Method for data storage protection and encryption

• US 8,108,693 B2
• Filed: 03/30/2006
• Issued: 01/31/2012
• Est. Priority Date: 04/01/2005
• Status: Expired due to Fees

• Current Assignee: Ged-I Limited
• Original Assignee: Ged-I Limited
• Inventors: Atzmon, Elisha, Cohen, Giora, Saar, David
• Primary Examiner(s): Gergiso, Techane
• Application Number:
  US11/910,393
• Publication Number:
  US 20080151740A1
• Time in Patent Office: 2,133 Days
• Field of Search: 713/193, 713/164, 713/189
• US Class Current: 713/193
• 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: G11B 20/00086 Circuits for prevention of unauthorised reproduction or copying, e.g. piracy indicating unauthorised use of record carriers in general G11B23/28; scrambling for television signal recording H04N5/913; network architectures or network protocols for network security H04L63/00; cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
• CPC Class Codes: G11B 20/0021 involving encryption or decryption of contents recorded on or reproduced from a record carrier
• CPC Class Codes: G11B 20/00507 wherein consecutive physical data units of the record carrier are encrypted with separate encryption keys, e.g. the key changes on a cluster or sector basis
• CPC Class Codes: G11B 20/00615 said format change concerning the logical format of the recording medium, e.g. the structure of sectors, blocks, or frames
• CPC Class Codes: G11B 20/00623 wherein the modification to the logical format directly concerns user data
• CPC Class Codes: G11B 20/00652 the address data being scrambled so that ascending address values do not reflect the physical order of data blocks
• CPC Class Codes: G11B 20/00934 said intentional errors occurring because of corrupted address information
• CPC Class Codes: G11B 20/00949 said intentional errors occurring due to bad sectors, which are either physically destroyed or which are declared defective in the defect management information
• CPC Class Codes: G11B 20/1866 by interleaving G11B20/1809 takes precedence
• CPC Class Codes: G11B 2020/1232 sector, i.e. the minimal addressable physical data unit
• CPC Class Codes: G11B 2220/2516 Hard disks
• CPC Class Codes: G11B 2220/2537 Optical discs
• CPC Class Codes: G11B 2220/90 Tape-like record carriers

Abstract

Methods for data storage protection and encryption are disclosed. In some of these methods, the method may include any of the following, among other things, storing information about the storage format to a Geometrical Cell Location Table (GCLT), shuffling a Geometrical Cell Location Table giving rise to a Shuffled Geometrical Cell Location Table (SGCLT), encrypting data using more than one key, renewing content, and/or filling empty sectors with encrypted data.

Claims

1. A method of dividing a computer readable disk that includes at least one track and the track is divided into at least two geometrical cells (GCs), comprising:

dividing at least one of the at least one track on the computer readable disk into at least two neighboring geometrical cells (GCs);

at least one of said GCs is bordered by at least one of a different internal radius or different outer radius compared to the respective radius of a neighboring cell of said track; and

storing a Geometrical Cell Location Table (GCLT), for accessing data in said cells, said accessing include inserting or updating or deleting data;

wherein said GCLT is encrypted.

2. the method according to claim 1, wherein said GCLT is stored in different medium than said disk.

3. The method according to claim 1, further comprising encrypting data in at least one of said cells.

4. The method according to claim 3, wherein said encrypting includes encrypting data in a cell utilizing at least two keys, each key being used to encrypt part of the data in said cell.

5. The method according to claim 3, wherein said encrypting includes encrypting data in a cell utilizing at least two encryption algorithms, each algorithm being used to encrypt part of the data in said cell.

6. A method of dividing a computer readable disk that includes at least one track and the track is divided into at least two geometrical cells (GCs), comprising:

dividing at least one of the at least one track on the computer readable disk into at least two neighboring geometrical cells (GCs);

at least one of said GCs defining a different angular size compared to the angular size of a neighboring GC of said track; and

storing a Geometrical Cell Location Table (GCLT), for accessing data in said cells, said accessing includes inserting, updating or deleting data;

wherein said GCLT is encrypted.

7. The method according to claim 6, wherein said GCLT is stored in different medium than said disk.

8. The method according to claim 6, further comprising encrypting data in at least one of said cells.

9. The method according to claim 8, wherein said encrypting includes encrypting data in a cell utilizing at least two keys, each key being used to encrypt part of the data in said cell.

10. The method according to claim 8, wherein said encrypting includes encrypting data in a cell utilizing at least two encryption algorithms, each algorithm being used to encrypt part of the data in said cell.

11. A method of dividing a computer readable disk that includes at least one track and the track is divided into at least two geometrical cells (GCs), comprising:

dividing at least one of the at least one track on the computer readable disk into at least two neighboring geometrical cells (GCs);

at least one of said GCs is bordered by at least one of a different internal radius or different outer radius compared to the respective radius of a neighboring cell of said track;

storing a Geometrical Cell Location Table (GCLT), for accessing data in said cells, said accessing include inserting or updating or deleting data; and

shuffling said Geometrical Cell Location Table, giving rise to Shuffled Geometrical Cell Location Table (SGCLT), such that a GC from among said at least one GCs having a GC address in said GCLT will have a different address in said SGCLT;

said GCLT facilitating access of cell of interest.

12. The method according to claim 11, wherein said SGCLT is stored in a different medium than said disk.

13. The method according to claim 11, wherein said SGCLT is encrypted.

14. A method of dividing a computer readable disk that includes at least one track and the track is divided into at least two geometrical cells (GCs), comprising:

dividing at least one of the at least one track of the computer readable disk into at least two neighboring geometrical cells (GCs);

at least one of said GCs defining a different angular size compared to the angular size of a neighboring GC of said track;

storing a Geometrical Cell Location Table (GCLT), for accessing data in said cells, said accessing includes inserting, updating or deleting data; and

shuffling said Geometrical Cell Location Table, giving rise to Shuffled Geometrical Cell Location Table (SGCLT), such that a GC from among said at least one GCs having a GC address in said GCLT will have a different address in said SGCLT;

said GCLT facilitating access of cell of interest.

15. The method according to claim 14, wherein said SGCLT is stored in a different medium than said disk.

16. The method according to claim 14, wherein said SGCLT is encrypted.

17. A method of dividing a computer readable disk that includes at least one track and the track is divided into at least two geometrical cells (GCs), comprising:

dividing at least one of the at least one track of the computer readable disk into at least two neighboring geometrical cells (GCs);

at least one of said GCs is bordered by at least one of a different internal radius or different outer radius compared to the respective radius of a neighboring cell of said track;

at least one of said GCs defining a different angular size compared to the angular size of a neighboring GC of said track;

storing a Geometrical Cell Location Table (GCLT), for accessing data in said cells, said accessing includes inserting, updating or deleting data; and

shuffling said Geometrical Cell Location Table, giving rise to Shuffled Geometrical Cell Location Table (SGCLT), such that a GC from among said at least one GCs having a GC address in said GCLT will have a different address in said SGCLT;

said GCLT facilitating access of cell of interest.

18. The method according to claim 17, wherein the GC stipulated as bordered by at least one of a different internal radius or different outer radius and defining a different angular size is one GC and the neighboring GC is a second GC.

19. The method according to claim 17, wherein said SGCLT is stored in a different medium that said disk.

20. The method according to claim 17, further comprising encrypting data in at least one of said cells.

21. The method according to claim 20, wherein said encrypting includes encrypting data in a cell utilizing at least two keys, each key being used to encrypt part of the data in said cell.

22. The method according to claim 20, wherein said encrypting includes encrypting data in a cell utilizing at least two encryption algorithms, each algorithm being used to encrypt part of the data in said cell.

23. The method according to claim 17, wherein said SGCLT is stored in a different medium than said disk.

24. The method according to claim 17, wherein said SGCLT is encrypted.

25. A method of dividing a computer readable disk that includes at least one track, said track is divided into at least two geometrical cells (GCs), comprising:

dividing at least one of the at least one track of the computer readable disk into geometrical cells (GCs);

at least one of said GCs is bordered by at least different internal radius or different outer radius compared to the respective radius of a neighboring cell of said track;

at least one of said GCs defining a different angular size compared to the angular size of a neighboring GC of said track; and

storing a Geometrical Cell Location Table (GCLT), for accessing data in said cells, said accessing include inserting or updating or deleting data;

wherein said GCLT is encrypted.

26. A method of renewing content in a computer readable disk, the disk includes at least one track and the track is divided into at least two geometrical cells (GCs), comprising:

dividing the computer readable disk into tracks and geometrical cells (GCs) constituting sectors and constructing Logical Block Address (LBA) for facilitating access of sector of interest;

storing data in said sectors;

shuffling at least two of said sectors addresses, giving rise to Shuffled LBA (SLBA), such that a sector from among said at least one sectors having a sector address in said LBA will have a different address in said SLBA;

said SLBA facilitating access of sector of interest; and

renewing content of selected sectors according to a predefined criterion, thereby hindering the possibility of dating data based on aging.

27. The method according to claim 26, wherein said SLBA is stored in a different medium than said disk.

28. The method according to claim 26, wherein said SLBA is encrypted.

29. The method according to claim 26, further comprising:

encrypting data in at least one of said sectors.

30. The method according to claim 29, wherein said encrypting includes encrypting data in a sector utilizing at least two keys, each key being used to encrypt part of the data in said sector.

31. The method according to claim 29, wherein said encrypting includes encrypting data in a sector utilizing at least two encryption algorithms, each algorithm being used to encrypt part of the data in said sector.

32. A method of renewing content in a computer readable disk, the disk includes at least one track and the track is divided into at least two geometrical cells (GCs), comprising:

dividing the computer readable disk into tracks and geometrical cells (GCs) constituting sectors and constructing Logical Block Address (LBA) for facilitating access of sector of interest;

storing data in said sectors;

encrypting data in at least one of said sectors, wherein said encrypting includes encrypting data in a sector utilizing at least two keys, each key being used to encrypt part of the data in said sector; and

renewing content of selected sectors according to a predefined criterion, thereby hindering the possibility of dating data based on aging.

33. A method of renewing content in a computer readable disk, the disk includes at least one track and the track is divided into at least two geometrical cells (GCs), comprising:

dividing the computer readable disk into tracks and geometrical cells (GCs) constituting sectors and constructing Logical Block Address (LBA) for facilitating access of sector of interest;

storing data in said sectors;

encrypting data in at least one of said sectors, wherein said encrypting includes encrypting data in a sector utilizing at least two encryption algorithms, each algorithm being used to encrypt part of the data in said sector; and

renewing content of selected sectors according to a predefined criterion, thereby hindering the possibility of dating data based on aging.