DATA ENCODING APPARATUS, DATA ENCODING METHOD, DATA ENCODING PROGRAM, AND RECORDING MEDIUM

• US 20070206788A1
• Filed: 02/06/2007
• Published: 09/06/2007
• Est. Priority Date: 02/10/2006
• Status: Active Grant

• Current Assignee: Ricoh Company Limited
• Original Assignee: Ricoh Company Limited
• Inventors: Morita, Naoya, HAGIWARA, Atsushi
• Granted Patent: US 8,842,825 B2
• Time in Patent Office: Days
• US Class Current: 380/37
• CPC Class Codes: G06F 21/80 in storage media based on magnetic or optical technology, e.g. disks with sectors preventing unauthorised reproduction or copying of disc-type recordable media G11B20/00
• CPC Class Codes: G06F 21/85 interconnection devices, e.g. bus-connected or in-line devices
• CPC Class Codes: G06F 2221/2107 File encryption

Abstract

A disclosed data encoding apparatus includes: an arbitrary number of storage units; a data transfer control unit dividing input data into data blocks in accordance with the arbitrary number of storage units and transferring the data blocks to each storage unit; and encoding units having the same number as the storage units, the encoding units encoding the data blocks using a different cryptographic key for each storage unit while the data blocks are transferred by the data transfer control unit, wherein each storage unit stores the data blocks encoded by the encoding units.

Claims

1. A data encoding apparatus comprising:

an arbitrary number of storage units;

a data transfer control unit dividing input data into data blocks in accordance with the arbitrary number of storage units and transferring the data blocks to each storage unit; and

encoding units having the same number as the storage units, the encoding units encoding the data blocks using a different cryptographic key for each storage unit while the data blocks are transferred by the data transfer control unit, wherein

each storage unit stores the data blocks encoded by the encoding units.

2. The data encoding apparatus according to claim 1, wherein

the encoding unit includes:

a random number generating unit creating a cryptographic key by generating random numbers for each storage unit.

3. A data encoding apparatus comprising:

an arbitrary number of encoding units;

a storage unit;

a data allocation unit allocating input data to data blocks in accordance with the arbitrary number of encoding units encoding the data blocks using a different cryptographic key, the data blocks being allocated by the data allocation unit; and

a data transfer control unit transferring the data blocks to the storage unit, the data blocks being encoded by the encoding units, wherein

the storage unit stores the data blocks transferred by the data transfer control unit

4. The data encoding apparatus according to claim 3, wherein

a number of the storage units is arbitrary, and

the data transfer control unit transfers the data blocks in a predetermined data block unit to each storage unit in accordance with the number of the storage units.

5. The data encoding apparatus according to claim 3, including:

an information obtainment unit obtaining information of other data encoding apparatus;

a judgment unit judging, in an encoding procedure included in the information, whether a sequence of the data blocks of the data encoding apparatus corresponds to a sequence of data blocks of the other data encoding apparatus based on the information of the other data encoding apparatus obtained by the information obtainment unit; and

a reception unit receiving the data blocks encoded by the other data encoding apparatus, wherein

the data transfer control unit transfers the information obtained by the information obtainment unit and the data blocks received by the reception unit to the storage unit without change when the judgment unit judges that the sequence of the data blocks of the data encoding apparatus corresponds to the sequence of the data blocks of the other data encoding apparatus.

6. The data encoding apparatus according to claim 4, including:

an information obtainment unit obtaining information of other data encoding apparatus;

a judgment unit judging in an encoding procedure included in the information, whether a sequence of the data blocks of the data encoding apparatus corresponds to a sequence of data blocks of the other data encoding apparatus based on the information of the other data encoding apparatus obtained by the information obtainment unit; and

a reception unit receiving the data blocks encoded by the other data encoding apparatus, wherein

the data transfer control unit transfers the information obtained by the information obtainment unit and the data blocks received by the reception unit to the storage unit without change when the judgment unit judges that the sequence of the data blocks of the data encoding apparatus corresponds to the sequence of the data blocks of the other data encoding apparatus.

7. The data encoding apparatus according to claim 5, including:

a format change unit changing the sequence of the data blocks received by the reception unit when the judgment unit judges that the sequence of the data blocks of the data encoding apparatus is different from the sequence of the data blocks of the other data encoding apparatus.

8. The data encoding apparatus according to claim 6, including:

a format change unit changing the sequence of the data blocks received by the reception unit when the judgment unit judges that the sequence of the data blocks of the data encoding apparatus is different from the sequence of the data blocks of the other data encoding apparatus.

9. A data encoding method comprising the steps of:

data transfer control for dividing input data into data blocks in accordance with an arbitrary number of storage units and transferring the data blocks to each storage unit;

data encoding for encoding the data blocks using a different cryptographic key for each storage unit while the data blocks are transferred in the data transfer control; and

data storing for storing each of the data blocks encoded in the data encoding in the arbitrary storage units.

10. A data encoding method comprising the steps of:

data allocation for allocating input data to data blocks in accordance with an arbitrary number of encoding units;

data encoding for encoding the data blocks using a different cryptographic key, the data blocks being allocated in the data allocation;

data transfer control for transferring the data blocks encoded in the data encoding to a storage unit; and

data storing for storing the data blocks transferred in the data transfer control in the storage unit.

11. A computer-readable data encoding program which, when executed by a computer, causes the computer to perform a data encoding method comprising the steps of:

data transfer control for dividing input data into data blocks in accordance with an arbitrary number of storage units and transferring the data blocks to each storage unit;

data encoding for encoding the data blocks using a different cryptographic key for each storage unit while the data blocks are transferred in the data transfer control; and

data storing for storing each of the data blocks encoded in the data encoding in the arbitrary storage units.

12. A computer-readable data encoding program which, when executed by a computer, causes the computer to perform a data encoding method comprising the steps of:

data allocation for allocating input data to data blocks in accordance with an arbitrary number of encoding units;

data encoding for encoding the data blocks using a different cryptographic key, the data blocks being allocated in the data allocation;

data transfer control for transferring the data blocks encoded in the data encoding to a storage unit; and

data storing for storing the data blocks transferred in the data transfer control in the storage unit.

13. A computer-readable recording medium on which a computer-readable data encoding program is recorded, the program comprising the steps of:

data transfer control for dividing input data into data blocks in accordance with an arbitrary number of storage units and transferring the data blocks to each storage unit;

data encoding for encoding the data blocks using a different cryptographic key for each storage unit while the data blocks are transferred in the data transfer control; and

data storing for storing each of the data blocks encoded in the data encoding in the arbitrary storage units.

14. A computer-readable recording medium on which a computer-readable data encoding program is recorded, the program comprising the steps of:

data allocation for allocating input data to data blocks in accordance with an arbitrary number of encoding units;

data encoding for encoding the data blocks using a different cryptographic key, the data blocks being allocated in the data allocation;

data transfer control for transferring the data blocks encoded in the data encoding to a storage unit; and

data storing for storing the data blocks transferred in the data transfer control in the storage unit.