KR20110005172A - Apparatus and method for capturing multimedia data along with identifiable information - Google Patents

Abstract

PURPOSE: A multimedia data generating device including identification information and a method thereof are provided to connect multimedia data and inherent identification information by cryptological feature and forgery prevention of multimedia data obtaining device. CONSTITUTION: A data interface(112) receives input of a multimedia data such as image and voice information. A forgery preventing identification information insertion unit(120) generates identification number, which is impossible for illegal change by a device identification number, time information and location information. The forgery preventing identification information inserting unit inserts the identification information to a multimedia data of a data interface unit. An external device transmitting unit(121) provides identification information-inserted data to an external device.

Description

Apparatus and method for capturing multimedia data along with identifiable information}

The present invention relates to an apparatus and method for generating multimedia data including identification information. More particularly, the present invention relates to an apparatus and method for generating multimedia data including identification information for inserting identification information to prevent illegal changes into multimedia data.

"The present invention is derived from a study performed as part of the IT original technology development project of the Ministry of Knowledge Economy [Task No. 2008-F-036-02, Title: Development of anonymity-based u-knowledge information protection technology]. "

In general, a camera is used as a device for generating an image signal. Such cameras are classified into a type of capturing a static video signal and a type of capturing a dynamic video signal. Cameras for capturing dynamic and static video signals have generally acquired and provided images.

A camera that acquires a dynamic image signal receives an image signal through a specific electronic device, such as a charge-coupled device (CCD), and generates a dynamic image and transmits it. Compressed and saved form. For example, CCTV (closed-circuit television), a kind of dynamic camera, is an abbreviation for closed-circuit television. Machine.

In general, a closed circuit surveillance system is a system for supplying an image signal photographed by a surveillance camera to a specific user through wire or wireless. These CCTV surveillance systems are installed at intersections of highways, local roads, or downtowns to monitor traffic conditions, or to be installed in general homes to protect the privacy of individuals. It is installed in a place where a lot of crime occurs to prevent the transmission of information to the user.

In addition, thanks to the rapid development of technology, cameras that acquire dynamic video signals are widely used in digital camcorders, digital cameras and mobile phones, and personal digital assistants (PDAs). Recently, the demand for small-scale security surveillance equipment using CCTV as well as professional security equipment such as security surveillance camera and digital video recorder (DVR) is increasing. The purpose of such a device is to provide the ability to remotely manage image information for a specific location and store it for later retrieval without the constraints of space or time that people cannot access. Therefore, it provides a net function of providing crime prevention effects and information effects as evidence in legal disputes. However, the image data recorded by such an image acquisition device has a problem that it is easy to change or corrupt the original data by a malicious attacker. In addition, it is very difficult to guarantee the reliability of specific image data because a new image can be easily made by forging the original recording device and time information of the recorded image. As such, there is an urgent need for a tool for connecting all the multimedia data including the image to the device at the time of collecting the data through the acquisition device, in particular, surrounding information such as time and location information in the data and keeping it secure.

Therefore, in the present invention, for the recording device for surveillance and evidence collection purposes such as CCTV, the device information, time and location information about the data collected when the device collects the multimedia data is inserted together and this information is malicious from the outside. An object of the present invention is to provide an apparatus and method for generating multimedia data including identification information for keeping it safe from attack.

An apparatus according to an embodiment of the present invention is an apparatus for generating multimedia data including identification information, comprising: a data interface for receiving multimedia data such as video or video and audio information acquired through a camera, a device identification number, time information, Anti-counterfeiting identification information insertion unit for generating identification information that cannot be changed illegally using the location information and inserting it into the multimedia data provided from the data interface unit, and an external device for providing the external device with data inserted with the anti-counterfeiting identification information. It includes a device transmitter.

Method according to an embodiment of the present invention, a method for generating multimedia data including identification information, the process of receiving multimedia data such as video or video and audio information obtained through the camera, device identification number, time information, And generating identification information that cannot be illegally changed using location information and inserting the identification information into the provided multimedia data, and providing the external device with the data into which the forgery prevention identification information is inserted.

According to the present invention, multimedia data generally distributed by connecting the multimedia data to be collected and the unique identification information inside the device by using anti-counterfeiting and cryptographic characteristics inside the multimedia data acquisition device and protecting it from external attacks, Ensure the reliability of records containing initial device identification and contextual information for the system.

DETAILED DESCRIPTION A detailed description of preferred embodiments of the present invention will now be described with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings. And in describing the present invention, if it is determined that the detailed description of the related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted. In addition, it is to be noted that each of the terms described below are only used to help the understanding of the present invention, and may be used in different terms despite the same purpose in each manufacturing company or research group.

1 is a block diagram of a multimedia data acquisition apparatus for inserting identification information to prevent illegal changes according to an embodiment of the present invention.

The multimedia data acquisition apparatus according to the present invention includes a camera input signal receiver 100, a multimedia data processing unit 110, and an external device 130.

The camera input signal receiver 100 receives audio information together with an image or an image in an analog or digital manner.

The multimedia data processing unit 110 inserts device information and situation information with respect to the multimedia data acquired through the camera input signal receiver 100 and transmits the data to the external device 130. The multimedia data processing unit 110 is located between the camera input signal receiver 100 and the external device 130, and adds identification information so that illegal changes are not made to data received from the camera input signal receiver 100. Distribute and transmit to device 130. Multimedia data processing unit 110 according to an embodiment of the present invention is basically implemented in one module form, but is not limited thereto.

Here, the 'identification information' refers to all information that can be utilized to recognize the data when the multimedia data is first generated from other data. This may include information such as the device number generating the data, the generation time and location. In addition, the meaning of 'illegal change' refers to any act that changes or destroys information originally generated from a device without a legal approval procedure. For example, the act of forgery and alteration with malicious intent on the original data is included in the illegal illegal change.

Accordingly, the configuration of the multimedia data processing unit 110 will be described in more detail with reference to FIG. 1. As shown in FIG. 1, the multimedia data processor 110 includes a data interface 112, a digital signal converter 114, an anti-counterfeiting identification information inserter 120, and an external device transmitter 121.

The data interface 112 provides audio information data to the digital signal changer 114 together with images or images acquired through various types of camera input signal receivers 100.

When the data received from the data interface 112 is in an analog form, the digital signal converter 114 converts the data into a digital form and transmits the digital signal to the anti-counterfeiting identification inserter 120. Meanwhile, when the camera input signal receiver 100 converts the input signal into a digital form by itself, the data received from the input signal receiver connection unit 112 is transferred to the anti-counterfeiting identification inserting unit 120 without conversion. do. The separation between analog and digital can be preset by the administrator or can be configured to detect an input signal inside the device to determine whether it is an analog or digital signal.

The anti-counterfeiting identification information inserting unit 120 internally generates identification information that cannot be illegally changed, and inserts the identification information into multimedia data initially acquired by the camera input signal receiver 100 based on the information. Detailed configuration and operation of the anti-counterfeiting identification information insertion unit 120 will be described in more detail with reference to FIG. 2. The data generated through the anti-counterfeiting identification information inserting unit 120 is transmitted to the external device 130 according to the manner in which the data is actually distributed through the external device transmitting unit 121.

The external device transmitter 121 includes a network transmitter 122, a storage device transmitter 124, and a display transmitter 126. The data is provided to at least one of a network connected to the network transmitter 122, a storage device connected to the storage device transmitter 124, and a display unit connected to the display transmitter 126.

First, when the finally generated data is sent to the remote place using the network, the data received from the anti-counterfeiting identification information insertion unit 120 is transmitted to the external device 130 through the network transmission unit 122. The storage device transmitter 124 provides an interface for storing the data generated by the anti-counterfeiting identification information inserter 120 in the storage device. The display transmitter 126 provides an interface for viewing the generated data in real time through the display device. The three transmitters should be able to ensure physical connectivity according to the medium of each external device.

2 illustrates a structure of an anti-counterfeiting identification information insertion unit that is a component of a multimedia data processing unit according to an exemplary embodiment of the present invention.

As illustrated in FIG. 2, the anti-counterfeiting identification information inserting unit 120 includes a device-specific identification information generating module 231 and an identification information inserting module 232.

The device-specific identification information generating module 231 includes a device identification key 231a, a timer 231c, a location information measuring instrument 231d, and a crypto engine 231b.

The device identification key 231a generates device-specific identification information in a cryptographic manner, the timer 231c provides time information that cannot be arbitrarily manipulated, and the position information measuring instrument 231d provides a global positioning system. Provide location information of the device as shown. And a cryptographic engine 231b that provides cryptographic primitives.

Here, cryptographic primitives mean random number generator, data encryption and hash, and signature algorithm. Accordingly, information about when, where, and which device the multimedia data is generated may be generated through the device unique identification module 231. At this time, the device-specific identification module 231 includes both software and hardware that is implemented such that the generated identification information is impossible to randomly manipulate, illegally change, and illegally monitor from the outside.

As shown in FIG. 2, the identification information insertion module 232 transmits the anti-counterfeiting identification information p generated from the device-specific identification information generating module 231 through the camera input signal receiver 100 shown in FIG. 1. It inserts into the acquired first multimedia data (i). At this time, the method of inserting may use techniques such as watermarking and forensic marking, but is not limited thereto. Therefore, the multimedia data (o) into which the anti-counterfeiting identification information is inserted should be able to separately separate the multimedia data and the identification information in the later extraction step according to the insertion method used in the identification information insertion module.

3 is a diagram illustrating a process of generating anti-counterfeiting identification information using a device-specific identification information generation module according to an embodiment of the present invention.

3 is an anti-counterfeiting identification information using a device identification key 231a, an encryption engine 231b, a timer 231c, and a location information measuring instrument 231d in the device-specific identification information generation module 231 according to the present invention. p).

)를 암호학적 방법으로 생성한다. 320단계에서 타이머(331c)는 임의의 조작이 불가능한 시간 정보(

)를 제공한다. 330단계에서 정보 측정기(331d)는 카메라의 위치 정보(

)를 제공한다. 카메라의 위치 정보는 위치 확인 시스템(Global Positioning System)을 이용하여 위치 정보를 받을 수도 있으며, 실내와 같이 위치 확인 시스템을 사용하지 못하는 상황에서는 관리자에 의해 미리 설정된 위치 정보를 사용할 수도 있다.In operation 310, the device identification key 231a may use device-specific identification information (

) Is generated by the cryptographic method. In step 320, the timer 331c stores time information that cannot be arbitrarily manipulated.

). In step 330, the information measuring unit 331d uses the camera's location information (

). The position information of the camera may receive position information using a global positioning system, or may use position information preset by an administrator in a situation in which the positioning system cannot be used such as indoors.

Step 310 Step 320 Step 330 may be performed in parallel at the same time, which may be prioritized.

), 현재 시간(

) 및 위치 정보(

)를 입력으로 하여 현재 생성되고 있는 멀티미디어 데이터에 대한 장치 고유의 식별 정보(

)를 생성한다. 이후에 장치에 대한 합법적인 접근이 가능한 사용자에게, 생성된 식별정보로부터 반대로 장치 식별 키, 시간 및 위치 정보의 값에 대한 진위 여부를 판단해 줄 수 있는 암호학적 연산이 제공되어야 한다. 예를 들어, 장치 식별 키(231a)를 공개키 형태로 제공하는 경우, 하기 <수학식 1>과 같은 서명 기법을 이용하여 식별정보를 생성할 수 있으나, 이에 한정되는 것은 아니다.In operation 340, the encryption engine 231b uses a device identification key (

), current time(

) And location information (

As input, device-specific identification information for the multimedia data currently being generated (

) Afterwards, a user who has legitimate access to the device should be provided with a cryptographic operation that can determine the authenticity of the value of the device identification key, time, and location information from the generated identification information. For example, when the device identification key 231a is provided in the form of a public key, identification information may be generated using a signature scheme as shown in Equation 1, but is not limited thereto.

4 is a flowchart illustrating a process of acquiring multimedia data in which identification information for preventing illegal changes is inserted according to an embodiment of the present invention.

In step 400, the camera input signal receiver 100 receives data such as video and audio collected from a multimedia data acquisition device such as a CCTV and an audio recording device.

In operation 410, the multimedia data interface 112 receives multimedia data acquired through the camera input signal receiver 100.

In step 420, the digital signal converter 114 checks whether the data format received from the multimedia data interface 112 is a digital method. In the case of analog, the process proceeds to step 425 and the digital signal converter 114 converts the digital method. If the input signal is in a digital form, it bypasses and proceeds to step 430. The reason for digital conversion is that transmission, storage and real time playback are easy.

In step 430, the anti-counterfeiting identification information inserting unit 120 generates device-specific identification information using a device identification key 231a in a cryptographic manner, and provides time information that cannot be arbitrarily manipulated by the timer 231c. do. It also provides location information using location information measurer 231d and cryptographic primitives using cryptographic engine 231b. Therefore, forgery prevention identification information p such as a device number, time, and position information at the time of data acquisition can be generated internally. The generated anti-counterfeiting identification information is inserted into the multimedia data converted into the digital form in step 420.

In operation 440, the data generated through the anti-counterfeiting identification information inserting unit 120 is actually distributed through the external device transmitting unit 121. The network transmitting unit 122, the storage device transmitting unit 124, and the display transmitting unit 126 are used. Is passed to.

The network transmitter 122 is interfaced when sent to a remote place using a network, the storage device transmitter 124 provides an interface for storing in a storage device, and the display transmitter 126 is an interface for viewing in real time through the display device. To provide.

In step 450, the external device transmitter 121 transmits the multimedia data in which the identification information is inserted to the external device 130 according to a distribution method suitable for each medium.

As described above, the multimedia data acquisition apparatus and method for inserting identification information to prevent illegal change according to the present invention have been described with reference to the illustrated drawings, but the present invention is not limited to the embodiments and drawings disclosed herein. The technology can be applied within the scope of protection.

1 is a block diagram of a multimedia data acquisition apparatus for inserting identification information to prevent illegal changes according to an embodiment of the present invention;

2 is a structural description of a forgery preventing identification information insertion unit which is a component of a multimedia data processing unit according to an embodiment of the present invention;

3 is a diagram illustrating a process of generating anti-counterfeiting identification information using a device-specific identification information generation module according to an embodiment of the present invention;

4 is a flowchart illustrating a process of acquiring multimedia data in which identification information for preventing illegal changes is inserted according to an embodiment of the present invention.

Claims (15)

In the multimedia data generating device comprising identification information, A data interface for receiving multimedia data such as video or video and audio information acquired through a camera; An anti-counterfeiting identification information insertion unit which generates identification information which cannot be changed illegally by using device identification number, time information, and location information, and inserts the identification information into the multimedia data provided from the data interface unit; And an external device transmitter configured to provide the external device with the data inserted with the anti-counterfeiting identification information. The method of claim 1, wherein the multimedia generating device, Further comprising a digital signal converter for converting an analog signal into a digital signal, The data interface provides the multimedia data to the digital signal converter, The digital signal converter converts the multimedia data into a digital signal when the multimedia data is an analog signal and outputs the identification information insertion unit for preventing forgery, and outputs the identification information insertion unit for anti-counterfeiting without processing in the case of a digital signal. Multimedia data acquisition device including identification information. The anti-counterfeiting identification information inserting unit according to claim 1 or 2, A device-specific identification information generation module for generating identification information which cannot be illegally changed by using the location of the multimedia generating device, the input time information of the input multimedia information, and the unique information of the multimedia generating device; And an identification information insertion module for inserting identification information generated by the device-specific identification information generation module into data received by the camera. The method of claim 3, wherein the device-specific identification information generating module, A device identification key for generating device-specific identification information; A timer that provides time information, A location information measuring device for providing location information of the multimedia generating device; And a cryptographic engine for providing cryptographic primitives. The device identification key of claim 4, wherein Apparatus for obtaining multimedia data comprising identification information using a signature scheme in the form of a public key. The method of claim 4, wherein the cryptographic primitive is And a random number generator, a data encryption technique, a hash technique, and a signature technique. The method of claim 1, wherein the external device transmitter, And a network transmitter for providing the generated data to a remote place through a network. The method of claim 1, wherein the external device transmitter, And a storage device transmitting unit for storing in the storage device. The method of claim 1, wherein the external device transmitter, And a display transmitting unit for viewing in real time through the display device. In the data processing method of the multimedia generating device for processing the multimedia data input from the camera, Receiving multimedia data such as video or video and audio information acquired through a camera; Generating identification information that cannot be illegally changed using device identification numbers, time information, and location information, and inserting the identification information into the provided multimedia data; And providing the external device with the data inserted with the anti-counterfeiting identification information. The method of claim 10, wherein the multimedia generation process comprises: Converting the multimedia data into a digital signal when the multimedia data is an analog signal; And outputting identification information without processing if the multimedia data is a digital signal. According to claim 10 or 11, The process of inserting the anti-counterfeiting identification information, Generating identification information that cannot be illegally changed by using the location of the multimedia generating device, input time information of the multimedia information input, and unique information of the multimedia generating device; And inserting the generated identification information into the data received by the camera. The process of claim 12, wherein the generating of the identification information that is not illegally changed is possible. Generating identification information unique to the multimedia generating device; To provide time information, Providing location information of the multimedia generating device; And a method of providing cryptographic primitives. The method of claim 13, wherein the generating of the device-specific identification information comprises: Multimedia data acquisition method comprising the identification information, characterized in that using a signature scheme in the form of a public key. The method of claim 13, wherein the providing of the cryptographic primitive comprises using a random number generator or an algorithm of a data encryption technique, a hash technique, or a signature technique.

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