KR100556882B1 - A method and a apparatus of certification with authentication image signal for mobile phone - Google Patents

Abstract

The present invention is to prevent unauthorized copying and modulation to the portable terminal and to transmit a high-security and reliable image signal, taking an image and outputting it as a digital image signal, the input image signal is displayed as a visual image output display; A control unit which converts a video signal input from the video unit into a digital signal, removes noise, records and stores the output signal, and divides the video signal into a plurality of areas by a command signal; A storage unit which records and stores an image signal in a designated area; An encryption / decoding unit for watermarking the input video signal and converting the image signal into a graphic format; Authentication unit for the authentication process for the security of the video signal; Characterized in that the configuration consisting of a wireless unit for transmitting and receiving radio by converting the mobile communication unique method, and further comprising: an input process for removing noise of the video signal input by the portable terminal; The portable terminal of the input process analyzes the input video signal and divides the region by the input division value if the image signal is a complex video signal having a total distribution of importance, and divides the region by the basic division value if the image signal is not complicated. Classification process; A watermark process of dividing an area of an image message by an input division value and inserting watermark information by the portable terminal of the division process; The mobile terminal of the watermark process has a characteristic of converting an image message into a digital graphic format, and authenticating and transmitting the image message in a unique manner of mobile communication.

Description

TECHNICAL SIGNAL FOR MOBILE PHONE} Image signal security authentication device and method of mobile terminal {A METHOD AND A APPARATUS OF CERTIFICATION WITH AUTHENTICATION IMAGE SIGNAL FOR MOBILE PHONE}

1 is a functional diagram of a video message transmission system using a conventional fax;

2 is a functional configuration diagram of a general video message transmission mobile communication system;

3 is a functional configuration diagram of a video signal security authentication device of a mobile terminal according to the present invention;

4 is a flow chart of a video signal security authentication method of a mobile terminal according to the present invention;

Fig. 5 is an explanatory diagram of watermark information embedding state in a region-divided video signal of the present invention.

** Explanation of symbols on the main parts of the drawing **

100: portable terminal 110: video unit 112: video input unit

114: image output unit 120: control unit 130: storage unit

140: encryption and decryption unit 142: encryption and decryption module 144: watermarking module

150: authentication unit 160: wireless unit

The present invention transmits a document or the like as a video signal using a multimedia portable terminal, and in particular, inserts watermark information for each area to prevent unauthorized copying and tampering, and to secure the quality and security of the transmitted document by security authentication. The present invention relates to a video signal security authentication apparatus and method using a portable terminal to increase the reliability.

Mobile terminal (MS: MOBILE STATION) is a mobile communication device that has the advantages of owning and moving while communicating within the service area of a registered mobile communication system, at any time and anywhere, by wireless connection with the other party. to be.

The mobile communication equipment as described above has been developed from a communication method using only a voice level signal to a data level communication method using a letter and a symbol, and is now developing into a multimedia communication method including a video signal.

The multimedia communication method of the mobile terminal is to convert the video signal of the object photographed by the recording function unit provided integrally to a digital signal and to transmit it through a wireless communication path. In the case of FAX, the video signal is converted into an analog state. Communication equipment that transmits through wired communication path.

The video signal transmitted as described above is information itself, and it is necessary to develop a technology to prevent an unauthorized person from illegally acquiring or using such a video signal.

Hereinafter, a conventional video message transmission method will be described with reference to the accompanying drawings.

Attached to explain the prior art, Figure 1 is a functional configuration of a video message transmission system using a conventional fax, Figure 2 is a functional configuration of a typical video message transmission mobile communication system.

Referring to FIG. 1, a conventional video message transmission system using a fax includes: a fax (FAX) 10 for inputting image information and converting the image information into an electric signal; An EXCHANGER 20 which connects to the FAX 10 and analyzes and switches the call connection request signal so as to set a communication path; And a public network 30 connected to the switching center 20 to provide a communication path connected to the other switching center 20.

According to the prior art of the configuration as described above, and described in detail with reference to Figure 1 attached to the video message transmission system using a fax, the fax 10 is embedded in a document or photograph or various drawings and graphics, etc. The video signal is converted into a video signal or a video message through a video input device, and transmitted to a switching station 20 connected through a wired line together with a dialing signal for calling the other party.

The switching center 20 analyzes the call connection request signal of the fax 10 and establishes a communication path by switching. When the communication counterpart is subscribed to the switching station 20, the switching path switches to connect the communication path, In the case of subscribing to another switching center 20, the corresponding communication path is established through the public network.

In the conventional fax 10 as described above, due to the property of connecting through a wired communication network and transmitting a video message, it is not easy for another person to easily access the communication path, and thus, relatively secure maintenance is advantageous.

However, since the video message is transmitted as an analog signal, it is weak to noise and has a problem of outputting to a limited paper type at the receiving party.

In addition, the performance of the apparatus for inputting / outputting video signals, the limitations of the fax protocol, and the sharpness of the video signals transmitted due to the communication line conditions are difficult to read, and the unauthorized distribution of the video messages by unauthorized persons There is a problem such as not limiting.

Hereinafter, a general video message transmission mobile communication system will be described with reference to FIG. 2.

A mobile terminal (MS) 40 for freely moving the mobile communication service area and performing multimedia communication by wirelessly connecting with the other party anytime and anywhere; A base station (BS) 50 for wirelessly connecting to the portable terminal to transmit and receive communication signals and to form a service area; A mobile switching station (MSC: MOBILE SWITCHING CENTER) 60, which connects to the base station 50, inputs, analyzes, and switches a call connection request signal, thereby establishing a communication path and controlling and monitoring the operation of the entire mobile communication system; And a public network 30 which connects to the mobile switching center 60 and establishes a communication path for connection with other communication networks.

Hereinafter, a conventional video message transmission mobile communication system having the above configuration will be described in detail with reference to the accompanying drawings.

The mobile terminal 40 is capable of multimedia communication, photographs an object or document, converts it into a digital video signal, and transmits the same video signal to a wirelessly connected base station 50, and the base station 50 The wirelessly received signal is transmitted to the mobile switching center 60, and the mobile switching center 60 analyzes and switches the input call connection request signal, thereby establishing a communication path with the other party and accessing the set communication path. The other party receives the video message.

In the mobile communication system as described above, a plurality of portable terminals 40 simultaneously occupy limited radio resources and communicate with each other. There are a code division multiple access (CDMA) scheme and a GSM scheme. The method is selected by applying its own security authentication method and transmits the video message only to the authenticated counterpart.

In addition, the counterpart mobile terminal 40 may output the received video message signal through a corresponding display unit, output in a data state, or output a printed state on paper through a printer.

However, the video message transmission method of the mobile terminal according to the prior art as described above, there is a problem that the video message itself is not secured by authenticating the other party by security by the communication method of the system.

In addition, when the security by the communication method of the mobile communication system is wirelessly hacked, there is a problem that other people unfairly steal the video message and prevent or block unauthorized distribution of the stolen video message.

In the present invention, when transmitting a video signal using a multimedia portable terminal, the video signal to be transmitted is divided and watermarked, and transmitted to the other party authenticated by the TLS method. It is an object of the present invention to provide a video signal security authentication apparatus and method for a portable terminal that prevents unauthorized copying, modulation, and distribution.

The present invention has been made in order to achieve the above object, an image unit for capturing the image and outputting the digital image signal, the input image signal is output to display the visible image; A control unit which converts the video signal inputted from the video unit into a digital signal, removes noise, records, stores and outputs the video signal, and divides the video signal into a plurality of areas by a command signal; A storage unit which records and stores an image signal in a designated area under control of the controller; An encryption / decoding unit connected to the control unit and converting the input image signal into a graphic format by watermarking it; An authentication unit connected to the encryption / decryption unit and configured to perform authentication processing for security of an image signal; It is characterized in that the configuration consisting of a wireless unit connected to the authentication unit and converted to a unique method of mobile communication for wireless transmission and reception.

In addition, the present invention devised to achieve the above object, the input process for removing noise of the video signal input by the mobile terminal; The portable terminal of the input process analyzes the input video signal and divides the region by the input division value if the image signal is a complex video signal having a total distribution of importance, and divides the region by the basic division value if the image signal is not complicated. Classification process; A watermark process of dividing an area of an image message by an input division value and inserting watermark information by the portable terminal of the division process; The mobile terminal of the watermark process has a characteristic of converting an image message into a digital graphic format, and authenticating and transmitting the image message in a unique manner of mobile communication.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Hereinafter, an apparatus and a method for authenticating a video signal security of a portable terminal will be described with reference to the accompanying drawings.

It is attached to explain the present invention, Figure 3 is a functional block diagram of the video signal security authentication device of the portable terminal according to the present invention, Figure 4 is a flow chart of the video signal security authentication method of the mobile terminal according to the present invention, Figure 5 Is a state explanatory diagram for inserting watermark information into a region-divided video signal in the present invention.

Referring to FIG. 3, the video signal security authentication apparatus of the mobile terminal 100 according to the present invention captures an image and outputs it as a digital image signal, and the input image signal is output and displayed as a visual image. An image input unit 112 for capturing an image with a C-MOS image pickup device or a CCD image pickup device and outputting the image signal as an image signal; An image unit 110 including an image output unit 114 for displaying an input image signal as a visible image,

The video signal input from the video unit 110 is converted into a digital signal, the noise is removed, recorded, stored, and outputted, and the video signal input from the video input unit 112 is divided into a plurality of areas by the command signal. DIGITAL) signal, removes video noise, divides into multiple areas by the corresponding control command, and outputs the video signal input from the encryption / decoding unit 140 or read from the storage unit 130 to the video output unit. A control unit 120 for outputting to 114 and displaying it as a visual image signal;

A storage unit 130 for recording and storing an image signal in a designated area under control of the controller 120;

The image signal, which is connected to the control unit 120 and is input, is processed to a watermark and is converted into a graphic format, and the water is divided into a unit division area of the input image signal divided and input from the control unit 120. A watermarking module 144 for inserting a mark; An encryption / decryption module that encrypts an image signal applied from the watermarking module 144 in a digital graphic format and decrypts a digital graphic format applied from the authenticator 150. An encryption and decryption unit 140 consisting of 142;

Authentication process for the security of the video signal is connected to the encryption and decryption unit 140, and the other person who is not authorized and authenticated by the TLS (TRAPORT LAYER SECURITY) protocol (TL) (PROTOCOL) unfairly Authentication unit 150 to prevent the secured video signal,

The wireless communication unit 160 is connected to the authentication unit 150 and consists of a wireless unit 160 which performs a wireless transmission and reception by encrypting and converting in a unique manner of mobile communication.

Hereinafter, according to the present invention having the above-described configuration, the video input unit 112 constituting the video unit 110 of the mobile terminal (MS) 100 is a CMOS (C-MOS) or CD (CCD) imaging The device is configured to take an image of a subject through the image pickup device and output the electrical image signal to the controller 120.

The controller 120 converts a video signal applied from the video input unit 112 into a digital signal, removes a video noise, and outputs an M and N input from a user. Divide the value into numbers multiplied to divide it into multiple areas.

The reference for dividing and dividing the video signal into a plurality of areas is that since the video signal does not need to be divided when the video signal is composed of characters or the contents are relatively simple, the values of M (M) and yen (N) are determined. If each is assigned to 1, and each part of the video signal is important and can be divided and used, input M and N values to distinguish the corresponding parts.

The controller 120 stores the image signal input from the image input unit 112 in the storage unit 130 and outputs the image signal to the encryption / decoding unit 140.

The encryption / decoding unit 140 inserts a watermark for each of the divided regions by the watermarking module 144.

For example, referring to FIG. 5, when the video signal is composed of letters by the controller 120 and the importance is determined to be overall, the values of M and M are set to 1, respectively. In this way, the entire video signal is set to one important area, and one watermark is inserted by the watermarking module 144.

In addition, when the video signal has important information in each part, that is, when the video signal is divided into 12 important areas in total of 3 vertically 4 horizontally, M (M) and Since the value of the yen N is set to 4 and 3, respectively, the controller 120 divides the entire video signal into 12 areas evenly, and divides the entire video signal into 12 areas, respectively, by the watermarking module 144. Insert a watermark.

As described above, a video signal in which a watermark WATERMARK, which cannot be arbitrarily deleted or modulated by a third party, is inserted into each area by the watermarking module 144, by the encryption / decoding module 142. After the encryption operation is performed by the DIGITAL GRAPHIC FORMAT, it is output to the authentication unit 150.

The authentication unit 150 is secured by a TLS (TRANSPORT LAYER SECURITY) protocol (PROTOCOL) defined by the RFC2246 standard established by the IETF (INTERNET ENGINEERING TASK FORCE) organization Decryption process for authentication.

The TLS protocol uses a public key-secret key algorithm (ALGORITHM), and in the case of a certificate required when using the algorithm, a public certificate stored in a portable terminal for the purpose of M-COMMERCE or the like may be used. Instead of accredited certificates that require payment, you can create and issue your own temporary certificates that do not require payment of royalties depending on the characteristics of the other party.

The video signal secured by the authentication unit 150 as described above is applied to the wireless unit 160, the wireless unit 160 by the wireless coding and modulation method adopted and used in the mobile communication system, For example, a code division multiple access (CDMA) scheme, a time division multiple access (TDMA) scheme, or a GSM scheme (GSM) scheme may be encrypted at the transmitter side and decrypted at the receiver side.

When the video signal is received by the portable terminal, signal processing is performed in the opposite direction, that is, the wireless unit 160 decodes the signal wirelessly received by the mobile communication method, and the authentication unit 150. In the security authentication, the video signal is detected, and the detected video signal is decoded by the encryption / decryption module 142 of the encryption / decryption unit 140. The extracted video signal and the video signal decoded by the encryption / decoding unit 142 as described above are recorded and stored in the storage unit 130 through the control unit 120 with a Walkermark signal embedded therein. DB) is processed.

When the database DB of the storage unit 130 is searched under the control of the controller 120 and a necessary video signal is read, the data is output through the image output unit 114 of the image unit 110. Video signal is displayed.

That is, in the mobile communication system including the mobile terminal 100, a watermark is inserted into the digital graphic format by the encryption / decryption unit, and the watermark is inserted, encrypted by the authentication unit for TLS security authentication, and again by the wireless unit. By transmitting the video signal in the encrypted state by the unique modulation method of the mobile communication system to the other party, the other party receiving the video signal is decrypted by the wireless unit, TLS security authentication processing by the authentication unit and encryption and decryption unit Extracts a video signal in a digital graphic format.

Since the watermark information prevents others from making an illegal or illegal analysis and is relatively difficult to modify, the unauthorized person can prevent or track the illegal use of the video signal and claim the right of valuable video information. Will be.

In addition, the TLS processing used for the security authentication of the authenticator 150 prevents unauthorized persons from securing the video signal, and when the burden of the certificate cost used for the TLS processing becomes a problem, Generate and use.

Hereinafter, with reference to the accompanying FIG. 4, a video signal security authentication method of the mobile terminal 100 according to the present invention will be described.

Removing noise of the video signal input by the mobile communication multimedia terminal 100, and determining whether the video signal photographed from the video unit 110 is input (S100); An input process including a process of correcting image quality by removing image noise from an image signal input in the process S100;

The portable terminal of the input process analyzes the input video signal and divides the region by the input division value if the image signal is a complex video signal having a total distribution of importance, and divides the region by the basic division value if the image signal is not complicated. Determining whether the input video signal is a complex video signal in which important contents are distributed and distributed as a whole, or a simple video signal including a character (S120); If it is determined that the video signal input by the portable terminal of the determination process (S120) is a simple video signal that is made of text or is not of great importance, the M (M) and yen (N) values of the input video signal division are respectively 1. A first allocation process (S130) for allocating a; If it is determined that the important content is evenly distributed and distributed in the video signal input by the portable terminal of the determination process (S120), the M (M) and the N (N) values of the video signal division input from the user. The division process consisting of a second allocation process (S140) for assigning and outputting;

Comprising the division of the video message by the divided value input by the portable terminal of the classification process, and inserting the watermark information, arithmetic processing to multiply the M (M) and yen (N) value set in the classification process Dividing an area of the input video signal by a predetermined value (S150); A watermark process comprising inserting watermark (WATERMARK) information in each area divided in the process (S150) (S160);

Converting the input image signal into a digital graphic format by converting the image message into a digital graphic format by a mobile terminal of the watermark process and transmitting the image message in a digital communication format by secure authentication. ); The video signal of step S170 is secured by a TLS (TLS: TRANSPORT LAYER SECURITY) method, and is encrypted by a mobile communication method.

Hereinafter, according to the present invention having the configuration described above, the video signal security authentication method of the mobile terminal 100 will be described in detail with reference to the accompanying drawings.

When the multimedia terminal 100 inputs a video signal through the video unit 110 (S100), the video noise is removed by the control and monitoring of the control unit 120 (S110), the importance of the scattered state It is determined whether or not it is a distributed complex video signal or a simple video signal composed of characters or the like (S120).

When it is confirmed by the user as a complex video signal in the determination process (S120), the M and Y segment input values are respectively assigned by the user (S140), and the video signal photographed a document consisting of characters or not of importance If it is confirmed as a video signal, a value of 1 is allocated to the divided values of M and Y (S130).

The watermark is divided into regions according to the division values of M (M) and yen (N) input by the user (S150), and watermarks that are relatively difficult to analyze and modify in each of the divided regions as described above. Information is inserted (S160).

An example of the complex video signal described above is an area that is original, such as a large number of portraits or landscapes, and that has intellectual property value and intellectual property value even when partly used. Are to pre-divided to insert the watermark information in each.

Watermark information is inserted into each of the divided regions as described above, the inserted video signal is converted into a digital graphic format (S170), security authentication processing by the TS protocol, and a unique method of a mobile communication system. By wireless transmission in the encrypted state (S180).

In the wireless unit 160, wireless transmission in an encrypted state by a unique method of the mobile communication system may be performed by a unique communication method such as a code division multiple access method, a time division multiple access method, or a GSM method. In this case, since the security of the video signal itself is not performed, even when the signal transmitted by the wireless unit 160 is intercepted, the authentication unit 150 prevents unauthorized leakage of the video signal, which is intellectual property. Security authentication process.

Therefore, even if the video signal, which is an intellectual property, is not improperly distributed or reproduced, it is possible to secure a basis for claiming intellectual property rights by a watermark even if it is improperly distributed.

According to the present invention having the above-described configuration, since the encrypted and authenticated video signal is transmitted in a digital graphic format, there is an industrial use effect of restoring the received video signal without noise by others.

In addition, since watermark information is inserted into respective areas divided by importance, the video signal is prevented from being illegally copied and extracted by others, and in case of unauthorized copying, there is a convenient effect of claiming intellectual property rights.

In addition, since the authorized certificate is used in consideration of the status of the receiving side, there is a convenient effect of using a security certificate or using a self-certificate for security authentication without any additional cost.

Claims (11)

An image unit for taking an image and outputting it as a digital image signal, and inputting the image signal as a visual image; A control unit which converts the video signal inputted from the video unit into a digital signal, removes noise, records and stores the output signal, and divides the video signal into a plurality of areas by a command signal; A storage unit which records and stores an image signal in a designated area under control of the controller; An encryption / decoding unit connected to the control unit and converting the input image signal into a graphic format by watermarking; An authentication unit connected to the encryption / decryption unit and configured to perform authentication processing for security of an image signal; And a wireless unit which is connected to the authentication unit and converts into a unique method of mobile communication to wirelessly transmit and receive. The method of claim 1, wherein the video unit, An image input unit for photographing an input image with an image pickup device and outputting the image signal; An image signal security authentication device for a portable terminal, characterized by comprising a video output unit for displaying an input video signal as a visual image. The method of claim 2, wherein the image input unit, An image signal security authentication device for a portable terminal, characterized by comprising a CMOS image pickup device or a CSI image pickup device. The method of claim 1, wherein the control unit, Converts an image signal input from the image input unit into a digital signal, removes image noise, divides the image signal into multiple regions by a corresponding control command, and outputs an image signal input from the encryption / decoding unit or read from the storage unit to the image output unit. The video signal security authentication device of a mobile terminal, characterized in that the output consisting of a visible video signal configuration. The method of claim 1, wherein the encryption and decoding unit, A watermarking module for inserting a watermark in a unit division area of a video signal divided and inputted from the controller; And an encryption / decryption module for encrypting the video signal applied from the watermarking module into a digital graphic format and decoding the digital graphic format applied from the authentication unit. According to claim 1, The authentication unit prevents others from unlawfully securing the input video signal by TLS protocol, The wireless unit is a video message security authentication device of a mobile terminal, characterized in that the configuration by the wireless transmission and reception encrypted by a unique method of the mobile communication system. An input process for removing noise of a video signal input by a mobile terminal, The portable terminal of the input process analyzes the input video signal and divides the region by the input division value if the image signal is a complex video signal having a total distribution of importance, and divides the region by the basic division value if the image signal is not complicated. Division process, A watermark process of dividing an area of an image message by the input division value and inserting watermark information by the portable terminal of the division process; And an authentication process of converting the video message into a digital graphic format by the portable terminal of the watermark process, and authenticating and transmitting the image message in a unique manner of mobile communication. The method of claim 7, wherein the input process, Determining whether a video signal photographed from the video unit of the mobile terminal is input; The video message security authentication method of the mobile terminal, characterized in that the image quality is removed by correcting the image noise from the input image signal. The method of claim 7, wherein the classification process, A determination process of analyzing whether the input video signal is a complex video signal having a significant content or a simple video signal including a character by the portable terminal of the input process; A first allocation process of allocating 1s to M and Y values for dividing the input video signal when the input video signal is composed of characters or analyzed as simple contents by the portable terminal of the determination process; A second allocation for assigning M and Y values to input values for segmenting the video signal from the user when the portable terminal of the determination process analyzes the complex video signal in which important contents are evenly distributed throughout the input video signal; The video message security authentication method of a mobile terminal, characterized in that consisting of a process. The method of claim 7, wherein the watermark process, Dividing an area of the input video signal by an operation processing value that is multiplied by an M value and an Y value output in the classification process; And a method of inserting watermark information into each of the divided regions in the process. The method of claim 7, wherein the authentication process, Converting an image signal applied from the watermark process into a digital graphic format; The video signal security authentication method of the mobile terminal, characterized in that the process of performing the security authentication process by the TLS method and encrypting by the mobile communication method for wireless transmission.

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