Job processing device and data management for the device

• US 7,502,944 B2
• Filed: 09/03/2003
• Issued: 03/10/2009
• Est. Priority Date: 03/24/2003
• Status: Expired due to Fees

• Current Assignee: Fuji Xerox Company Limited (Fujifilm Holdings Corporation)
• Original Assignee: Fuji Xerox Company Limited (Fujifilm Holdings Corporation)
• Inventors: Satake, Masanori, Masui, Takanori, Yokohama, Tatsuhiko
• Primary Examiner(s): Moise; Emmanuel L
• Assistant Examiner(s): Davis; Zachary A
• Application Number:
  US10/653,217
• Publication Number:
  US 20040193899A1
• Time in Patent Office: 2,015 Days
• Field of Search: 713/190, 713/193, 700 99-101, 380/51, 380/54, 380/55, 283/72, 358/1.14, 358/1.15, 358/1.16
• US Class Current: 713/193
• CPC Class Codes: G06F 21/608 Secure printing
• CPC Class Codes: G06F 21/6245 Protecting personal data, e.g. for financial or medical purposes

Abstract

A job device for increasing security of job data includes a CPU that encrypts job data while saving job data required in execution of a job. The CPU saves part of the data in RAM, and saves the remaining stored file in an HDD. When the job ends, part of the job data for the job in the RAM is deleted. Part of the job data is therefore completely eliminated as a result of this deletion, and it is not possible to know the complete job data even if the HDD is removed and checked.

Claims

1. A job processing device for executing jobs based on job data, comprising:

a first storage device;

a second storage device capable of having stored data erased at a faster speed than the first storage device;

a storage controller for dividing a job data file supplied for executing a job into a plurality of parts, and distributing the plurality of parts between the first and second storage devices, based on available space in the second storage device, wherein data corresponding to one or more of the plurality of parts stored on the second storage device are not stored on the first storage device;

a deletion controller for deleting the one or more parts of the job data file stored on the second storage device, by the storage controller, when a prescribed deletion condition is satisfied; and

a job controller for executing a following job without waiting for completion of deletion of parts of the job data file stored in the first storage device when the one or more parts of the job data file stored in the second storage device are deleted by the deletion controller.

2. The job processing device of claim 1, further comprising:

a job data reconstructor for reading out and reconstructing job data files being distributed between the first and second storage devices by the storage controller; and

a job processing unit for executing jobs based on job data reconstructed by the job data reconstructor, wherein completion of job execution by the job processing unit is taken as the prescribed deletion condition in the deletion controller.

3. The job processing device of claim 1, wherein the second storage device is volatile memory.

4. The job processing device of claim 1, wherein the second storage device is an area that is part of a main storage device the job processing device is equipped with.

5. The job processing device of claim 1, wherein the storage controller encrypts the job data and distributes data resulting from this encryption between the first storage device and the second storage device.

6. The job processing device of claim 1, wherein

the storage controller distributes job data between the first storage device and the second storage device in accordance with a prescribed rule;

and

the job processing device is further equipped with a rule manager for changing the prescribed rule.

7. The job processing device of claim 6, wherein the rule manager changes the prescribed rule according to the state of the job processing device.

8. The job processing device of claim 6, wherein the rule manager changes the prescribed rule according to an attribute of the job.

9. The job processing device of claim 1, further comprising a remaining data deletion controller for deleting job data distributed to the first storage device after deleting job data distributed to the second storage device.

10. The job processing device of claim 1, wherein the prescribed deletion condition for the deletion controller is receipt of a job data deletion instruction from a user.

11. The job processing device of claim 1, wherein the prescribed deletion condition for the deletion controller is receipt of a halt job execution instruction from a user.

12. The job processing device of claim 1, wherein the job controller executes the next job at the time of completion of deletion of the one or more parts of the job data file stored on the second storage device by the deletion controller.

13. A data management method for a job processing device, comprising the steps of:

distributing job data supplied for executing a job between a first storage device and a second storage device capable of deleting data at a higher speed than the first storage device;

deleting one or more parts of the stored job data that is stored in the second storage device when a prescribed deletion condition is satisfied; and

executing a following job without waiting for completion of deletion of parts of the job data stored in the first storage device when the one or more parts of the job data stored in the second storage device is deleted.