Job processing device and data management method for the device

• US 20040193899A1
• Filed: 09/03/2003
• Published: 09/30/2004
• Est. Priority Date: 03/24/2003
• Status: Active Grant

• Current Assignee: Fuji Xerox Company Limited (Xerox Holdings Corp.)
• Original Assignee: Fuji Xerox Company Limited (Xerox Holdings Corp.)
• Inventors: Satake, Masanori, Masui, Takanori, Yokohama, Tatsuhiko
• Granted Patent: US 7,502,944 B2
• Time in Patent Office: Days
• US Class Current: 713/190
• 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.

A CPU (10) encrypts job data while saving job data required in execution of a job, saves part of the data (42) in RAM (14), and saves the remaining stored file (40) in a HDD (16). When the job ends, part (42) of the job data for the job in the RAM (14) is deleted. Part of the job data (42) 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 (16) 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 distributing job data provided to execute a job between the first storage device and the second storage device; and

a deletion controller for deleting job data stored allocated to the second storage device by the storage controller when a prescribed deletion condition is satisfied.

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

a job data reconstructor for reading out and reconstructing data stored 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, further comprising a job controller for controlling execution of jobs, permitting execution of the next job at the time of completion of data deletion processing by the deletion controller.

13. The job processing device of claim 1, wherein the storage controller decides the size of the job data distributed to the second storage device based on an amount of free space in the second storage device.

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

a storage controller for storing job data supplied for job execution in a storage device; and

a deletion controller for deleting part of the job data stored in the storage device by the storage controller when a prescribed deletion condition is satisfied.

15. The job processing device of claim 14, further comprising a job processing unit for reading out job data from the storage device and executing the job using the read-out job data, wherein completion of job execution by the job processing unit is taken as a prescribed deletion condition in the deletion controller.

16. The job processing device of claim 14, wherein the prescribed deletion condition for the deletion controller is receipt of a job data deletion instruction from a user.

17. The job processing device of claim 14, wherein the prescribed deletion condition for the deletion controller is receipt of a halt job execution instruction from a user.

18. The job processing device of claim 14, further comprising a job controller for controlling execution of jobs, permitting execution of the next job at the time of completion of data deletion processing by the deletion controller.

19. 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; and

deleting a portion of data of the stored job data that is stored in the second storage device when a prescribed deletion condition is satisfied.