KR100724721B1 - How to provide a message using watermarking - Google Patents

Abstract

The present invention relates to a message providing method using watermarking, the method comprising: generating, by a user of a calling terminal, original text data to be sent to a receiving terminal; Selecting, by the calling terminal, the water marking image stored in the watermark image storage device of the operator server or transmitting the same to the receiving terminal along with the original text data; Combining, by the operator server, the original text data created through the calling terminal and the selected watermarking image through a watermarking message generating apparatus of the operator server to generate a watermarking message, and transmitting the watermarking message to the receiving terminal through a mail server; Receiving a watermark so that the receiving terminal receives the watermarking message through the internet network and the receiving device, and separates the text data and the watermarking image; Separating the original data and the watermarking image by the decryption apparatus of the receiving terminal when the password is received; And checking the separated original data through the output device 340 of the receiving terminal 200. According to the present invention configured as described above, it is possible to keep the original text data secret by preventing the third party from verifying the original data transmitted to the receiving terminal.

Watermarking, Internet Network, Mail Server, Mobile Communication Terminal, Short Message

Description

Message providing method using watermarking {METHOD FOR PROVIDING MESSAGE USING WATERMARKING}

1 is an exemplary view illustrating an information communication system applied to a message providing method using watermarking according to an embodiment of the present invention.

Figure 2a is a block diagram of a watermarking message generating device of the operator server of Figure 1;

Figure 2b is a block diagram of a decryption apparatus of the receiving terminal of Figure 1;

3 is an overall flowchart of a message providing method using watermarking according to an embodiment of the present invention;

4 is an exemplary diagram illustrating combining and separating original text data and a watermarking image according to the flowchart of FIG. 3;

5 is a flowchart illustrating in detail the generation of a watermarking message of step S430 of FIG.

<Description of the symbols for the main parts of the drawings>

100: calling party terminal 110: personal computer

120: mobile communication terminal 150: Internet network

200: operator server 210: central processing unit

220: memory device 230: mail server

240: watermarking image storage device 250: watermarking message generating device

300: receiving terminal 310: receiving apparatus

320: decryption device 330: storage device

340: output device 350: control device

The present invention relates to a message providing method using watermarking, and more particularly, to insert a watermark image into original text data transmitted from a calling party terminal to a called party terminal to maintain a confidentiality of original text data from a third party. The present invention relates to a message providing method using marking.

Recently, with the rapid development of information and communication technology, a universal network called the Internet, which can communicate with the other party anywhere in the world, has been widely used. E-mail service for transmitting multimedia data such as text, emoticons, and images to a computer, and Short Message Service (SMS) for transmitting a short message to a mobile communication terminal of the other party are utilized.

On the other hand, with the rapid spread of mobile communication terminals, the proportion of users using short message services is increasing rapidly. This is because computers can be delivered almost simultaneously with the time of sending, unlike e-mail. Through the service that can easily send a short message to the other party's mobile communication terminal is already firmly established.

In particular, the short message through the mobile terminal can be easily used by anyone because the information is provided interactively for the user's convenience, and in recent years, credit card companies to send a transaction approval information through a short message to prevent card accidents The scope of application continues to be extended to electronic payments and e-commerce, such as the introduction of the.

However, when a short message including personal secret information such as a bank account number and a social security number is transmitted to a counterpart through a computer and a mobile communication terminal, the secret information is exposed to a third party and used for various crimes.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object thereof is to insert a watermark image into the text data transmitted from the calling terminal to the receiving terminal, thereby maintaining the confidentiality of the text data from the third party. It is to provide a message providing method using marking.

Message providing method using the watermarking of the present invention for achieving the above object (A) step of creating the original text data to be sent to the receiving terminal 300 by the user of the calling terminal 100 (S410) ; (B) the calling terminal 100 selects a watermarking image stored in itself or stored in the watermarking image storage device 240 of the operator server 200 and transmits the watermarked image to the receiving terminal 300 together with the original text data. Step S420; (C) the operator server 200 generates the watermarking message by combining the original text data created through the calling terminal 100 and the selected watermarking image through the watermarking message generating apparatus 250 of the operator server 200. (S430), transmitting to the receiving terminal 300 through the mail server 230 (S440); (D) receiving the watermark message through the Internet network 150 and the receiving device 310 by the receiving terminal 300, and then receiving a password to separate the original data and the watermarking image (S450). ; (E) when the password is received through the step (D), the decryption device 320 of the receiving terminal 300 to separate the original text data and the watermarked image (S460); And (F) checking the original text data separated through the step (E) through the output device 340 of the receiving terminal 200 (S470).

Here, in the watermark generation step (S430) of the step (C), (C1) the frequency conversion unit 252 of the watermarking message generating device 250 is the watermarking image selected by the caller terminal 100 Converting to a frequency domain using a wavelet transform and converting the data into a form combinable with the original data (S432); (C2) combining the watermarking image converted into the frequency domain and original text data by the combiner 254 of the watermarking message generating apparatus 250 (S434); And (C3) generating a watermarking message together with original text data by converting the watermarking image converted into the original watermarking image by the inverse converter 256 of the watermarking message generating apparatus 250 ( S436) is preferable.

Further, in the step (C2), it is preferable that the original data is combined with a watermarked image which is converted into the frequency domain after being encrypted by PN code.

In addition, in the step (E), the watermarked image is converted into a frequency domain through wavelet transformation of the transform unit 321 of the decryption device 320, and the original text data of the PN code application unit 323 It is preferable to decode through the application of the PN code.

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention.

1 is an exemplary view illustrating an information communication system applied to a message providing method using watermarking according to an embodiment of the present invention, and FIG. 2A is a detailed configuration diagram of an apparatus for generating a watermarking message of an operator server of FIG. 1. FIG. 2B is a detailed block diagram of the decryption apparatus of the receiving terminal of FIG. 1.

As shown in FIG. 1, the information communication system to which the present invention is applied is composed of a calling terminal 100, an internet network 150, an operator server 200, and a receiving terminal 300.

The calling terminal 100 transmits the watermarking message related to the present invention to the receiving terminal 300 through the Internet network 150 and the operator server 200, and the CPE of Pentium or higher, 64Mb or higher. A computer that can display web content as a communication computer device including RAM, hard disk, CD-ROM, information input device including mouse and keyboard, output device including monitor and speaker, and Windows 98 or higher operating system. It is equipped with a browser, and includes not only a personal computer 110 such as a desktop computer and a laptop, but also a mobile communication terminal 120 such as a cellular phone and a PDA capable of wireless Internet communication.

The internet network 150 includes a wireless Internet network such as a TCP / IP protocol that can be connected by wire and a WAP protocol that can be wirelessly connected.

The operator server 200 includes a central processing unit 210, a memory device 220, a mail server 230, a watermarking image storage device 240, and a watermarking message generating device 250. Although not shown, it includes a data input device including a mouse and a keyboard and a data output device including a monitor.

In this case, the operator server 200 is a general mobile communication business or a concept including a mail service provider such as Hotmail and Yahoomail.

The central processing unit 210 should be able to execute a large number of mathematical calculations and examine the database when exchanging information between the originating terminal 100 and the receiving terminal 300 according to the present invention. It is operated by the operating system.

The memory device 220 temporarily stores data related to the present invention, and is preferably a memory device of 1 GB or more.

The mail server 230 may transmit and receive a watermarking message related to the present invention, and is a general mail server including a member DB.

The watermarking image storage device 240 manages a database by general commercial database management software, and stores an image related to watermarking applied to the present invention.

As shown in FIG. 2A, the watermarking message generating apparatus 250 may combine the short message (hereinafter, referred to as “original data”) and the watermarking image, such as the frequency converter 252 and the combiner 254. ) And an inverse transform unit 256.

The frequency converter 252 converts the watermarked image selected by the calling terminal 100 into a frequency domain using a wavelet transform and converts it into a form that can be combined with original text data.

The combiner 254 combines the watermarked image converted into the frequency domain and original text data encrypted through a pseudo random code.

In this case, the threshold value is randomly applied to the watermarked image converted into the frequency domain according to the shape or size of the watermarked image.

The inverse transform unit 256 generates a watermarking message by converting the watermarked image converted into the frequency domain into a spatial domain, that is, the original watermarked image.

The receiving terminal 300 has the same configuration as a general mobile communication terminal, the receiving apparatus 310 for receiving the watermarking message and various information transmitted from the calling terminal 100, the original data of the watermarking message and Decryption apparatus 320 for separating the watermarking image, Storage device 330 for storing various information, Output device 340 for outputting the original text data separated through the decryption device 320 and each of the devices (310 to) It is composed of a control device 350 for controlling the communication of the 340.

Here, the decryption device 320 separates the original data and the watermarked image so that the user of the receiving terminal 300 can check the original text, as shown in FIG. 2B, and the conversion unit 321 and the PN code are applied. It consists of a part 323.

The converter 321 converts the watermarked image of the watermarking message in which the original data and the watermarked image are combined into a frequency domain using wavelet transform.

The PN code application unit 363 extracts the original text data by decrypting the original text data encrypted by applying the PN code.

Hereinafter, a message providing method using watermarking according to an embodiment of the present invention will be described with reference to FIGS. 1 to 5.

3 is an overall flowchart of a message providing method using watermarking according to an embodiment of the present invention, and FIG. 4 is an exemplary view showing combining and separating original text data and a watermarking image according to the flowchart of FIG. 5 is a flowchart specifically illustrating generation of a watermarking message in step S430 of FIG. 3.

First, as shown in (a) of FIG. 4, the user of the calling terminal 100 creates a message to be sent to the other party of the receiving terminal 300 through input means, that is, original text data (S410).

When the original text data is created, when the computer 110 of the calling terminal 100 is used, the original text data is created after accessing the operator server 200 through the Internet network 150, and the mobile communication terminal 120 is connected. In case of using, write original data through general letter writing function.

After creation of the original data, as shown in FIG. 4 (b), the calling party terminal 100 is stored in its own water or stored in the watermarking image storage device 240 of the operator server 200. The marking image is selected, the phone number of the receiving terminal 300 is input and then transmitted (S420).

In this case, the watermarked image may be selected from a plurality of images stored and managed in the calling party terminal 100, and water provided through the watermarking image storage device 240 of the operator server 200. Any one of the marking images may be selected.

In addition, in one embodiment of the present invention, the watermarking image is set as a heart shape, but is not limited thereto, and may be any shape as long as it is an image that does not show original data such as an asterisk and a circular shape or an animal shape.

Thereafter, as shown in FIG. 4C, the operator server 200 combines the original text data created through the calling terminal 100 and the selected watermarking image through the watermarking message generating apparatus 250. Generate a watermarking message associated with (S430).

Here, a process of generating a watermarking message by combining original text data and the selected watermarking image through the watermarking message generating apparatus 250 will be described in detail with reference to FIGS. 2A and 5.

First, while a watermarking image is selected through the calling terminal 100, the frequency converter 252 of the watermarking message generating apparatus 250 converts the selected watermarking image into a frequency domain using wavelet transform. The data is converted into a form that can be combined with the original data (S432).

Thereafter, the combiner 254 of the watermarking message generating apparatus 250 combines the watermarked image converted into the frequency domain and the original text data (S434).

In this case, the original data is binary data, and encrypted with a PN code, and then combined with the watermarked image converted into the frequency domain.

Next, the watermarking message generator 250 converts the watermarked image converted into the frequency domain through the inverse transform unit 256 into a spatial domain, that is, the original watermarked image, and combines the watermarked message with the original text data. It generates (S436).

After generating the watermarking message through the step S430, the operator server 200 transmits the generated watermarking message to the receiving terminal 300 through the mail server 230 (S440).

Thereafter, the receiving terminal 300 receives the watermarking message through the Internet network 150 and the receiving device 310, and then, as shown in FIG. A separate password is received from the user to separate the watermarking image (S450).

In this case, the password may be a password previously set by the user of the receiving terminal 300 for the watermarking message, or the user of the calling terminal 100 and the receiving terminal 300 to the operator server 200 in advance. It may be a password registered in advance as a member and negotiated, or may be a password of a receiving terminal itself.

When the password is received through the step S450, as shown in (e) of Figure 4, the decryption device 320 of the receiving terminal 300 separates the original data and the watermarked image (S460).

At this time, the watermarked image of the watermarking message is changed into a frequency domain by wavelet transforming through the converting unit 321 as shown in FIG. 2B, and the encrypted original data is converted into a PN code through the PN code applying unit 323. Is decrypted by applying.

Finally, as shown in (f) of FIG. 4, the user of the receiving terminal 200 confirms the original text data separated through the output device 340 in step S460 (S470).

Therefore, even if a third party steals the message received from the originating terminal 100 to the receiving terminal 300, the third party can only confirm the watermarking image, and thus the original text data cannot be confirmed, thereby maintaining the confidentiality of the outgoing message. Can be.

Although the present invention has been described above according to an embodiment of the present invention, a person skilled in the art to which the present invention belongs has changed and modified within the scope without departing from the technical spirit of the present invention. Of course.

That is, although an embodiment of the present invention has been described based on a short message transmitted from the calling terminal 100, that is, the computer 110 and the mobile communication terminal 120 to the receiving terminal 300, the calling terminal. It may also be applied to an e-mail transmitted from the 100 to a computer and a mobile communication terminal.

In addition, the present invention can be applied to multimedia data for keeping secrets such as video, audio, documents, and video for watermarking.

As described above, according to the message providing method using watermarking according to the present invention, the original text transmitted by the third party to the receiving terminal by inserting a watermark image into the text data transmitted from the calling terminal to the receiving terminal. It is possible to keep the original data confidential by not allowing the data to be verified.

Claims (4)

(A) a step in which the user of the calling terminal 100 creates original text data to be sent to the receiving terminal 300 (S410); (B) the calling terminal 100 selects a watermarking image stored in itself or stored in the watermarking image storage device 240 of the operator server 200 and transmits the watermarked image to the receiving terminal 300 together with the original text data. Step S420; (C) the operator server 200 generates the watermarking message by combining the original text data created through the calling terminal 100 and the selected watermarking image through the watermarking message generating apparatus 250 of the operator server 200. (S430), transmitting to the receiving terminal 300 through the mail server 230 (S440); (D) receiving the watermark message through the Internet network 150 and the receiving device 310 by the receiving terminal 300, and then receiving a password to separate the original data and the watermarking image (S450). ; (E) when the password is received through the step (D), the decryption device 320 of the receiving terminal 300 to separate the original text data and the watermarked image (S460); And (F) checking the original text data separated through the step (E) through the output device 340 of the receiving terminal 200 (S470), Generating the watermarking message (S430) of step (C), (C1) The frequency converter 252 of the watermarking message generating apparatus 250 converts the watermarked image selected by the calling terminal 100 into a frequency domain using wavelet transform to be combined with original text data. Converting (S432); (C2) combining the watermarking image converted into the frequency domain and original text data by the combiner 254 of the watermarking message generating apparatus 250 (S434); And (C3) generating a watermarking message together with original text data by converting the watermarking image converted into the original watermarking image by the inverse converter 256 of the watermarking message generating apparatus 250 (S436) ), In the step (E), The watermarked image is converted into a frequency domain through wavelet transform of the transform unit 321 of the decryption device 320, and the original data is decoded by applying the PN code of the PN code application unit 323. Message providing method using a watermark characterized in that. delete The method of claim 1, In the step (C2), And the text data is combined with a watermarked image which is converted into the frequency domain after the original data is encrypted through a PN code. delete

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