JPWO2011090081A1 - Information processing apparatus, program, and recording medium recording the program - Google Patents

Abstract

In order to realize an information processing apparatus that can reduce the risk of leakage of recorded information, the optical disc apparatus (1) according to the present invention is capable of additionally recording information or rewriting information. An information processing apparatus capable of recording and reproducing with respect to the hybrid disc (10) provided with L2), and storing the application data created by executing the application program recorded on the hybrid disc (10) A storage destination restriction unit (61) that restricts only the RE layer (L2) is provided. Thereby, it is possible to prevent information leakage due to the application data being stored in the HDD of the PC.

Description

  The present invention relates to a technique for restricting storage destinations of data created by an application program.

  In recent years, the need for a small and lightweight personal computer (PC) has increased, and small sized notebook PCs called “netbooks” have been released by various manufacturers and have spread to many users. These PCs are characterized by the premise of using network resources in order to reduce costs by minimizing CPU processing capacity and storage media capacity and to compensate for these disadvantages. . For example, instead of using a network storage for storing large data or running a service on a PC instead of running an application on a PC, the PC can be used comfortably even if its capacity as a PC is low.

  There is a system called “Thin Client System” that further advances this concept. In a thin client system, multiple clients are connected to the server, and the client used by the user has only the minimum functions such as input and display, and data created by the application (hereinafter referred to as “application data”). Such resources are collectively managed by the server. Therefore, the user can use the same application and application data from different clients, and there is an advantage that it is not necessary to physically carry the computer.

  As described above, a netbook or a thin client system is characterized in that a computer that is physically carried can be reduced in size and weight by utilizing resources on the network, or the computer can be made unnecessary to carry. For this reason, naturally, resources such as applications and application data cannot be used in a place without network infrastructure.

  In contrast, by using an optical disc (hybrid disc) having a non-rewritable layer (ROM layer) and a rewritable layer (RE layer) as a PC storage medium, it is not connected to a network, A technique that enables applications and application data to be used even in a PC that does not have a hard disk drive (HDD) has been proposed (for example, Patent Document 1).

  Specifically, an OS (operating system) and application that can be operated by a general-purpose PC are recorded in the ROM layer of the hybrid disk. For example, when a hybrid disk having a BD drive is read into a PC that can read a hybrid disk and the hybrid disk is inserted into the optical disk drive and the PC is activated, the OS and applications recorded in the ROM layer of the hybrid disk are activated. Data created by the application can be stored in the RE layer of the hybrid disc. Even when the environment setting is changed, the changed content is stored in the RE layer of the hybrid disc.

  When the hybrid disk is taken out from the PC and inserted into another PC and the other PC is activated, the OS and application recorded in the ROM layer of the hybrid disk are similarly activated. Also, other PCs can read application data and environment settings stored in the RE layer. Thus, the user can use the same application and application data on different PCs by carrying the hybrid disk, and can use it without any problem even in a place without network infrastructure. Further, since it is not necessary to provide an HDD in the PC, it is possible to realize a reduction in size and weight of the PC.

  Further, in Patent Document 1, when a hybrid disk is inserted into an optical disk drive and the PC is started, a screen for inputting a password or the like is displayed, and whether the user who uses the hybrid disk is a valid user. A configuration for authenticating whether or not is disclosed. Thereby, the security of the information recorded on the hybrid disc can be enhanced.

Japanese Patent Publication “JP 2009-193633 A (published on August 27, 2009)”

  However, in the configuration described in Patent Document 1, for example, when a hybrid disk is used in a PC having an HDD, when a user saves application data in the HDD or the like, application data is stored when a third party uses the PC. May leak.

  The present invention has been made to solve the above problems, and an object of the present invention is to realize an information processing apparatus that can reduce the risk of leakage of recorded information.

  In order to solve the above-described problem, an information processing apparatus according to the present invention includes a first information recording layer that can only read information, and a first information recording layer that can additionally record information or that can rewrite information. An information processing apparatus capable of recording and reproducing with respect to an optical recording medium in which an application program is stored in the first information recording layer, and is created by executing the application program The present invention is characterized by comprising storage destination restriction means for restricting the application data storage destination to only the second information recording layer.

  According to the above configuration, since the storage destination of application data is limited only to the second information recording layer by the storage destination restriction unit, the application data cannot be stored in the HDD of the information processing apparatus or the storage on the network. As a result, it is possible to prevent information leakage due to the user saving application data in the HDD of the PC, which is particularly suitable when it is desired to always store highly confidential data only on an optical recording medium. It is. Therefore, an information processing apparatus that can reduce the risk of leakage of recorded information can be realized.

  As described above, the information processing apparatus according to the present invention includes the first information recording layer that can only read information, and the second information recording layer that can additionally record information or that can rewrite information. An information processing apparatus capable of recording and reproducing an optical recording medium in which an application program is stored in the first information recording layer, and storing application data created by executing the application program Since the storage destination restricting means for restricting the destination only to the second information recording layer is provided, there is an effect that the risk of leakage of recorded information can be reduced.

1 is a block diagram showing a configuration of an optical disc device according to a first embodiment of the present invention. It is a figure which shows the structural example of each recording layer of the hybrid disc which concerns on the 1st Embodiment of this invention. It is a figure which shows the window screen for performing the preservation | save process of application data. (A) is a figure which shows the state which changed the preservation | save destination to "desktop" in the window screen shown in FIG. 3, (b) is a figure which shows the error screen displayed when a preservation | save process is not performed. is there. It is a block diagram which shows the structure of the optical disk apparatus based on the 2nd Embodiment of this invention. It is a figure which shows the structural example of each recording layer of the hybrid disc which concerns on the 2nd Embodiment of this invention.

Embodiment 1
The following describes the first embodiment of the present invention with reference to FIGS.

(Configuration of optical disc apparatus 1)
FIG. 1 is a block diagram showing a configuration of an optical disc apparatus (information processing apparatus) 1 according to the present embodiment. The optical disc apparatus 1 includes a main body 2, a display 3, and an input device 4. The display 3 displays video based on video data output from the main body 2 via the video output unit 7, and for example, a liquid crystal display is preferably used. The input device 4 is a device for a user to give an input instruction to the main body 2 via the I / O control unit 8, and for example, a keyboard or a mouse is used.

  The main body 2 includes a Blu-ray disc (BD) drive 5 and an arithmetic processing unit 6. The BD drive 5 has a function of reading information from a hybrid disk (optical recording medium) 10 inserted into the main body 2 and recording information on the hybrid disk 10. The BD drive 5 is provided with an optical pickup device (not shown). Information is read from and recorded on the hybrid disc 10 by irradiating a track of the hybrid disc 10 with a laser beam from an optical head of the optical pickup device. .

  As shown in FIG. 2, the hybrid disc 10 includes a ROM layer (first information recording layer) L1 that can only read information, and an RE layer that can additionally record information or can rewrite information. (Second information recording layer) L2. As will be described later, various application programs are recorded in the ROM layer L1, and application data created by the application program is recorded in the RE layer L2.

  The arithmetic processing unit 6 is a functional block having a function of executing an application program stored in a hard disk drive (HDD) (not shown) or an application program recorded in the hybrid disk 10. In addition, the arithmetic processing unit 6 has a function of giving an instruction to the BD drive 5 to perform playback control and recording control for the hybrid disc 10 via the interface unit 9. Further, in the present embodiment, application data created by the arithmetic processing unit 6 executing the application program recorded on the hybrid disc 10 can be recorded only in the RE layer. In order to realize this function, the arithmetic processing unit 6 includes a storage destination restriction unit (storage destination restriction unit) 61. The storage destination restriction unit 61 is a functional block realized by executing a storage destination restriction program stored in an HDD (not shown). The storage destination restriction program is a program that is automatically executed when the optical disk device 1 is started. Hereinafter, the function of the storage destination restriction unit 61 will be specifically described.

(Application data storage destination restriction)
First, when the optical disk device 1 is activated, a storage destination restriction program is executed along with the activation of the OS stored in the HDD, and a storage destination restriction unit 61 is formed in the arithmetic processing unit 6. Subsequently, when the hybrid disk 10 is inserted into the BD drive 5 and one of the application programs recorded on the hybrid disk 10 is executed by an instruction from the input device 4 or the like, the executed application program is read from the hybrid disk 10. It is read out to a memory (not shown). Subsequently, when application program data is created by the user's input operation and an instruction to save the application data is given, the save destination restriction unit 61 executes the application program being operated by being read from the hybrid disk 10 to the memory. It is determined whether or not the program is being executed.

  As a result, when it is determined that the application program being operated is a program being executed by being read from the hybrid disk 10 into the memory, the window screen 20 shown in FIG. 3 is displayed. In this window screen 20, “BD drive (D :)” indicating the RE layer L <b> 2 of the hybrid disk 10 is displayed by default in a storage destination designation field 21 for designating a storage destination of application data. The user can store the created application data in the RE layer L2 of the hybrid disk 10 by designating a desired storage destination, file name, and file type and selecting the “Save” button 22.

  Here, as shown in FIG. 4A, when the user designates “Desktop” which is the storage area of the HDD as the storage location of the application data and selects the “Save” button 22, the storage destination restriction unit 61 Then, the execution of the saving process is stopped, and instead, the error screen 30 shown in FIG. Thus, since application data created by the application program of the hybrid disk 10 can be stored only in the RE layer L2 of the hybrid disk 10, the risk of leakage of application data can be reduced. Note that the storage destination designation field 21 of the window screen 20 may not be changed with the default display of “BD drive (D :)”. Further, when the arithmetic processing unit 6 is executing an application program other than the application program recorded on the hybrid disk 10, the application data created by the application program is stored in the RE layer L 2 of the hybrid disk 10. It is not limited.

(Summary)
As described above, since the storage destination of the application data is restricted only to the RE layer L2 by the storage destination restriction unit 61, the application data cannot be stored in the HDD or the like. Therefore, it is possible to prevent the user of the hybrid disk 10 from saving application data in the HDD or the like and leaking information.

  The storage destination restriction unit 61 of the optical disc apparatus 1 may be configured by hardware logic, or may be realized by software using a CPU as follows.

  That is, the optical disc apparatus 1 includes a CPU (central processing unit) that executes instructions of a storage destination restriction program for realizing a storage destination restriction function, a ROM (read only memory) that stores the storage destination restriction program, and the storage destination restriction program. And a storage device (recording medium) such as a memory for storing the storage destination restriction program and various data. An object of the present invention is a recording medium in which a program code (execution format program, intermediate code program, source program) of a storage destination restriction program of the optical disc apparatus 1 which is software that realizes the above-described functions is recorded in a computer-readable manner. Can also be achieved by reading the program code recorded on the recording medium and executing it by the computer (or CPU or MPU).

  Examples of the recording medium include a tape system such as a magnetic tape and a cassette tape, a magnetic disk such as a floppy (registered trademark) disk / hard disk, and an optical disk such as a CD-ROM / MO / MD / DVD / CD-R. Card system such as IC card, IC card (including memory card) / optical card, or semiconductor memory system such as mask ROM / EPROM / EEPROM / flash ROM.

  Further, the optical disc apparatus 1 may be configured to be connectable to a communication network, and the program code may be supplied via the communication network. The communication network is not particularly limited. For example, the Internet, intranet, extranet, LAN, ISDN, VAN, CATV communication network, virtual private network, telephone line network, mobile communication network, satellite communication A net or the like is available. Also, the transmission medium constituting the communication network is not particularly limited. For example, even in the case of wired such as IEEE 1394, USB, power line carrier, cable TV line, telephone line, ADSL line, etc., infrared rays such as IrDA and remote control, Bluetooth ( (Registered trademark), 802.11 wireless, HDR, mobile phone network, satellite line, terrestrial digital network, and the like can also be used. The present invention can also be realized in the form of a computer data signal embedded in a carrier wave in which the program code is embodied by electronic transmission.

[Embodiment 2]
The second embodiment of the present invention will be described below with reference to FIGS. For convenience of explanation, members having the same functions as those described in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

(Configuration of optical disc apparatus 1a)
FIG. 5 is a block diagram showing a configuration of the optical disc apparatus 1a according to the present embodiment. The optical disc apparatus 1 includes a main body 2a, a display 3, and an input device 4. The main body 2 a includes a Blu-ray disc (BD) drive 5 and a host unit 11. The configuration of the BD drive 5 is the same as that shown in FIG. 1, but in this embodiment, a hybrid disc 10a is inserted in the BD drive 5 instead of the hybrid disc 10 shown in FIG.

  Like the hybrid disk 10, the hybrid disk 10a includes a ROM layer L1 that can only read information and an RE layer L2 that can additionally record information or that can rewrite information. In the ROM layer L1, in addition to various application programs, an OS that operates on the optical disc apparatus 1a is recorded.

  The host unit 11 also has a function of giving instructions to the BD drive 5 to perform playback control and recording control for the hybrid disc 10a via the interface unit 9, and includes the chipset 12, the system memory 13 and the CPU 14. It has. The chip set 12 is a chip on which peripheral circuits of the CPU 14 are mounted. The CPU 14 reads data from the hybrid disk 10 a and develops it in the system memory 13, reads in sequence the instruction sequence of the application program recorded on the hybrid disk 10 a in order, and performs arithmetic processing on the data developed in the system memory 13.

  As described above, the main body 2a of the optical disc apparatus 1a is not provided with the HDD provided in the general-purpose PC, thereby realizing a reduction in size and weight of the optical disc apparatus 1a. In the present embodiment, application data created by the application program is stored in a predetermined recording area of the hybrid disc 10a.

(Configuration of hybrid disk 10a)
Next, the configuration of the hybrid disk 10a will be described.

  FIG. 6 is a diagram showing a configuration example of each recording layer of the hybrid disc 10a. As described above, the hybrid disk 10a includes the ROM layer L1 that can only read information and the RE layer L2 that can additionally record information or rewrite information. The ROM layer L1 is a recording layer that stores the OS and application programs that run on the OS. The RE layer is a recording layer that stores application data created by an application program.

  As the OS, WINDOWS (registered trademark), OS / 2, UNIX (registered trademark), LINUX, MS-DOS, Mac-OS, and the like can be used. In this embodiment, WINDOWS (registered trademark) is used. An example will be described. In addition, the programs constituting the OS include a user authentication program, a storage destination restriction program, and an encryption program. The storage destination restriction program is the same as the storage destination restriction program described in the first embodiment.

(User authentication)
The user authentication program includes a user ID and a password for authenticating a user who uses the hybrid disk 10a. When the hybrid disk 10a is inserted into the main body 2, the user authentication unit (user authentication means) is formed in the host unit 11 by the CPU 14 reading the user authentication program. As a result, a screen for inputting the user ID and password is displayed, and when the information input by the user matches the preset authentication information, the CPU 14 reads the OS program from the hybrid disk 10a, and the OS Starts.

(Application data storage destination restriction)
As described in the first embodiment, the storage destination restriction program is data for restricting the storage destination of application data to only the RE layer L2. Therefore, since the application data cannot be stored in the HDD or the like by executing the program, it is possible to prevent the user of the hybrid disk 10a from accidentally saving the application data in the HDD or the like and leaking information. .

  Furthermore, in the present embodiment, since the storage destination restriction program is recorded on the hybrid disk 10a, the storage destination restriction program can be executed even on a PC in which the storage destination restriction program is not installed. Therefore, even if the hybrid disk 10a is stolen by a third party, the third party can move the information recorded on the hybrid disk 10a to another storage medium such as an HDD or a USB memory. Since it becomes impossible, the risk of information leakage can be further reduced.

  Note that the specific contents of the processing for restricting the storage destination of application data are substantially the same as those in the first embodiment, and a description thereof will be omitted.

(Encryption of application data)
In the present embodiment, the application data is encrypted and saved when the application data saving process is executed. This is realized by the CPU 14 reading the encryption program stored in the ROM layer L1 of the hybrid disk 10a and forming the encryption unit (encryption means) in the host unit 11. As a result, when a third party uses the hybrid disk 10a, even if the application data is accessed, it is not displayed normally due to garbled characters, etc., so that the contents of the application data cannot be viewed by a third party. be able to. Therefore, the risk of information leakage can be further reduced.

  Further, in the present embodiment, AACS (Advanced Access Content System) is used as an application data encryption method. Since the AACS encryption method is a technology for protecting the copyright of the content of an optical disc such as a Blu-ray disc or DVD, it is suitable for encryption in storing data in the RE layer L2.

  The decryption key for decrypting the encrypted application data may be recorded on the RE layer L2 of the hybrid disk 10a, but may be recorded on a recording medium (for example, a USB memory) different from the hybrid disk 10a. desirable.

(Summary)
As described above, in this embodiment, the hybrid disk 10 includes the read-only ROM layer L1 and the rewritable RE layer L2, and the ROM layer L1 includes the OS and an application program that operates on the OS. Are stored, and a storage destination restriction program that restricts the storage destination of application data to only the RE layer L2 is recorded. Therefore, the user can use the hybrid disc 10 in various environments, and can reduce the risk of leakage of information recorded on the hybrid disc 10. Furthermore, since an encryption program for encrypting application data and storing it in the RE layer L2 is recorded on the hybrid disk 10, even if a third party uses the hybrid disk 10, It is possible to prevent a user from browsing the contents of application data.

  In the present embodiment, the storage destination restriction program stored in the ROM layer L1 is included in the program constituting the OS, but each application program may include the storage destination restriction program. Similarly, the encryption program may be configured such that each application program includes the encryption program.

  If the CPU 14 can read the application data when it is stored, the storage destination restriction program and the encryption program may be independent application programs. In this case, the storage destination restriction program and the encryption program are preferably stored in the ROM layer L1. Since the ROM layer L1 is a read-only recording layer, falsification of the storage destination restriction program and the encryption program can be prevented.

  The hybrid disk 10 according to the present embodiment is a multi-layer disk having a two-layer structure, but may have three or more layers as long as it is a multi-layer disk having a ROM layer and an RE layer.

(Summary of embodiment)
The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope shown in the claims. That is, embodiments obtained by combining technical means appropriately modified within the scope of the claims are also included in the technical scope of the present invention.

  The information processing apparatus according to the present invention preferably includes an encryption unit that encrypts and stores the application data when executing the storage process of the application data.

  The information processing apparatus according to the present invention preferably includes user authentication means for authenticating a user who uses the optical recording medium.

  The program according to the present invention is a program that causes a computer to operate as each unit of the information processing apparatus. The program is recorded on a computer-readable recording medium.

  The recording medium is the optical recording medium, and the program is preferably stored in the first information recording layer.

  The present invention is particularly applicable to an optical disc apparatus capable of recording / reproducing with respect to a hybrid disc having a ROM layer and an RE layer.

1 Optical disk device (information processing device)
1a Optical disk device (information processing device)
2 Main unit 2a Main unit 3 Display 4 Input device 5 BD drive 6 Arithmetic processing unit 7 Video output unit 8 I / O control unit 9 Interface unit 10 Hybrid disc (optical recording medium)
10a Hybrid disc (optical recording medium)
11 Host unit 12 Chipset 13 System memory 14 CPU
20 Window screen 30 Error screen 61 Save destination restriction section (Save destination restriction means)
L1 ROM layer (first information recording layer)
L2 RE layer (second information recording layer)

Claims (6)

A first information recording layer that can only read information; and a second information recording layer that can additionally record information or that can rewrite information. The first information recording layer includes an application program Is an information processing apparatus capable of recording and reproduction with respect to an optical recording medium in which is stored,
An information processing apparatus comprising: a storage destination limiting unit that limits a storage destination of application data created by executing the application program to only the second information recording layer.   The information processing apparatus according to claim 1, further comprising: an encryption unit that encrypts and stores the application data when executing the storage process of the application data.   The information processing apparatus according to claim 1, further comprising: a user authentication unit that authenticates a user who uses the optical recording medium.   The program which operates a computer as each means of the information processing apparatus of any one of Claims 1-3.   The computer-readable recording medium which recorded the program of Claim 4. The recording medium is the optical recording medium,
6. The recording medium according to claim 5, wherein the program is stored in the first information recording layer.

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