JP2002073420A - Copyright protection system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a copyright protection system with reduced process loads of terminals and less expensive communication costs, which can distribute and transfer copyrighted data legally and also makes distributors easy to manage the copyright owners. SOLUTION: The copyright protection system has a sever 101 allocated for each terminal, which consists of an encode key memory 104 that stores a key to encode copyrighted data and an encoded contents generator 106 that generates the encoded copyrighted data by encoding the copyrighted data with the encode key. The protection system also has a terminal 102 that consists of an encoded content data memory 112 to store the encoded copyrighted data received from the server 101 through the communication, a decode key memory 113 to store a decode key for decoding the encoded copyrighted data and restoring the original copyrighted data, and a copyrighted data restoration means 111 that restores using the decode key the original copyrighted data in a state of data that can be not to be transferred to the other devices.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to processing of a communication terminal device when distributing copyrighted data to a communication terminal device such as a portable telephone or a personal computer or moving the data to another communication terminal device. The present invention relates to a copyright protection system capable of reducing the amount and communication cost and centrally managing the owner of the data and service contents for each owner.

[0002]

2. Description of the Related Art Content such as images, music, and novels, and computer systems such as hardware and software are valuable products that have been invented by human beings. These products are copyrighted and should be protected from any fraud.

[0003] However, in recent years, since various kinds of contents are digitized, it is easy to copy the same contents, and even if illegally copied contents are distributed without permission, it is necessary to manage all of them. Is getting harder.

Against this background, a conventional method for protecting the copyright of electronic data is disclosed in Japanese Patent Application Laid-Open No. H11-14438.
As disclosed in Japanese Patent Publication No. 0, the digital watermark for preventing unauthorized copying is embedded in data, or the data is given randomness, thereby suppressing unauthorized copying. .

[0005] Second, in the example disclosed in Japanese Patent Publication No. 7-99497, the software uses an encrypted entitlement key which is distributed without entitlement for execution and which is distributed separately. Thus, the software can be executed.

Third, in a known example, an encrypted private key for restoration and restoration is held for each communication terminal device,
By exchanging a publicly available encryption key between communication terminals, it has been configured to be able to transmit and receive encrypted copyrighted data.

[0007]

However, in the conventional apparatus, in the first and second copyright protection methods, the copyrighted data is deleted from the terminal device which is permitted to own the data. However, if the user wants to move to another terminal device, there is a problem that the data distributor needs to perform a procedure of deleting from the original terminal device and then perform a procedure of moving to another terminal device. .

In the first and second copyright protection methods, for example, when a document is created using a copyright-protected image and the document is distributed to friends, a procedure for purchasing a copyright-protected image is used. Is required for the number of friends, and after copying documents for the number of friends, there is a problem in that a work of pasting a copyright-protected image occurs.

In the third copyright protection method, distribution and movement operations can be easily performed. However, since encrypted documents for the number of friends must be created and sent by e-mail or the like, a terminal is required. There is a problem that the processing load on the device is large, the communication fee is high, and it is difficult for the distributor of the distribution to manage the owner of the copyrighted data.

[0010] The present invention has been made in view of the above points, and enables the legal distribution and movement of copyright-protected data to be easily performed, thereby reducing the processing load on the terminal device and reducing the communication fee. It is an object of the present invention to provide a copyright protection system in which a distributor can easily manage the owner of copyrighted data.

[0011]

A copyright protection system according to the present invention comprises: first storage means for storing an encryption key assigned to each communication terminal device for encrypting copyright protected data;
A device having encryption means for encrypting the copyrighted data with the encryption key, a second storage means for storing the encrypted copyrighted data received through communication with the device, A third storage unit for storing a restoration key for restoring the encrypted copyrighted data stored in the storage unit, and transferring the encrypted copyrighted data stored in the second storage unit to another device using the restoration key. A communication terminal device having reproduction means for restoring the original copyright protected data in an unusable state.

[0012] According to this configuration, since the copyrighted data is not directly transmitted and received between the communication terminals, the copyrighted data can be protected from unauthorized use.

[0013] In the copyright protection system of the present invention, in the above-mentioned configuration, the server is configured such that the unique information of the communication terminal device is stored in association with the copyright protection data owned by the communication terminal device under contract. 4 storage means, and when the communication terminal device receives the request for the contract from the communication terminal device, associating the requested copyright protection data with the unique information of the communication terminal device. 4th
And a first control means for storing in the storage means.

[0014] According to this configuration, a distributor or the like distributing the copyrighted data can centrally manage the location of the copyrighted data.

In the copyright protection system according to the present invention, the first control means, when receiving a request for distributing the copyright protection data owned by the communication terminal device to another communication terminal device, Receiving the distribution destination data from the source communication terminal device, authenticating the received data to the communication terminal device, distributing the encrypted copyrighted data, and changing the ownership of the copyrighted data stored in the fourth storage means to the A configuration for changing to the distribution destination communication terminal device is adopted.

According to this configuration, by performing the procedure for distributing the copyrighted data via the server, the processing load and communication fee applied to the communication terminal device can be suppressed.

In the copyright protection system according to the present invention, when the first control means receives a request to move the copyright protection data owned by the communication terminal device to another communication terminal device, the first control means transmits the request. The destination data is received from the source communication terminal device, and after authenticating the received data to the communication terminal device, the encrypted copyrighted data is sent, and the ownership of the copyrighted data stored in the fourth storage means is changed to the above. The configuration is changed to the destination communication terminal device, and an instruction to delete the encrypted copyright protection data stored in the second storage means is transmitted to the requesting communication terminal device.

According to this configuration, by performing the procedure for moving the copyright-protected data through the server, the processing load and communication fee applied to the communication terminal device can be reduced. Also, the encrypted copyright protection data stored in the requesting communication terminal device corresponding to the moved copyright protection data can be automatically deleted.

[0019] In the copyright protection system according to the present invention, the communication terminal device includes the second control means for uploading new data created by using the copyright protection data reproduced by the reproduction means to the server. The server employs a configuration including a fifth storage unit that stores the uploaded new data as copyright protection data.

According to this configuration, new data created using the copyright protection data downloaded from the server by the communication terminal device can be stored in the server as copyright protection data.

In the copyright protection system according to the present invention, in the above-mentioned configuration, the second control means uploads new data created by the own communication terminal device to a server, and the server copies the uploaded new data to a copyright. A configuration in which the protection data is stored in the fifth storage unit is adopted.

According to this configuration, the new data created by the communication terminal device can be stored in the server as copyright protection data.

The mobile station apparatus of the present invention employs a configuration having the function of a communication terminal apparatus of a copyright protection system having the same configuration as any of the above.

According to this configuration, in the mobile station device,
The same operation and effect as any of the above can be obtained.

[0025]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 is a block diagram showing a configuration of a copyright protection system according to an embodiment of the present invention.

The copyright protection system 100 shown in FIG.
Comprises a server 101 and a terminal device 102. However, the server 101 is owned by a company or the like that manages copyright protection data, and is mounted or connected to a base station device in a mobile communication system, or connected to a wired network.

The terminal device 102 is owned by the user, and is a mobile station device such as a mobile phone in a mobile communication system or a communication terminal device such as a personal computer connected to a wired line.

The server 101 includes a copyright protection data storage unit 103, an encoding key storage unit 104, a proprietary information storage unit 105, and an encrypted content generation unit 106
, A control unit 107 and a communication unit 108.

The terminal device 102 includes a communication unit 109, a control unit 110, a copyright protected data reproducing unit 111,
It comprises an encrypted content information storage means 112 and a decode key storage means 113.

The copyright protection data storage means 103 stores copyright protection data.

The encoding key storage unit 104 stores a key (encryption key) for encrypting the copyright protection data stored in the storage unit 103 for each copyright protection data.

The ownership information storage means 105 stores the ID of the terminal device 102 which owns the copyright protection data and the ownership information which is the type of the copyright protection data owned.

The encrypted content generation means 106 stores the copyright protection data stored in the storage means 103 in the storage means 1
The encrypted copyright protected data is generated by encrypting the data with the encryption key stored in the file 04.

The control means 107 stores the ownership information storage means 1
The control for determining whether to distribute the copyright protection data based on the information stored in the terminal 05 and the password notified from the terminal device 102, and the control of the entire server 101.

The communication means 108 and 109 are connected to the server 101
And data transmission / reception between the terminal device 102 and, for example, transmission / reception of encrypted copyright protection data and a password.

The control means 110 controls the data and commands received via the communication means 109 and controls the entire terminal device 102.

The encrypted content information storage means 112
The encrypted copyright protection data received from the server 101 is stored.

The decoding key storage unit 113 stores the storage unit 1
12 stores a key (restoration key) for restoring the encrypted copyrighted data stored in the storage unit 12.

The copyright protected data reproducing means 111 reproduces the original copyright protected data by restoring the encrypted copyright protected data stored in the storage means 112 with the restoration key stored in the storage means 113. Things.

The operation of the copyright protection system having such a configuration will be described.

First, the user uses the terminal device 102 to copy, for example, copyright-protected music content to the server 1.
The operation when purchasing from 01 will be described.

First, a user who requests distribution of copyrighted data accesses the server 101 from the terminal device 102 and performs a purchase procedure. Server 101 that received this procedure
Then, in the control means 107, the number of purchases of the copyrighted data and the data purchase source terminal device 102
An instruction command for causing the terminal device 102 to display on the terminal device 102 a message prompting the user to input the number of items to be stored and the payment method is generated.
This instruction command is transmitted to the terminal device 102 by the communication unit 108.

In the terminal device 102 which has received the instruction command by the communication means 109, the content which prompts the input of the number of purchases, the number of storages and the payment method is displayed on a display (not shown) by the control of the control means 110 in accordance with the instruction command. Is displayed.

Here, when the user inputs the number of purchases, the number of storages, and the payment method on the terminal device 102, the input data is transmitted by the communication means 10 under the control of the control means 110.
9 to the server 101.

In the server 101 that has received the input data via the communication means 108, the input data is stored in the ownership information storage means 105 under the control of the control means 107.

Here, if the input data has one or more stored numbers, the control of the control means 107 causes the proprietary information storage means 105 to store the copyrighted data of the purchased number in the proprietary terminal device 102. The purchaser's terminal device 102 is stored and owned by the purchaser terminal device 102 along with the ID of the purchaser terminal device 102 and the type of the purchased copyright protection data.

After the storage, the control unit 107 outputs an instruction to generate encrypted copyrighted data to the encrypted content generation unit 106. Generation means 10 receiving this instruction
In step 6, the copyrighted data corresponding to the number of storages stored in the storage unit 103 is encrypted with the encryption key stored in the storage unit 104 to generate encrypted copyrighted data.

After this generation, an instruction to download the encrypted copyrighted data under the control of the control means 107 is sent to the terminal device 102 via the communication means 108.

In the terminal device 102 receiving the notified instruction via the communication means 109, the encrypted copyright protection data is downloaded from the server 101 under the control of the control means 110, and the encrypted content information storage means 11
2 is stored.

The stored encrypted copyrighted data is restored by the copyrighted data reproducing means 111 according to the reproduction instruction control of the control means 110 with the restoration key stored in the storage means 113. By this restoration, the original copyright protected data is reproduced.

Next, the operation of distributing the copyright protection data purchased by the user through the terminal device 102 to another user terminal device (not shown) will be described.

The user inputs the distribution instruction and the e-mail address of the distribution destination terminal device at the terminal device 102. After this input, a distribution instruction and an e-mail address are transmitted to the server 101 via the communication unit 109 under the control of the control unit 110.

In the server 101 which has received the distribution instruction and the e-mail address via the communication means 108, under the control of the control means 107, a randomly generated password and the server 101 are transmitted to the distribution destination terminal device of the e-mail address. E-mail address (server address) is sent. At this time, a message to the effect that the copyright protection data is distributed from the purchase source terminal device 102 is attached.

When the server 101 is accessed from the distribution destination terminal device that has received the e-mail, the server 10
An instruction to input the e-mail address and password of the distribution destination terminal device is returned from 1.

When the distribution destination user executes the input in response to the instruction, the server 101 checks by collation control of the control means 107 whether the input e-mail address and password are correct.

As a result, if correct, under the control of the control means 107, the encryption key dedicated to the distribution destination is read out from the encoding key storage means 104, and the copyright protection stored in the storage means 103 using the encryption key is read. A data encryption instruction is issued to the encrypted content generation unit 106.

When the encrypted copyright protected data is generated by the encrypted content generating means 106 in accordance with the instruction, under the control of the control means 107, an instruction to download the encrypted copyright protected data is transmitted via the communication means 108. To the distribution destination terminal device. At the same time, the owner of the distribution copyright protection data stored in the ownership information storage means 105 is changed to the distribution destination terminal device.

Next, the operation when the user moves the copyright protected data (encrypted copyright protected data) stored in the terminal device 102 to another user terminal device will be described.

The user inputs the movement instruction and the e-mail address of the destination terminal device at the terminal device 102. After this input, a movement instruction and an e-mail address are transmitted to the server 101 via the communication means 109 under the control of the control means 110.

In the server 101 which has received the transfer instruction and the e-mail address via the communication means 108, under the control of the control means 107, a randomly generated password and server address are transmitted to the destination terminal device of the e-mail address. Is sent. At this time, a message to the effect that the copyright protection data is to be transferred from the purchaser terminal device 102 is attached.

When the distribution destination terminal device that has received the e-mail accesses the server 101, the server 10
An instruction to input the e-mail address and password of the destination terminal device is returned from 1.

When the distribution destination user executes the input in response to the instruction, the server 101 checks by collation control of the control means 107 whether the input e-mail address and password are correct.

As a result, if it is correct, under the control of the control means 107, the encryption key dedicated to the distribution destination is read out from the encoding key storage means 104, and the copyright protection stored in the storage means 103 using this encryption key is read. A data encryption instruction is issued to the encrypted content generation unit 106.

When the encrypted copyright protected data is generated by the encrypted content generating means 106 in accordance with the instruction, under the control of the control means 107, an instruction to download the encrypted copyright protected data is transmitted via the communication means 108. Transmitted to the destination terminal device.

At the same time, the owner of the mobile copyright protection data stored in the ownership information storage means 105 is changed to the destination terminal device, and the encrypted copyright protection data corresponding to the mobile copyright protection data is encrypted. Content information storage means 1
12 is transmitted to the purchase source terminal device 102.

In the purchaser terminal device 102, the control means 10
The encrypted copyright protected data stored in the storage unit 112 is deleted by the control in accordance with the deletion instruction of No. 7.

Next, using the copyrighted data (encrypted copyrighted data) stored in the terminal device 102, the user creates new self-made data for which copyright protection is desired.
The operation when the self-made data is registered in the server 101 as a copyright will be described.

At the terminal device 102, the user reproduces the encrypted copyrighted data stored in the encrypted content information storage means 112 by the copyright protected data reproducing means 111, and creates his / her own data using the reproduced data. .

Then, an instruction to register the copyright of the self-made data is input. Under the control of the control unit 110 in response to the instruction, the self-made data is transmitted to the server 101 together with the instruction. In the server 101, the self-produced data is stored in the copyright protected data storage unit 103 under the control of the control unit 107 according to the copyright registration instruction. This storage means 1
The data stored in 03 is automatically registered for copyright.

It is also possible to register the copyright of the user's original self-produced data that does not use the encrypted copyrighted data in the same manner as described above.

As described above, according to the copyright protection system 100 of the embodiment, the server 101 is assigned to each terminal device, and the encoding key storage means 104 stores the encryption key for encrypting the copyright protection data. And encrypted content generating means 1 for generating encrypted copyrighted data by encrypting the copyrighted data with the encryption key.
06.

Further, the terminal device 102 is provided with an encrypted content information storage unit 112 for storing the encrypted copyrighted data received through the communication with the server 101, and a restoration key for restoring the encrypted copyrighted data. It comprises decoding key storage means 113 for storing, and copyright protected data reproducing means 111 for restoring the encrypted copyright protected data to the original copyright protected data in a state where transfer to another device is impossible using the recovery key. .

Thus, since the copyrighted data is not directly transmitted and received between the terminal devices, it is possible to protect the copyrighted data from being used without permission.

When the server 101 receives a request to purchase copyright protected data from the terminal device 102, the terminal device 102 owns the requested copyright protected data under the control of the control unit 107. To the terminal device 102
And stored in the proprietary information storage unit 105 in association with the ID.

Thus, a distributor or the like distributing copyright protected data can centrally manage the location of the copyright protected data.

Further, when the server 101 receives a request by the control means 107 to distribute the copyright protection data owned by the terminal device 102 to another terminal device, the server 101 changes the distribution destination address from the requesting terminal device 102. After receiving the password and transmitting the password to the terminal device having this reception address, when receiving the same password as the transmitted one from the distribution destination terminal device, the ownership of the copyright protection data stored in the ownership information storage unit 105 is changed. Changed to the distribution destination terminal device.

Thus, by performing the procedure for distributing the copyrighted data via the server 101, the processing load and the communication fee applied to the terminal device can be suppressed.

When the server 101 receives a request by the control means 107 to move the copyrighted data owned by the terminal device 102 to another terminal device, the server 101 receives the destination address from the requesting terminal device. Then, after transmitting the password to the terminal device having the reception address, when receiving the same password as the transmitted one from the destination terminal device, the ownership of the copyright protection data stored in the ownership information storage unit 105 is transferred. Change to the destination terminal device, and
2, an instruction to delete the encrypted copyright protection data stored in the encrypted content information storage unit 112 is transmitted.

Thus, by performing the procedure for moving the copyright protected data through the server 101, the processing load and communication charges applied to the terminal device can be reduced. Also, the encrypted copyright protection data stored in the request source terminal device corresponding to the moved copyright protection data can be automatically deleted.

Further, the terminal device 102
Uploads new data created using the restored copyright protected data to the server 101, and the server 101 uses the uploaded new data as copyright protected data as the copyright protected data storage unit 10.
3 was stored.

Thus, the server 1 is connected to the terminal device 102.
New data created using the copyright protected data downloaded from the server 1 as copyright protected data.
01 can be stored.

Also, the terminal device 102
Uploads the new data created by the own terminal device 102 to the server 101,
Stores the uploaded new data in the copyright protection data storage unit 103 as copyright protection data.

Thus, the new data created by the terminal device 102 can be stored in the server 101 as copyright protection data.

[0085]

As described above, according to the present invention,
Legal distribution and transfer of copyrighted data can be easily performed, the processing load on the terminal device can be reduced and the communication fee can be reduced, and the distribution source can easily identify the owner of the copyrighted data. Can be managed.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a copyright protection system according to an embodiment of the present invention.

[Explanation of symbols]

 101 server 102 terminal device 103 copyright protected data storage means 104 encoding key storage means 105 ownership information storage means 106 encrypted content generation means 107, 110 control means 108, 109 communication means 111 copyright protected data reproduction means 112 encrypted content Information storage means 113 Decode key storage means

Claims (7)

[Claims] A first storage unit that is assigned to each communication terminal device and stores an encryption key for encrypting copyright protected data; and an encryption unit that encrypts the copyright protected data with the encryption key. A second storage means for storing the encrypted copyrighted data received by communication with the server, and a restoration key for restoring the encrypted copyrighted data stored in the means. And a reproducing unit for restoring the encrypted copyrighted data stored in the second storage unit to the original copyrighted data in a state where transfer to another device is impossible using the restoration key. A copyright protection system comprising: a communication terminal device. 2. The communication apparatus according to claim 1, wherein the server is configured to store, in association with each piece of copyright protection data owned by the communication terminal apparatus, unique information of the communication terminal apparatus, First control means for storing in the fourth storage means that the requested copyright protection data is owned by the communication terminal device when the request for the contract is received, in association with the unique information of the communication terminal device The copyright protection system according to claim 1, comprising: 3. When receiving a request to distribute copyright protected data owned by a communication terminal device to another communication terminal device, the first control means receives distribution destination data from the requesting communication terminal device. After authenticating the received data to the communication terminal device,
3. The copyright protection system according to claim 2, wherein the encrypted copyright protection data is distributed, and the ownership of the copyright protection data stored in the fourth storage means is changed to the destination communication terminal device. 4. When receiving a request to move copyright protected data owned by a communication terminal device to another communication terminal device, the first control means receives destination data from the requesting communication terminal device. After authenticating the received data to the communication terminal device,
The encrypted copyrighted data is sent, the ownership of the copyrighted data stored in the fourth storage is changed to the destination communication terminal, and the copyrighted data is stored in the requesting communication terminal in the second storage. 4. The copyright protection system according to claim 2, wherein an instruction to delete the encrypted copyrighted data is transmitted. 5. The communication terminal device includes a second control unit for uploading new data created using the copyright protected data reproduced by the reproduction unit to a server, wherein the server includes the new data uploaded. The copyright protection system according to any one of claims 1 to 4, further comprising a fifth storage unit for storing the copyright protection data as copyright protection data. 6. The second control means uploads new data created by the own communication terminal device to a server, and the server stores the uploaded new data as copyright protection data in a fifth storage means. The copyright protection system according to any one of claims 1 to 4, wherein: 7. A mobile station device having the function of a communication terminal device of the copyright protection system according to any one of claims 1 to 6.