original file block, and decrypts the chunk file encrypted using the secret key ( S835).

The streaming data transfer unit 233 transfers the file blocks reassembled by the chunk file reception processing unit 231 to the UPnP media renderers 710-1 and 710-2 among the designated general purpose network devices 700-1, 700-2, and 700-3. 2, and 710-3 through streaming (S836).

After transmitting one file block to the general-purpose network devices 700-1, 700-2, and 700-3, the next file block is transmitted to the general-purpose network devices 700-1 through 700-3 until all the file blocks constituting the entire content file are transmitted. 1, 700-2, and 700-3. That is, steps S834 to S836 are repeatedly performed.

The multicast streaming method of inter-network content according to the present invention can be created by a computer program. The code and code segments that make up this computer program can be easily deduced by a computer programmer in the field. In addition, the computer program is stored in a computer readable medium, readable and executed by a computer, thereby implementing a method of multicast streaming content between networks. The information storage medium includes a magnetic recording medium, an optical recording medium, and a carrier wave medium.

The present invention has been described with reference to some embodiments thereof. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the present invention is defined by the appended claims rather than by the foregoing description, and all differences within the scope of equivalents thereof should be construed as being included in the present invention.

1 is a configuration diagram of a network system employing an apparatus for multicast streaming network-to-network content according to an embodiment of the present invention;

FIG. 2 is a detailed block diagram of a home-to-home multicast control apparatus included in an apparatus for multicast streaming inter-network content according to an embodiment of the present invention;

FIG. 3 is a detailed block diagram of a home-to-home multicast bridge apparatus included in an apparatus for multicast streaming inter-network content according to an embodiment of the present invention;

4 to 6 are flowcharts for explaining a multicast streaming method of inter-network content according to an embodiment of the present invention. FIG. 4 is a flowchart illustrating an overall execution process. FIG. 5 is a flowchart illustrating an execution process And FIG. 6 is a flowchart illustrating an operation performed by the home-to-home multicast bridge apparatus.

Description of the Related Art

100: Home-to-home multicast control device

110: security management unit 111: authentication key management unit

113: digital signature generation processing unit 115:

120: connection management unit 121: connection processing unit

123:

130: transmission management unit 131: download processing unit

133: chunk file creation processing unit 135: chunk file distribution processing unit

200-1, 200-2, 200-3: Home-to-Home Multicast Bridge Device

210: security management unit 211: authentication key management unit

213: connection processing unit 215: digital signature verification processing unit

220: connection management unit 221: connection processing unit

223:

230: transmission management unit 231: chunk file reception processing unit

233: streaming data transmission unit 235: chunk file retransmission processing unit

300: Multicast relay device

Claims (20)

A general-purpose network device located on a plurality of home networks is searched, content data held by the general-purpose network device searched on the home network to which the slave device is searched, and then processed into file blocks and chunk files, A multicast control device, A home-to-home multicast bridge device capable of receiving a control message transmitted from the home-to-home multicast control device and the content data and then streaming the multicast message to a general-purpose network device located on a home network; A multicast relay apparatus capable of relaying the control message and the content data transmitted between the home-to-home multicast control apparatus and the home-to-home multicast bridge apparatus, And multicast streaming the inter-network content. The method according to claim 1, Wherein the home-to-home multicast control device comprises: A security manager for managing an authentication key and an electronic signature for secure communication with the home-to-home multicast bridge device; A connection management unit configured to perform state management and control with respect to the general-purpose network device after establishing a connection with the multicast relay device for connection with the home-to-home multicast bridge device; And a transmission manager for downloading the content data stored in the general-purpose network device and transmitting the content data to the home-to-home multicast bridge device one-to-one or one-to- And multicast streaming the inter-network content. 3. The method of claim 2, The security management unit, An authentication key management unit for requesting a connection to the home-to-home multicast bridge apparatus and generating and managing a public key and a secret key as the authentication key necessary for performing encrypted data transmission; An electronic signature generation unit operable to generate a digital signature of the home-to-home multicast bridge device to request a secure communication channel using the secret key; And a connection processing unit for managing the public key of the home-to-home multicast bridge apparatus, which exchanges the public key with the home-to-home multicast bridge apparatus, And multicast streaming the inter-network content. 3. The method of claim 2, The connection management unit, A connection processing unit for searching the multicast relay apparatus for establishing a connection with the home-to-home multicast bridge apparatus, A device management unit that can search for the general-purpose network device located on a home network other than the home network on which the home-network multicast bridge apparatus is connected, And multicast streaming the inter-network content. 3. The method of claim 2, The transmission management unit, A download processing unit for downloading the content data stored in the general purpose network apparatus being managed by the connection management unit; A chunk file generation processing unit for processing the content data received by the download processing unit and generating the file block and the chunk file; And a chunk file distribution processor for transmitting the chunk files to the home- And multicast streaming the inter-network content. 6. The method of claim 5, Wherein the chunk file creation processing unit generates the file block when receiving the data of a predetermined size while receiving the content data and separates the generated file block into the chunk files by the number of the home- doing An apparatus for multicast streaming content between networks. The method according to claim 1, Wherein the home-to-home multicast bridge device comprises: A security manager for managing an authentication key and verifying an electronic signature for secure communication with the home-to-home multicast control device; A connection management unit configured to manage information of the universal network device located in a home network to which the multicast relay apparatus belongs after establishing a connection with the multicast relay apparatus for connection with the home- To-multi-cast bridging device, or to a general-purpose network device after receiving the content data from the home-to-home multicast control device or another home-to-home multicast bridging device, And multicast streaming the inter-network content. 8. The method of claim 7, The security management unit, An authentication key management unit for generating and managing a public key and a secret key as the authentication key required for authentication message verification and transmission message encryption decryption from the home- A connection processing unit which can exchange and manage the public key with the home-to-home multicast control apparatus located in the same home network, To-home multicast control apparatus, an electronic signature verification processing unit which verifies the digital signature included in the authentication request message of the home-to-home multicast control apparatus using the public key exchanged with the home- And multicast streaming the inter-network content. 8. The method of claim 7, The connection management unit, A connection processing unit for searching the multicast relay apparatus for establishing a connection to search for the home-to-home multicast control apparatus, To-home multicast control apparatus that searches and controls the general-purpose network apparatus located in the same home network and transmits information of the general-purpose network apparatus to the connected home- And multicast streaming the inter-network content. 8. The method of claim 7, The transmission management unit, A chunk file reception processor for receiving a chunk file transmitted by the home-to-home multicast control device or other home-to-home multicast bridge devices and requesting stream data transmission and chunk file retransmission processing; A streaming data transfer unit for streaming the block file to the general purpose network device at the destination after confirming that all the chunk files constituting one block file have been received by the chunk file reception processing unit; If the chunk file received by the chunk file reception processing unit is a file transferred from the home-to-home multicast control apparatus, a chunk file retransmission processing unit for retransmitting the chunk file to the designated home- And multicast streaming the inter-network content. A method for multicast streaming content data one-to-one or one-to-many between universal network devices located on different home networks, The home-to-home multicast control apparatus searches for a general-purpose network apparatus located on a plurality of home networks, downloads the content data held by the general-purpose network apparatus searched on the home network to which it belongs, processes the data into a file block and a chunk file, Step, The multicast relay apparatus relaying the control message and the content data transmitted from the home-to-home multicast control apparatus, After the home-to-home multicast bridge device receives the control message and the content data from the multicast relay device, streaming the multicast relay device to a general-purpose network device located on the same home network Gt; multicast < / RTI > 12. The method of claim 11, Wherein the transmitting comprises: Generating a public key and a secret key necessary for mutual authentication and message encryption with the home-to-home multicast bridge device; Exchanging the public key with the home-to-home multicast bridge device; And transmits the authentication request message including the digital signature to the home-to-home multicast bridge device using the secret key to request authentication. When authentication is completed, the home-to-home multicast bridge device transmits information about the universal network device Receiving, Downloading the content data stored in the general-purpose network device on the home network to which the home-only multicast control device belongs; Processing the downloaded content data into the file block and the chunk file; And transmitting a chunk file transmission message including the processed chunk file to the home-to-home multicast bridge device Gt; multicast < / RTI > 13. The method of claim 12, The processing step comprises: When receiving the data of a predetermined size while receiving the content data, the file block is generated and the generated file block is divided into the chunk files by the number of the home-to-home multicast bridges to be received A method for multicast streaming content between networks. The method according to claim 12 or 13, Wherein the processing step encrypts the chunk file using the public key exchanged in the exchanging step A method for multicast streaming content between networks. 13. The method of claim 12, The chunk file transfer message includes at least one of a chunk identification number, a block identification number, a file block size, a chunk file size, a total number of chunk files included in a block, a chunk transmission start time, And at least one of chunk file data A method for multicast streaming content between networks. 13. The method of claim 12, The multicast streaming method comprises the steps of: after transmitting the chunk files included in one file block to the home-to-home multicast bridging device, transmitting the next file block to the home network until the entire file blocks constituting the entire content file are transmitted To-end multicast bridge device A method for multicast streaming content between networks. 12. The method of claim 11, Wherein the streaming comprises: Generating a public key and a secret key necessary for mutual authentication and message encryption with the home-to-home multicast control device; Exchanging the public key with the home-to-home multicast control device; After completing verification of the authentication request message including the digital signature received from the home-to-home multicast control device, transmits information about the universal network device located on the home network to which the home- Transmitting and mutually creating a secure communication channel, Receiving a chunk file transmission message from the home-to-home multicast control device or another home-based multicast bridge device over the secure communication channel, storing the chunk file included in the message, storing all the chunk files Combining the received chunk files and reassembling them into an original file block when received, Streaming the reassembled file block to a designated general purpose network device Gt; multicast < / RTI > 18. The method of claim 17, Wherein the reassembling step includes retransmitting messages received from the home-to-home multicast control device among the received chunk file transmission messages to the designated home-based multicast bridge device A method for multicast streaming content between networks. The method according to claim 17 or 18, Wherein the reassembling step includes decrypting the chunk file encrypted using the secret key A method for multicast streaming content between networks. 18. The method of claim 17, The method of multicast streaming may further include transmitting one file block to the general purpose network device and then continuously transmitting the next file block to the general purpose network device until all file blocks constituting the entire content file are transmitted A method for multicast streaming content between networks.

Images