KR100917996B1 - New P2P system that provides producers and sharers of digital contents with reasonable benefits,has the function of tracing illegal user,and has the function of preventing illegal files and illegal trades - Google Patents

Abstract

The present invention relates to a new P2P implementation technology capable of blocking trade of illegal files, tracking of traders of illegal files, and differential revenue distribution to producers and sharers of files for legal file transactions.

This new P2P system is applied to the fact that in the case of a specific file, adding a certain length of special data to the end of the file does not interfere with the normal operation of the file. This system implements the above three functions by applying.

Here, there are file formats such as * .mp3, * .zip, * .avi and * .mpeg for the types of files that do not interfere with normal operation even if a certain length of special DATA is added to the end of the file. .

P2P, Electronic TAG, Digital Signature, Hash, Illegal File

Description

New P2P system that provides producers and sharers of digital contents with reasonable, with illegal distribution blocking and file sharing tracking of files with specific properties benefits, has the function of tracing illegal user, and has the function of preventing illegal files and illegal trades}             

  1: "P2P system operation configuration conceptual diagram of the present invention"

  Fig. 2: “P2P registration file format structure diagram”

  Figure 3: As a "distribution file registration procedure diagram"

  Fig. 4: “Shared file inquiry and file transaction procedure diagram”

 <Description of Major Symbols in Drawing>

 The following describes only the main symbols that are key to understanding the present invention among the "key terms" used in each drawing. (The detailed description of other codes will be described in detail in the "Constructing of the Invention" section.)

-Electronic TAG [102]: Electronic TAG is a certain length of data added to the end of the original file.

-Digital signature private KEY [103]: Private key used when registering file in P2P client

-Producer name [105]: The name of the producer of the file to be traded.

Hash value [105]: Value obtained when cryptographic hash algorithm is applied to some data.

-List of paid files [108]: Files allowed for monetization

-Block list [105]: DB file consisting of file name, hash value, producer name, accessor ID, etc.

The technology of the present invention relates to the implementation design technology of a new P2P system that can be tracked and blocked in the case of trading a file, illegal files, and profit sharing for both file producers and file sharers.

P2P file sharing service is a personal-to-person information sharing technology on the Internet. Unlike a conventional information exchange method of connecting to an FTP server and exchanging information on a file through the FTP site, an information consumer is required to transmit or receive data. A service that generates information exchange using personal computer resources.

Existing P2P file sharing service offerings of this type include Soilsea, Napster, Donkey (e-Donkey), Gnutella, Kitella, Freenet, and VShare. Compared with the illegal file transaction prevention method applied to the existing P2P service, the main features of the present invention will be described as follows.

A. Technology, Products and Features Restricting the Use of Existing Illegal Files

Existing illegal file use restriction techniques include simple notification of illegal use, restriction through string filtering, illegal user blocking through DRM (Digital Rights Managements), and illegal user tracking through digital watermarking. Here are some examples of solutions using these technologies.

 a> Pruna copyright protection method

The copyright protection of Pruna, a P2P solution, is a non-mandatory copyright protection method that, upon request from the producer of the material, simply informs the public that it is illegal to share the known file through notification. This method limits the compulsory actions for the producers of the files because illegal users can ignore the notification and continue to share and use the illegal files.

 b> V-Share Copyright Protection

VShare, a peer-to-peer solution, uses string filtering to prevent illegal file sharing. If the word "butterfly effect" is managed by Vshare in a filtering list, the video file "butterfly effect" cannot be searched by Vshare's string filtering method. However, users can search for the file name "nape effect" with a slight variation of the "butterfly effect" and get a list of files whose name is "nappy effect" and the same content as the "butterfly effect". Will be able to share video files. In other words, the string filtering method can easily share illegal files through the modification of the blocking string, so that it does not help to protect the rights of the producer.

 c> Copyright protection through DRM

MP3 # of Soribadum, a shopping mall, is a representative service applying DRM copyright protection technology. When providing this service to users, DRM security technology is applied to each MP3 file. However, the user who downloaded the file has to install a dedicated player separately in order to use the purchased file. In addition, there is a problem that the purchased file can not be played on your other PC.

 d> Copyright Protection with Digital WaterMarking Technology

Digital WaterMarking technology is a technology that clearly determines whether the file is an illegal file or a legal file. Therefore, when sharing a file through P2P, it is possible to determine whether the file is legal or illegal, but the sharing path cannot be tracked.

B. Features of the P2P System of the Invention

 The features of the present invention can be largely divided into the following three.

end. Restriction on illegal file transactions

Pruna and Vshare, etc. restrict illegal files through simple notification and file name-based filtering, so users can simply share illegal files using shortcuts. Also, there were many difficulties in tracking users sharing illegal files. However, the P2P system of the present invention requires the electronic signature to be performed by the registrant's private key when registering a file without an electronic TAG (an unsigned file). You can keep track of registrants.

I. User convenience

When DRM technology is applied to a P2P system, when a user wants to execute a file downloaded through a normal purchase on another PC, it is troublesome to first install a dedicated program for the file to which the DRM technology is applied to the PC. The P2P system of the present invention works well as a general program even if a special DATA is added to the end of the file in the case of a file having an extension of * .zip, * .mpeg, * .avi, * .mp3, etc. You can run a file on any PC through a regular program. This provides users with more convenience than P2P programs with DRM technology.

All. P2P model pursuing the interests of producers over sharers

Existing P2P companies have distributed profits regardless of whether they are file producers or sharers. That is, even if the illegal file is shared, the existing P2P system lacks the audit and filtering function for the illegal file, so it is recognized as a contributor to the activation of the service rather than sanctioning the illegal file sharer. cyber money). The result has been a social abandonment where the benefit of the producer, rather than the producer, is gained through illegal files created by the producer.

 The present invention clearly distinguishes the concept of producers and sharers of files, and implements a technique that gives a differentiated status, thereby providing more profits to producers whenever they are traded through P2P, as well as providing existing point benefits to sharers. It is characteristic that can be done.

The present invention is to solve the illegal file distribution problem through the existing P2P service, convenience of use of the purchase file through the P2P service as described above, to achieve the object of implementing a system that can give more profit to the producer of the file The technical problem is as follows.

First, it implements design technique of traceable file structure for authenticating and authenticating information of original file producer, integrity, sharer, etc. without affecting original file function

Second, for the specially designed files as above, a technique for checking whether illegal files and blocking illegal file transactions

Third, when trading files, producers and sharers' differential profit sharing model implementation technique

In order to achieve the above object, the present invention is largely composed of P2P client (file producer, file consumer, file sharer), P2P server, DB server and authentication server. Each component has the following functions.

end. P2P Client / Server Program Operation Model Diagram [Figure 1]

-File consumer: the person requesting the file

-File Sharer: The person who provides the file through sharing

-File producer: producer of the file

-P2P server: relays file transactions between file consumers, sharers, and producers

   System for performing various payments

-Authentication server: A server that provides a certificate of a producer of a file or a certificate of a P2P user.

I. Producer or sharer registration file structure

  Initially, the producer or sharer of a file first converts his file into the following file format as shown in FIG. 3, in order to register his file to the P2P server of the present invention, and after verifying the validity of the electronic TAG, the file of the P2P server normally. In the list DB, information such as producer's or sharer's IP, TAG information of the file and paid price is registered.

The detailed structure of the file produced by the above process is as follows.

[Table 1] Shared file format

Definitions of the modified file structure terms are as follows.

 -Original Data: Data of the original producer file, abbreviated A.

 -Electronic TAG: In Table 1, ID (A), SH (A), M (A), N (A), P (A), Hash (A), CA, AGE, Sign_P (A), RS ( A) (Sharer ID List value) refers to the data value that is connected in order.

 -Electronic TAG header: This field exists between the original file A and the electronic TAG, and performs functions such as version of the electronic TAG, attributes of each field of the electronic TAG, and location information.

 -Sharing bit: The part that indicates whether the file producer or sharer shares the file.

 -Paid bit: part that determines whether the file is paid or free

 -Product Name: Product Name

 -Producer Information: The producer information of the original file A

 -Hash value: The value of hashing A, the original data, with a cryptographic hash algorithm

 -Authentication Center Information: Information on the authentication center that manages the public key corresponding to the producer's private key.

 Adult Grade: Adult content display field that is not visible to subscribers under the age of 19.

 -Producer Signature Value: The value signed by the producer's private key through [e-signature expression].

 -Sharer ID List: The value that connects the user ID who shared the file after the first file A is registered.

All. Electronic TAG Granting Process

When the producer or sharer wants to register the file for the first time in the P2P server, the conversion procedure of the file format is as follows.

Step 1> The electronic TAG header is determined and entered by the P2P client program version of the file producer or sharer.

Step 2> For the original file A, the producer decides whether to share the file. If you want to share, set the shared bit value to 1. Otherwise set it to zero.

Step 3> Producer sets the paid bit value according to whether to pay for sharing the original file. For example, set it to 1 for pay, or 0 for pay.

Step 4> The producer enters the official product name for the original file A.

Step 5> Enter the cryptographic hash algorithm for the source file A. This part can be input automatically by P2P client's own program function.

Step 6> Extract CA information (CRL information and subject information) from producer's personal certificate

        Save it.

Step 7> The producer assigns an adult grade to the original file.

Step 8> Producer executes digital signature by using producer's own private key.

a. First, let's call Identities (A) as the data below, which combines all the values configured through Step 1> ~ 6.

Identities (A) = ID (A) + SH (A) + M (A) + N (A) + P (A) + Hash (A) + CA (A) + AGE (A)

b. Using the cryptographic Hash function:

H (Identities (A))

c. The digital signature value Sign_P (A) is obtained as the producer or sharer's private key as follows.

Sign_P (A) = Encryption [H (Identities (A))] with private key of producer or sharer

Step 9> Producer first inputs his ID in the sharer ID list. (In this part, the sharer ID is added whenever the file has a sharing transaction in the future.)

la. Electronic TAG normal confirmation method

The information in the electronic TAG tells the producers whether they are authentic or not, and plays a key role in the distribution of files.

First, let's say B is the original file to be distributed. This shared file has a format of [B + Electronic TAG (B)] as shown in [Table 1]. The procedure for checking whether the electronic TAG of the original file B is normally generated is as follows.

Step 1> Obtain the storage space size information allocated to the electronic TAG from the environment information rotor of the P2P client, and read only the electronic TAG (B) data size from the end of the shared registration file [B + Electronic TAG (B)].

Step 2> Check if the header of the electronic TAG is in standard format, otherwise the digital signature will fail. When the header of the electronic TAG exists in a standard format, the P2P program obtains each field, such as each shared bit, according to the convention of the electronic TAG header.

Step 3> Read the digital signature value from the electronic TAG. This value is referred to as Sign_P (B ') in this description. (B': virtual source file DATA)

Step 4> Secure the producer's certification center location from the producer information [P (B)] and certification center information [CA] in the TAG (B) file. Pub_key], and performs the following calculation.

Decryption (Sign_P (B ')) with Public key [Pub_key]

Step 5> Identities (B) (= ID (B) + SH (B) + M (B) + N (B) + P (B) + Hash (B) + CA ( B) Extract + AGE (B)) and execute the hash as shown below.

H (Identities (B))

Step 6> Finally, compare the values obtained in Step 4> with the values obtained in Step 5> and check if they match. If they are the same, then Hash the original file B to make Hash (B) ', and then hash it in the electronic TAG. Compare with If it is equal, it succeeds. If it is not equal, it fails.

hemp. Producer file registration and sharing registration step (Drawing 3)

This process describes a process where a file producer or file sharer requests a registration to a P2P server for distribution of a file. First, the file producer or file sharer creates a list of files he / she wants to distribute. The P2P client installed on its system then checks the existence of the electronic TAG for each file on the list. In the case of a file without an electronic TAG , the file signature of the digital signature private key is used . Electronic TAG grant procedure ” Convert the file to file format [Table 1] [103]. If there is an electronic TAG, the P2P client should check whether the electronic TAG is normal . Electronic TAG Normal Confirmation Method “Perform a check. [110]

If the electronic TAG is not normal, registration is rejected.

If all the above steps are passed, the electronic TAG, P2P client IP information, and file name are sent to the P2P server. Then, the server refuses registration if the producer name and hash value in the received electronic TAG exist in the block list DB. However, if it does not exist in the block list DB, it is determined whether the file is paid and whether the P2P server access account is a payable member, and if it is free, it is unconditionally registered, and if it is not a registered member, the registration is rejected. 106] [107].

bar. Shared File Inquiry and File Sending and Receiving Step (Figure 4)

In this step, the file consumer is provided with information such as the system IP where the desired file exists, the port used for transmission and reception, and the corresponding file size. First, the file consumer inputs a string of information he / she wants and sends the string to the P2P server. Then, the P2P server checks whether the file associated with the string exists, and if it does not exist, ends with a search failure [202]. However, if it exists, the list of IPs available for sharing the file, IP user information, and whether or not to pay is displayed as a list, among which the file consumer automatically or manually selects a specific share providing IP that provides a specific file [204]. If the selected file is a paid file, the file consumer will be informed that the paid file is a popup window for resentment. [205]. The P2P server provides mutual IP information, PORT information, and corresponding file size information to be used when communicating with a file user or a selected file provider.

In addition, the client of the file consumer receives the electronic TAG of the file to be transmitted / received from the P2P server or the sharer client and checks whether it is normal [207]. Start transmission and reception. [208]

The file consumer waits for one-half of the file he / she wants, and automatically sends a primary settlement request signal to the P2P server at half-time. [209] Then, according to whether the file is paid or free, the P2P server performs the first point transaction corresponding to the money between the producer, the file user, and the file shareer at the time of receiving the first half of the file. When the file is downloaded, the rest of the settlement is performed. [210-214] In the case of free, only the general point transaction occurs between the file sharer and the file consumer, and the process of searching and transmitting the file is completed. 217]

four. Profit sharing technique between producers, sharers, and P2P server operators

This step relates to a technique for distributing profits based on the DATA attribute in the electronic TAG of the transaction file in file transmission / reception steps [212-214].

The general P2P system including the P2P of the present invention performs the first settlement at the time point of receiving half of the original data size when transmitting and receiving a file.

In general, however, other P2P systems cannot distinguish between file producers and file sharers because there is no file producer information in the transaction file itself. So even when a file consumer receives 1/2 of the desired file from the file provider, the P2P server has no choice but to recognize the file provider as a file producer, paying the file sharer half of the transaction file. .

The P2P system extracts the producer information in the electronic TAG of the file and transmits it to the P2P server when the file is transmitted and received between the file consumer and the sharer.

Then, the P2P server, based on the producer information received, does not give all the benefits to the file sharer, unlike the existing P2P system, for this file transaction. Differential profit sharing is possible for file sharers and file producers.

As described above, the P2P solution of the present invention provides a foundation that can induce users to use legitimate files more powerfully than existing solutions, thereby preventing social loss caused by illegal copyright files being distributed through the P2P. By contributing to the reduction, it can contribute to the development of the national IT industry.

Claims (19)

delete delete delete delete delete delete As a method of creating a data file having a file structure capable of blocking illegal distribution of files and sharing and sharing the files during distribution through P2P, And adding an electronic tag to the original data to block illegal distribution of the data file and track the file sharing. Here, the electronic tag adding step, a) generating, by a producer client used by the original producer of the data file, a hash value comprising the hashed value of the original data by a cryptographic hash algorithm and adding to the original data; b) the producer client extracting authentication center information from the producer's personal certificate and adding it to the original data; c) the producer client generates a producer signature value by encrypting the data including the hash value generated by steps a) and b) using the producer's private key to add to the original data. Making; d) The producer client generates a list of sharer IDs to be input for each share transaction when the sharer ID of the sharer is distributed in the distribution of the data file, and inputs the producer ID of the producer to the sharer ID list to the original data. Adding; And e) adding, by the producer client, an electronic tag header containing attribute information for each field in the electronic tag to the original data; Method of generating a data file comprising a. The method of claim 7, wherein The electronic tag adding step, Adding, by the producer client, a shared bit to the original data, the sharing bit having information on whether the producer or the sharer allows sharing of the data file; Adding, by the producer client, to the original data a paid bit having information on whether the distribution of the data file is free or paid; Adding, by the producer client, a production product name having the product name of the data file to the original data; And Adding, by the producer client, the adult grade to the original data indicating whether the original data is adult; Method of generating a data file, characterized in that it further comprises at least one of. The method of claim 8, And the producer ID is further included in the data encrypted in step c). P2P that receives a request for registration of the data file from a client used by the producer or consumer or the client of the producer for a data file having a file structure capable of blocking illegal distribution of files and sharing the file during distribution through P2P. As a method of checking whether the data file is normally generated by a server, The data file, Original data including data produced by the original producer of the data file; And And an electronic tag added to the original data to enable illegal distribution blocking and file sharing tracking of the data file. Here, the electronic tag is, An electronic tag header including attribute information for each field in the electronic tag; Producer information including information about the producer; A hash value that hashes the original data with a cryptographic hash algorithm; Authentication center information for managing public keys corresponding to the producer's private key and the sharer's private key of the data file after distribution of the data file; A producer signature value obtained by encrypting data including the hash value with the producer's private key or the sharer's private key; And A sharer ID list including the sharer ID; It is configured to include, Method for confirming whether the data file is normally created, A) confirming whether a standard format of the electronic tag header in the electronic tag; B) reading the producer signature value in the electronic tag if it is determined in step A) that the standard format; C) acquiring the public key of the producer from the authentication server of the authentication center by securing an authentication center location based on the producer information and the authentication center information in the electronic tag; D) decrypting the producer signature value using the producer's public key; E) comparing the value obtained by decrypting in the step D) with the data containing the hash value which was the object of encryption by the producer or the sharer's private key to obtain the producer signature value when generating the electronic tag, If it matches, determining that the data file is normally created; Method of confirming whether or not the normal generation of the data file comprising a. As a data file registration method for registering to a P2P server for the distribution of a data file having a file structure capable of blocking illegal distribution of files and sharing and sharing the files during distribution through P2P, The data file, Original data including data produced by the original producer of the data file; And And an electronic tag added to the original data to enable illegal distribution blocking and file sharing tracking of the data file. Here, the electronic tag is, An electronic tag header including attribute information for each field in the electronic tag; Producer information including information about the producer; A hash value that hashes the original data with a cryptographic hash algorithm; Authentication center information for managing public keys corresponding to the producer's private key and the sharer's private key of the data file after distribution of the data file; A producer signature value obtained by encrypting data including the hash value with the producer's private key or the sharer's private key; And A sharer ID list including the sharer ID; It is configured to include, The data file registration method, A) the producer client sending the electronic tag in the data file to the P2P server; B) checking, by the P2P server, whether the received electronic tag is normal by a method of confirming whether the data file is normally generated as described in claim 10; C) registering the data file by the P2P server when it is determined as normal in step b); Data file registration method comprising a. The method of claim 11, The step c) is performed when the hash value in the electronic tag received by the P2P server from the producer client does not exist in the DB of the P2P server. delete The method of claim 11, C), C-1) determining, by the P2P server, whether the distribution of the data file is free from the information included in the electronic tag; And C-2) The P2P server registers the data file when it is determined to be free in the step c-1), and when the producer client accesses the P2P server when the fee is determined to be paid, the data may be registered. Registering a file; Data file registration method comprising a. A data transmission / reception method for distributing a data file having a file structure capable of blocking illegal distribution of a file and sharing and tracking a file when distributing through P2P in a P2P manner, The data file, Original data including data produced by the original producer of the data file; And And an electronic tag added to the original data to enable illegal distribution blocking and file sharing tracking of the data file. Here, the electronic tag is, An electronic tag header including attribute information for each field in the electronic tag; Producer information including information about the producer; A hash value that hashes the original data with a cryptographic hash algorithm; Authentication center information for managing public keys corresponding to the producer's private key and the sharer's private key of the data file after distribution of the data file; A producer signature value obtained by encrypting data including the hash value with the producer's private key or the sharer's private key; And A sharer ID list including the sharer ID; It is configured to include, The method of transmitting and receiving the data file, (A) receiving, by a consumer client, a consumer of the data file, the electronic tag for the data file from a P2P server or a sharer client that is a supplier of the data file; B) checking whether or not the electronic tag received by the consumer client is normal by performing a method of confirming whether a data file is normally generated as described in claim 10; And C) receiving the data file from the sharer client when it is determined that the normal existence exists in step b); Method of transmitting and receiving a data file comprising a. delete The method of claim 15, (D) if the consumer file pays for the data file for the P2P server by the consumer client; Data file transmission and reception method further comprising. The method of claim 17, The step d), D-1) after the consumer client receives the part of the data file, the consumer client pays a part of the price of the data file to the P2P server; And D-2) after the consumer client completes the reception of the data file, the consumer client settles the remainder of the payment for the P2P server for the P2P server; Data file transmission and reception method further comprising. The method of claim 15, E) distributing, by the P2P server, the costs settled by the consumer client to the producer client and the sharer client; Data file transmission and reception method further comprising.

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