MANAGING ACCESS TO AN ADDRESS RANGE IN A STORAGE DEVICE

• US 20100161928A1
• Filed: 12/18/2008
• Published: 06/24/2010
• Est. Priority Date: 12/18/2008
• Status: Active Grant

• Current Assignee: SanDisk Technologies LLC (Western Digital Corporation)
• Original Assignee: Sandisk Technologies Incorporated (Western Digital Corporation)
• Inventors: Bryant-Rich, Donald Ray, Holtzman, Michael, Barzilai, Ron, Sela, Rotem
• Granted Patent: US 9,104,618 B2
• Time in Patent Office: Days
• US Class Current: 711/163
• CPC Class Codes: G06F 12/0246 in block erasable memory, e.g. flash memory
• CPC Class Codes: G06F 12/1441 for a range
• CPC Class Codes: G06F 21/31 User authentication
• CPC Class Codes: G06F 21/6218 to a system of files or objects, e.g. local or distributed file system or database
• CPC Class Codes: G06F 2212/1016 Performance improvement
• CPC Class Codes: G06F 2212/2022 Flash memory
• CPC Class Codes: G06F 2221/2107 File encryption
• CPC Class Codes: G06F 2221/2113 Multi-level security, e.g. mandatory access control
• CPC Class Codes: G06F 2221/2129 Authenticate client device independently of the user
• CPC Class Codes: G06F 2221/2141 Access rights, e.g. capability lists, access control lists, access tables, access matrices
• CPC Class Codes: G06F 2221/2149 Restricted operating environment

Abstract

Enhanced configuration of security and access control for data in a storage device is disclosed. A request is received to access an addressable memory location in a storage media within the storage device. A set of addressable memory locations with contiguous addresses identified by an address range is associated with first and second characteristics. The first characteristic is applied if the addressable memory location is within the set of addressable memory locations, and an entity is currently authenticated to and authorized to access the set of addressable memory locations. The second characteristic is applied if the addressable memory location is within the set of addressable memory locations, and no entity is currently authenticated to and authorized to access the set of addressable memory locations. The set of addressable memory locations can also be a logical partition, where the first and second characteristics are stored in a logical partition table.

Claims

1. A method for managing access to an addressable memory location in a storage device, the method comprising:

in a storage device with a storage media that has addressable memory locations, a set of one or more of which being identified by an address range of contiguous addresses associated with a first characteristic and a second characteristic, managing access to such addressable memory locations by;

receiving a request to access an addressable memory location in the storage media;

applying the first characteristic if the addressable memory location is within the set of addressable memory locations and at that time any entity is authenticated to and authorized to access the set of addressable memory locations; and

applying the second characteristic if the addressable memory location is within the set of addressable memory locations and at that time no entity is authenticated to and authorized to access the set of addressable memory locations.

2. The method of claim 1, wherein managing the access further comprises applying a default characteristic if the addressable memory location is not within the set of addressable memory locations.

3. The method of claim 1, wherein, if the addressable memory location is within the set of addressable memory locations, managing the access further comprises applying the first characteristic if, at that time, a particular entity making the request is authenticated to and authorized to access the set of addressable memory locations, and applying the second characteristic if, at that time, the particular entity making the request is not authenticated to and not authorized to access the set of addressable memory locations.

4. The method of claim 1, wherein the entity is authenticated to the set of addressable memory locations upon the storage device utilizing an access control record from a tree, wherein the tree comprises nodes organized hierarchically therein, each node comprising at least one access control record, wherein the access control record comprises credentials and permissions for authenticating the entity to the set of addressable locations and authorizing access by the entity to data stored in the set of addressable memory locations.

5. The method of claim 1, further comprising authorizing the entity to access the set of addressable memory locations, wherein the authorizing is performed by the storage device.

6. The method of claim 5, wherein authorizing the entity to access the set of addressable memory locations comprises utilizing an access control record from a tree to authorize the entity to access the set of addressable memory locations, wherein the tree comprises nodes organized hierarchically therein, each node comprising at least one access control record, wherein the access control record comprises credentials and permissions for authenticating the entity and authorizing entity access to data stored in the set of addressable memory locations.

7. The method of claim 5, further comprising delegating an authorization from the entity to an additional entity.

8. The method of claim 7, wherein delegating an authorization from the entity to the additional entity comprises delegating at least one permission of the access control record to an additional access control record.

9. The method of claim 1, further comprising creating an association between the set of addressable memory locations and the first characteristic and the second characteristic.

10. The method of claim 9, wherein creating the association between the logical partition and the first characteristic and the second characteristic comprises creating a new entry in a logical partition table.

11. The method of claim 1, further comprising removing an association between the set of addressable memory locations and the first characteristic and the second characteristic.

12. The method of claim 11, wherein removing the association between the logical partition and the first characteristic and the second characteristic comprises removing an entry from a logical partition table.

13. The method of claim 1, further comprising creating an association between a new set of addressable memory locations and the first characteristic and the second characteristic.

14. The method of claim 1, further comprising changing at least one of the first characteristic and the second characteristic associated with the set of addressable memory locations.

15. The method of claim 1, further comprising retrieving the at least one of the first characteristic and the second characteristic associated with the set of addressable memory locations before applying the at least one of the first characteristic and the second characteristic.

16. The method of claim 15, wherein the first characteristic and the second characteristic are stored in a logical partition table, wherein the logical partition table comprises a plurality of entries, wherein an entry comprises a logical partition identifier associated with the address range of contiguous addresses, the first characteristic, and the second characteristic.

17. The method of claim 1, wherein the set of addressable memory locations is within an addressable range of a partition table.

18. The method of claim 1, wherein the first characteristic and the second characteristic comprise access characteristics.

19. The method of claim 18, wherein the access characteristic comprises a read access permission associated with a read command.

20. The method of claim 18, wherein the access characteristic comprises a write access permission associated with a write command.

21. The method of claim 18, wherein the access characteristic comprises a read access permission associated with a read command, and a write access permission associated with a write command.

22. The method of claim 1, wherein the first characteristic and the second characteristic comprise protection characteristics.

23. The method of claim 22, wherein the protection characteristic comprises an encryption instruction.

24. The method of claim 1, wherein the first characteristic and the second characteristic comprise performance characteristics.

25. The method of claim 24, wherein the performance characteristic is one of a first performance level and a second performance level.

26. The method of claim 1, wherein the first characteristic and the second characteristic comprise power consumption characteristics.

27. The method of claim 26, wherein the power consumption characteristic is one of a first power consumption level and a second power consumption level.

28. The method of claim 1, wherein the storage device is a non-volatile removable memory card.

29. The method of claim 1, further comprising:

receiving a request by an entity to change at least one of the first characteristic and the second characteristic; and

granting the request if the entity is currently authenticated to and authorized to change at least one of the first characteristic and the second characteristic associated with the set of addressable memory locations.

30. The method of claim 29, wherein the request to change at least one of the first characteristic and the second characteristic is a request to delete the first characteristic and the second characteristic, wherein a deleted characteristic is no longer applied.

31. A storage device, comprising:

a storage media that has addressable memory locations, a set of one or more of which being identified by an address range of contiguous addresses associated with a first characteristic and a second characteristic; and

a controller operable to;

receive a request to access an addressable memory location in the storage media;

apply the first characteristic if the addressable memory location is within the set of addressable memory locations and at that time any entity is authenticated to and authorized to access the set of addressable memory locations; and

apply the second characteristic if the addressable memory location is within the set of addressable memory locations and at that time no entity is authenticated to and authorized to access the set of addressable memory locations.

32. The storage device of claim 31, wherein the controller is further operable to apply a default characteristic if the addressable memory location is not within the set of addressable memory locations.

33. The storage device of claim 31, wherein an entity is authenticated to the set of addressable memory locations upon the storage device utilizing an access control record from a tree, wherein the tree comprises nodes organized hierarchically therein, each node comprising at least one access control record, wherein the access control record comprises credentials and permissions for authenticating the entity to the set of addressable locations and authorizing access by the entity to data stored in the set of addressable memory locations.

34. The storage device of claim 31, wherein an entity is authorized to access the set of addressable memory locations upon the storage device utilizing an access control record from a tree, wherein the tree comprises nodes organized hierarchically therein, each node comprising at least one access control record, wherein the access control record comprises credentials and permissions for authenticating the entity and authorizing entity access to data stored in the set of addressable memory locations.

35. The storage device of claim 31, wherein the storage media further comprises a logical partition table, wherein the logical partition table comprises a plurality of entries, wherein an entry comprises a logical partition identifier associated with the address range of contiguous addresses, the first characteristic, and the second characteristic.