KR100595717B1 - Play back control method for digital contents - Google Patents

Abstract

The present invention relates to a method for controlling playback of digital content, and registers information of a network terminal in a content providing server, and if there is a request for content transmission in the network terminal, confirms that the network terminal has no restriction in transmission and requests the content. By sending one content and authentication file, it is possible to download new contents immediately through communication network only in case of network terminal of authorized business, satisfying user's needs, and restricting use for contents that are not paid. There is an effect that can increase the profitability by enabling.

Description

PLAY BACK CONTROL METHOD FOR DIGITAL CONTENTS}

1 is a block diagram showing the configuration of a network terminal network according to the present invention;

Fig. 2 is a flowchart showing the processing of the server when the information of the network terminal is changed according to the present invention.

3 is a flowchart for explaining a schematic process until downloading and playing content in a network terminal according to the present invention;

4 is a block diagram showing a schematic configuration of an authentication database created in each network terminal according to the present invention;

The present invention relates to a network terminal, and in particular, it is possible to download new content only in the case of an authorized network terminal of a licensed business, and content for a terminal that has not been paid for the content or changes hardware without authorization. By restricting the download, the present invention relates to a method of controlling reproduction of digital content, which can prevent the use of the stolen terminal and increase the profitability of the content provider.

Singing a song is a device that allows only accompaniment without a song, and this song was first invented in the early 1970s, when it was made possible to sing songs with cassette melodies.

This was replaced by CDs with video and music in the 1980s, and laser discs since 1984.

Since then, the song cycle has evolved, and since 1988, small groups of people have been able to enter and sing in small rooms (karaoke rooms), and because of the advantage that there is no great burden for different generations and families. It is still popular.

In addition, this karaoke culture has changed the popular music and music industry, forming a huge market by half-cycle and song content sales.

In other words, when a new song is released, the song contents provider embeds the newly arranged hit song on a chip (IC) or CD-ROM every 1-2 months and supplies it to each karaoke store through a distributor. This is because the number of units reaches tens of thousands, and the profit from the sale is beyond imagination.

However, there is a problem that the operation method and profit structure are not strong or reflect the current situation compared to the industry.

For example, the recent young generation wants to sing new songs quickly. As described above, the karaoke shop has to wait at least two months to receive the LD or fairy tale CD in which the latest songs are edited.

In addition, song contents stored in a medium (IC, CD-ROM, etc.) are in a form that is easy to copy, and the medium can be used for any half-period of the song, resulting in illegal copying by a non-authorized distributor. There was a problem that could hinder the development of the karaoke industry due to the reduced profitability of the relevant licensed companies.

In addition, the karaoke establishment should pay the fee as soon as the agency receives the contents in the form of IC or CD-ROM, but in reality, the contents are provided first, and the fees are irregularly paid or not paid. For this reason, they could not continue to provide content without sanctioning the unpaid fees or urging fees.
In other words, since the karaoke shop is to receive the contents and pay the fee the next month, there is no effective way to sanction it when the fee is not paid.

Accordingly, the present invention has been created to solve the above-mentioned conventional problems, and only allows the download of new content when the authorized network terminal of the licensed business is established, and the fee has not been paid for the content or the hardware is used. The purpose of the present invention is to provide a method of controlling the reproduction of digital content that prevents the use of the stolen terminal and increases the profitability of the content provider by restricting the download of contents for unauthorized terminals. .

In order to achieve the above object, the present invention registers information of a network terminal (single-half cycle) in a content providing server, and when there is a request for delivery of content in the network terminal, the content providing server provides a network with no restriction in transmission. It is characterized in that the terminal is configured to transmit the requested content and the authentication file.

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

Fig. 1 is a block diagram showing the structure of a network terminal network according to the present invention. The network terminals IK1 to IKn installed in each karaoke establishment (business A through establishment C) are agents (agent A, agency B) that manage the establishment. ) Is registered with a content provider's server (hereinafter referred to as server) by a management tool (for example, a management program).

In this case, the information registered in the server includes a unique ID of each main body of each of the network terminals IK1 to IKn, and a serial number of the unique ID and a data storage device (for example, a hard disk). SN), the Machine Key (MK) generated by the network address (Network IP) of the player, and each karaoke store code.

Fig. 2 is a flow chart showing the server process when the information of the network terminal is changed according to the present invention. When the storage device is replaced, when the ID of the network terminal main body (mainboard) is registered, It is possible to change the key, but if the ID is not registered, it is difficult to change the machine key. In this case, the ID must be registered first to change the machine key.

In addition, since the ID is changed when replacing the motherboard, it is the same as registering a new device, so a new ID must be registered through a dealer.

Therefore, if the device (network terminal) of the registered karaoke shop is stolen or tampered with the hardware of the device, the user cannot download the content because the authentication process does not pass when the server is accessed for content download.

In addition, when the content is downloaded, an authentication file for downloading the content is downloaded according to whether or not the fee of the content being downloaded and used is downloaded. According to the content of the authentication file, a terminal-specific authentication database in the network terminal storage device is downloaded. Is updated. Through this authentication database, it is possible to disable the reproduction of the contents when the contents are duplicated and the fee is overdue.

Hereinafter, a process for downloading content from a network terminal will be described in more detail.

Once produced, the network terminal registers the business code, the ID of the main body of the device, the machine key (MK), etc. in the content providing server through the agency managing the business when it is sold to each karaoke store.

At this time, the contents input to the network terminal is processed by receiving the initial authentication file through the agency.

In this case, the initial authentication recognizes that a fee has been paid for the contents up to the time of purchase of the network terminal, and collectively authenticates all contents up to the date registered with the server.

Next, when the network terminal registration and initial authentication process through the dealership as described above, the karaoke store can be frequently connected to the server (from the karaoke store from the next month) to download the content and authentication files, if direct access is not possible The distributor will be able to download the content.

Of course, you must go through the normal authentication procedure.

In this case, normal authentication means that when the content is requested to be downloaded, the newly generated normal authentication file is downloaded together with the billing information of the corresponding business to permit permanent authentication of the paid content only when the registered device of the corresponding business is used. do.

In other words, the normal authentication is applied on a monthly basis whenever the content fee is paid. For example, when the June fee is normally paid in July, billing information is input to the server, and the normal authentication file for the content in June This can be generated and sent automatically when connecting to the server or through an agency.

In the process of processing the normal authentication file, the authentication date is recorded in a memory (EEPROM: ROM capable of modifying and additionally recording the contents) built into the device itself. The previous content may be determined to have been paid, so that a free service (recovery authentication) may be received. In addition, through the process of checking whether the half-cycle information in the authentication file and the half-cycle information of the corresponding business match at the beginning of the processing process, the authentication database is not updated because the authentication process is not performed if different.

When the normal authentication processing is correctly completed, the normal authentication date and the authentication file (authentication database) are updated in a memory (not shown) in the network terminal, and the server is notified that normal authentication has been applied. If the server does not confirm successful processing of normal authentication, the server sends a normal authentication file each time until successful processing is confirmed.

Therefore, if the unique ID and machine key (MK) of the network terminal is changed by the replacement of the network terminal main body and the storage device, normal authentication is not processed.

At this time, the change information should be registered in the server. When the server is connected to the server after the recovery authentication based on the change information, the normal authentication file including the modified information is automatically downloaded.

Here, the recovery authentication is an authentication applied when the network terminal information of the business is changed or the authentication database is damaged. The recovery authentication is permanent-license of songs up to the billing month (the last month in which the fee is paid).

In the above description of the initial authentication, normal authentication, recovery authentication, this authentication is to assign a license number (License Number) for each song content in order to limit security and charge overdue.

For example, temporary payment is granted until payment of the downloaded contents is confirmed and normal authentication is processed. If the fee is overdue for a predetermined period (more than 2 months), temporary-certification was held. The contents are all changed to expiration-license and cannot be played. If the normal authentication is processed by paying a fee, the contents are given permanent-authentication so that they can be played.

3 is a flowchart illustrating a schematic process of downloading and playing contents from a network terminal according to the present invention. When the user boots the terminal (single cycle), an initialization process is performed.

In the initialization process, it checks the database, checks slave status (if it is a master), and waits for communication with the master (if it is a slave).

At this time, the master is a network terminal that communicates with a server or agency of a content provider, and another network terminal (slave) is dependent on the master.

Next, after the initialization process is completed, the content is downloaded from the server of the content provider.

Of course, in this case, the content and the authentication file are transmitted together with the server, and the network terminal receives the content and updates the authentication database.

When the authentication database is cleaned as described above, the master transmits the content and the authentication file received from the server to each slave, and the slave itself generates each authentication database.

In this case, the authentication database generated in the network terminal encrypts the authentication type assigned to the song number according to whether the fee is paid by random seed (the code that encrypts the ID and machine key of the cycle) and an XOR operation, and then encrypts the predetermined number of times ( In the embodiment of the present invention is generated through the encryption using the RSA (Rivest, Shamir, Adleman) algorithm).

FIG. 4 is a block diagram showing a schematic configuration of an authentication database generated in each network terminal according to the present invention. The header portion 4a includes contents and a version indicating the authentication database, and a final authentication processing date 4c. ) Is information for limiting late payments and records the month of last payment.

Next, the lowest 100,000-byte authentication area 4e is encrypted and stored with random seed, song number, and song number for each byte, and each block is compressed into 32 bytes by RSA encryption processing. Will form.

Again, 100 32-byte blocks 4d are compressed back into the comprehensive message digester 4b via RSA encryption with the final authentication date.

As such, since each block is connected by RSA encryption, if any one of the blocks is changed, it can be determined whether the authentication database is damaged by the change in the decoding process, and a unique random seed is generated for each terminal (song half cycle). If it is copied to another network terminal, it cannot be decoded and cannot be used.

As described above, the method for controlling playback of digital content of the present invention enables new content to be downloaded and played only when the authorized network terminal of the licensed business is established, and a fee is not paid for the content or the hardware is unauthorized. By limiting the download and playback of content to the changed terminal, it is possible to prevent the use of the stolen terminal and increase the profitability of the content provider.

Claims (44)

Receiving desired digital content and authentication information for determining whether the digital content can be played back; Checking time information for determining whether the received digital content is playable; And, And changing a part of the authentication information based on the identified time information. The method of claim 1, wherein the authentication information, A reproduction control method of digital content, characterized in that it is provided as a separate file separate from the digital content. The method of claim 1, wherein the authentication information, A reproduction control method for digital content, comprising information on an authentication type. The method of claim 1, wherein the time information, And the information on the time of the last authentication processing with respect to the digital content. delete The method of claim 1, wherein the change of the authentication information, A method of controlling reproduction of digital content, characterized in that the type of authentication is changed by changing information on whether reproduction is permitted or information on a playable time. The method of claim 3, wherein the authentication type is Reproduction control method of the digital content, characterized in that it includes a normal authentication that is authenticated on a monthly basis whenever the content fee is paid. The method of claim 7, wherein when the normally authenticated data is corrupted, And restoring authentication for restoring the content up to that point on the basis of the last processed normal authentication date free of charge. The method of claim 7 or 8, wherein the normal authentication or recovery authentication, A reproduction control method for digital content, characterized in that it is permanent authentication without limiting the reproduction period of the content. 8. The method of claim 7, further comprising a temporary authentication that can be played without paying for a predetermined period until the normal authentication is processed. 11. The method of claim 10, wherein when the provisional authentication period expires, the reproduction control method of the digital content is characterized in that it is changed to the expiration authentication that can no longer be played back. The method of claim 1, wherein the authentication information, A reproduction control method for digital content, comprising information on an encryption code. The method of claim 12, wherein the encryption code, And encrypting the authentication type assigned to each digital content by random seed and exclusive OR operation, and then generating the predetermined number of times by encrypting a predetermined number using a predetermined encryption algorithm. The method of claim 13, wherein the random seed, Replay control method for digital content, characterized in that the code encrypting the ID and machine key of the digital content playback device. The method of claim 13, wherein the encryption algorithm, A RSA (Rivest, Shamir, Adleman) algorithm. The method of claim 14, wherein the machine key, And a serial number and a network address of the data storage device of the playback device. Transmitting desired digital content and reproduction request information of the digital content to a server; Receiving authentication information from the server to determine whether to be playable according to the play request information; Identifying time information for determining whether the desired digital content is playable; And changing a part of the authentication information based on the identified time information. The method of claim 17, wherein the authentication information received from the server, And a separate authentication file is additionally transmitted for the content. The method of claim 18, wherein the authentication file, And control information on whether the digital content is permitted to be reproduced and / or the time at which the digital content can be reproduced. The method of claim 19, wherein the time information, And the information on the time of the last authentication processing with respect to the digital content. The method of claim 18, wherein the authentication file, And the normal authentication information authenticated by a predetermined period every time the content fee is paid. The method of claim 18, wherein the authentication file, And restoring authentication information for free restoration of contents up to the previous date based on the last processing normal authentication date when the normal authentication data is damaged. The method of claim 21 or 22, wherein the normal authentication or recovery authentication, A reproduction control method for digital content, characterized in that the permanent authentication for permanently authenticating the reproduction period of the content. The method of claim 18, wherein the authentication file, And provisional authentication information that can be reproduced without paying for a predetermined period until normal authentication is processed. 25. The method of claim 24, wherein when the temporary authentication period expires, it is changed to expiration authentication so that no further playback is possible after that time. The method of claim 18, wherein the authentication file, A reproduction control method for digital content, characterized in that the transmission is encrypted. The method of claim 26, wherein the encryption, And encrypting an authentication type assigned to each digital content by a random seed and an exclusive OR operation, and then generating a predetermined number of encryptions by a predetermined encryption algorithm. 18. The method of claim 17, wherein the information about the network terminal is machine key information. The method of claim 27, wherein the random seed, Replay control method of digital content, characterized in that the code encrypting the ID and machine key of the network terminal. The method of claim 27, wherein the encryption algorithm, A RSA (Rivest, Shamir, Adleman) algorithm. The method of claim 28 or 29, wherein the machine key, A method of controlling reproduction of digital content, comprising: combining an ID of a network terminal, a serial number of the data storage device of the terminal, and a network address. A terminal for receiving desired digital content and authentication information for determining whether the digital content can be reproduced; A management tool for checking the time information for determining whether the received digital content can be played back and for changing a part of the authentication information according to a verification result; And a memory for storing the changed authentication information. The method of claim 32, wherein the authentication information, An apparatus for controlling reproduction of digital content, comprising information on whether to allow reproduction, or information on a time at which reproduction is possible. The method of claim 33, wherein the time information, And the information on the time of the final authentication processing with respect to the digital content. The method of claim 32, wherein the authentication information, Reproduction control device for digital content, characterized in that it includes normal authentication information that is authenticated on a predetermined basis every time the content fee is paid. The method of claim 32, wherein the authentication information, And reconstruction authentication information for free restoration of the contents up to that point on the basis of the last processing normal authentication date when the normal authentication data is damaged. The method of claim 32, wherein the authentication information, And provisional authentication information that can be reproduced without paying for a predetermined period until normal authentication is processed. The method of claim 32 or 37, wherein the management tool, And when the temporary authentication period of the authentication information expires, changing to expiration authentication to prevent further playback after that time. The method of claim 32, wherein the authentication information, Device for controlling reproduction of digital content, characterized in that the transmission is encrypted. The method of claim 39, wherein the encryption, An apparatus for controlling playback of digital content, characterized in that the authentication type assigned to each digital content is encrypted by a random seed and an exclusive OR operation, and then generated by a predetermined number of times by a predetermined encryption algorithm. The method of claim 40, wherein the random seed, The apparatus for controlling playback of digital content, characterized in that the code encrypts the ID and machine key of the terminal to play the content. The method of claim 40, wherein the encryption algorithm, An RSA (Rivest, Shamir, Adleman) algorithm. The method of claim 42, wherein the machine key, An apparatus for controlling reproduction of digital content, comprising: a combination of an ID of a network terminal, a serial number of a data storage device of the terminal, and a network address. The method of claim 3, wherein the information on the authentication type is A reproduction control method of digital content, comprising information on whether to allow reproduction of digital content and information on a time at which reproduction is possible.

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