INFORMATION CONCEALMENT METHOD AND INFORMATION CONCEALMENT DEVICE

• US 20090310776A1
• Filed: 03/04/2009
• Published: 12/17/2009
• Est. Priority Date: 06/13/2008
• Status: Abandoned Application

• Current Assignee: Kyocera MITA Corporation (Kyocera Corporation)
• Original Assignee: Kyocera MITA Corporation (Kyocera Corporation)
• Inventors: Kanemitsu, Shigenaka
• Application Number:
  US12/397,838
• Publication Number:
  US 20090310776A1
• Time in Patent Office: Days
• US Class Current: 380/28
• CPC Class Codes: G06F 21/10 Protecting distributed programs or content, e.g. vending or licensing of copyrighted material protection in video systems or pay television H04N7/16 ; Digital rights management [DRM]
• CPC Class Codes: G06F 21/6218 to a system of files or objects, e.g. local or distributed file system or database

Abstract

An information concealment method comprising: a splitting step to split information into an encryption segment to be encrypted and a non-encryption segment not to be encrypted according to a predetermined rule; an encryption step of encrypting the encryption segment; a control table generating step of generating a control table for indicating one of a location of the encryption segment and/or a location of the non-encryption segment of the information; and an organization step of coupling or associating the information, in which the encryption segment has been encrypted, with the control table and a device for performing the method are provided.

Claims

1. An information concealment method, comprising:

a splitting step to split information into an encryption segment to be encrypted and a non-encryption segment not to be encrypted according to a predetermined rule;

an encryption step of encrypting the encryption segment;

a control table generating step for generating a control table for indicating a location of the encryption segment and/or a location of the non-encryption segment of the information; and

an organization step to couple or associate the information, in which the encryption segment has been encrypted, with the control table.

2. The information concealment method according to claim 1, wherein the splitting step comprises setting a segment including one of a predetermined bit pattern and a predetermined text pattern as the encryption segment within the information.

3. The information concealment method according to claim 1, wherein the splitting step comprises setting a segment including an application program interface (API) call instruction as the encryption segment within the information.

4. The information concealment method according to claim 1, wherein the splitting step comprises:

splitting the information into a plurality of segments having a fixed length;

selecting some segments from among the plurality of segments; and

setting the selected some segments as encryption segments.

5. The information concealment method according to claim 1, wherein the splitting step comprises:

splitting the information into a plurality of segments each having a random length;

selecting some segments from among the plurality of segments; and

setting the selected some segments as encryption segments.

6. The information concealment method according to claim 1, comprising a hash value calculating step of calculating one of a hash value selected from the group consisting of the encryption segment and the non-encryption segment,

wherein the control table generating step comprises recording the hash value calculated in the hash value calculating step into the control table.

7. The information concealment method according to claim 6, wherein the hash value calculating step comprises calculating at least a hash value of a part of the encryption and non-encryption segments.

8. The information concealment method according to claim 1, wherein the splitting step comprises splitting, in a case where a plurality of programs are included in the information, the information into a plurality of segments so that the plurality of programs correspond to the plurality of segments on a one-to-one basis.

9. The information concealment method according to claim 1, wherein the control table generating step comprises recording at least a start address, a length, and a value indicating an encryption status of each segment into the control table.

10. An information concealment device, comprising:

a split unit for splitting information into an encryption segment to be encrypted and a non-encryption segment not to be encrypted according to a predetermined rule;

an encryption unit for encrypting the encryption segment;

a control table generating unit for generating a control table for indicating a location of the encryption segment and/or a location of the non-encryption segment of the information; and

an organization unit to couple or associate the information, in which the encryption segment has been encrypted, with the control table.

11. The information concealment device according to claim 10, wherein the split unit sets a segment including one of a predetermined bit pattern and a predetermined text pattern as the encryption segment within the information.

12. The information concealment device according to claim 10, wherein the split unit sets a segment including an application program interface (API) call instruction as the encryption segment within the information.

13. The information concealment device according to claim 10, wherein the split unit splits the information into a plurality of segments having a fixed length, selects some segments from among the plurality of segments, and sets the selected some segments as encryption segments.

14. The information concealment device according to claim 10, wherein the split unit splits the information into a plurality of segments each having a random length, selects some segments from among the plurality of segments, and sets the selected some segments as encryption segments.

15. The information concealment device according to claim 10, comprising a hash value calculating unit for calculating a hash value selected from the group consisting of the encryption segment and the non-encryption segment,

wherein the control table generating unit records the hash value calculated by the hash value calculating unit into the control table.

16. The information concealment device according to claim 15, wherein the hash value calculating unit calculates at least a hash value of a part of the encryption and non-encryption segments.

17. The information concealment device according to claim 10, wherein the split unit splits, in a case where a plurality of programs are included in the information, the information into a plurality of segments so that the plurality of programs correspond to the plurality of segments on a one-to-one basis.

18. The information concealment device according to claim 10, wherein the control table generating unit records at least a start address, a length, and a value indicating an encryption status of each segment into the control table.

19. An information concealment method, comprising:

a splitting step for moving information into an encryption segment and a non-encryption segment according to a predetermined rule;

an encryption step of encrypting the encryption segment;

a step for generating a control table for indicating a location of the encryption segment on the information; and

a step to couple the information, in which the encryption segment has been encrypted, with the control table.