SYSTEM AND METHOD OF MANAGING FILE AND MOBILE TERMINAL DEVICE

• US 20090077096A1
• Filed: 03/18/2008
• Published: 03/19/2009
• Est. Priority Date: 04/27/2007
• Status: Abandoned Application

• Current Assignee: Hitachi Software Engineering Co., Ltd. (Hitachi, Ltd.)
• Original Assignee: Hitachi Software Engineering Co., Ltd. (Hitachi, Ltd.)
• Inventors: Kirihata, Yasuhiro, Ohama, Nobuyuki
• Application Number:
  US12/050,393
• Publication Number:
  US 20090077096A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 21/575 Secure boot
• CPC Class Codes: G06F 21/6227 where protection concerns the structure of data, e.g. records, types, queries
• CPC Class Codes: H04L 63/0428 wherein the data content is protected, e.g. by encrypting or encapsulating the payload
• CPC Class Codes: H04L 63/102 Entity profiles
• CPC Class Codes: H04L 67/06 specially adapted for file transfer, e.g. file transfer protocol [FTP]

Abstract

A secure file holding system that can, for confidential data from a PC to a mobile phone, prevent flow-out of data due to wrong operation of the mobile phone by an authorized user and malicious take-out of data by authorized and unauthorized users. The file holding system has a function of reserving part of an execution memory as volatile memory or part of a non-volatile memory as a non-volatile file and coupling the part to the non-volatile memory accessible as a folder in which a user saves data at OS startup, a function of redirecting access to the folder to the volatile memory or the file during OS startup, a function of capturing an input/output request to the non-volatile memory and constraining access to the folder by a processes other than a file management process, and a function of deleting the volatile memory or the file at OS termination.

Claims

1. A file management system comprising a user terminal device and a mobile terminal device, and for transferring a confidential file between the devices, wherein

said user terminal device comprises:

file transfer controlling means for requesting access to said mobile terminal device and executing transfer of the confidential file, and

said mobile terminal device comprises;

file management means for, at the startup of an OS in the mobile terminal device, reserving part of an execution memory in the device as a volatile memory region being a memory region that is deleted at the termination of said OS, and coupling a virtual folder to save the confidential file transferred from said user terminal device to said volatile memory region; and

redirection means for redirecting access to said virtual folder to said volatile memory region during the OS startup in said mobile terminal device.

2. The file management system according to claim 1, wherein said mobile terminal device further comprises memory access controlling means for permitting access to said confidential file in response to a request to access said volatile memory region only if an accessing side is said file management means.

3. The file management system according to claim 1, wherein said file management means deletes said volatile memory region from said execution memory at the OS termination in said mobile terminal device.

4. The file management system according to claim 2, wherein said file management means deletes said volatile memory region from said execution memory at the OS termination in said mobile terminal device.

5. A file management system comprising a user terminal device and a mobile terminal device, and for transferring a confidential file between the devices, wherein

said user terminal device comprises:

file transfer controlling means for requesting access to said mobile terminal device and executing transfer of the confidential file, and

said mobile terminal device comprises;

file management means for, at the startup of an OS in the mobile terminal device, reserving part of a memory in the device as a volatile memory region being a memory region that is deleted at the termination of said OS, and saving the confidential file transferred from said user terminal device in said volatile memory region; and

memory access controlling means for permitting access to said confidential file in response to a request to access said volatile memory region during the OS startup in said mobile terminal device only if the accessing side is said file management means.

6. A file management system comprising a user terminal device and a mobile terminal device, and for transferring a confidential file between the devices, wherein

said user terminal device comprises:

file transfer controlling means for requesting access to said mobile terminal device and executing transfer of the confidential file, and

said mobile terminal device comprises;

file management means for, at the startup of an OS in the mobile terminal device, reserving part of a non-volatile memory as a non-volatile file region being a memory region that survives after the termination of said OS, and coupling a folder to save the confidential file transferred from said user terminal device to said non-volatile file region; and

redirection means for redirecting access to said folder to said non-volatile file region during the OS startup in said mobile terminal device.

7. The file management system according to claim 6, wherein said file management means deletes only said confidential file stored in said non-volatile file region at the OS termination in said mobile terminal device.

8. A mobile terminal device for transmitting and receiving a confidential file to/from a user terminal device, comprising:

file management means for, at the startup of an OS, reserving part of an execution memory in the device as a volatile memory region being a memory region that is deleted at the termination of said OS, and coupling a virtual folder to save the confidential file transferred from said user terminal device to said volatile memory region; and

redirection means for redirecting access to said virtual folder to said volatile memory region during said OS startup.

9. The mobile terminal device according to claim 8 further comprising memory access controlling means for permitting access to said confidential file in response to a request to access said volatile memory region only if an accessing side is said file management means.

10. The mobile terminal device according to claim 8, wherein said file management means deletes said volatile memory region from said execution memory at said OS termination.

11. The mobile terminal device according to claim 9, wherein said file management means deletes said volatile memory region from said execution memory at said OS termination.

12. A mobile terminal device for transmitting and receiving a confidential file to/from a user terminal device, comprising:

file management means for, at the startup of an OS, reserving part of a memory as a volatile memory region being a memory region that is deleted at the termination of said OS, and saving the confidential file transferred from said user terminal device in said volatile memory region; and

memory access controlling means for permitting access to said confidential file in response to a request to access said volatile memory region during said OS startup only if the accessing side is said file management means.

13. A mobile terminal device for transmitting and receiving a confidential file to/from a user terminal device, comprising:

file management means for, at the startup of an OS, reserving part of the non-volatile memory as a non-volatile file region being a memory region that survives after the termination of said OS, and coupling a folder to save the confidential file transferred from said user terminal device to said non-volatile file region; and

redirection means for redirecting access to said folder to said non-volatile file region during said OS startup.

14. The mobile terminal device according to claim 13, wherein said file management means deletes only said confidential file stored in said non-volatile file region at said OS termination.

15. A file management method of managing transfer of a confidential file in a system comprising a user terminal device and a mobile terminal device, wherein

in said user terminal device:

file transfer controlling means requests access to said mobile terminal device and executes transfer of the confidential file, and

in said mobile terminal device;

file management means, at the startup of an OS in the mobile terminal device, reserves part of an execution memory in the device as a volatile memory region being a memory region that is deleted at the termination of said OS, and couples a virtual folder to save the confidential file transferred from said user terminal device to said volatile memory region; and

redirection means redirects access to said virtual folder to said volatile memory region during the OS startup in said mobile terminal device.

16. A file management method of managing transfer of a confidential file in a system comprising a user terminal device and a mobile terminal device, wherein

in said user terminal device:

file transfer controlling means requests access to said mobile terminal device and executing transfer of the confidential file, and

in said mobile terminal device;

file management means, at the startup of an OS in the mobile terminal device, reserves part of a memory in the device as a volatile memory region being a memory region that is deleted at the termination of said OS, and saves the confidential file transferred from said user terminal device in said volatile memory region; and

memory access controlling means permits access to said confidential file in response to a request to access said volatile memory region during the OS startup in said mobile terminal device only if the accessing side is said file management means.

17. A file management method of managing transfer of a confidential file in a system comprising a user terminal device and a mobile terminal device, wherein

in said user terminal device:

file transfer controlling means requests access to said mobile terminal device and executing transfer of the confidential file, and

in said mobile terminal device;

file management means, at the startup of an OS in the mobile terminal device, reserves part of the non-volatile memory as a non-volatile file region being a memory region that survives after the termination of said OS, and couples a folder to save the confidential file transferred from said user terminal device to said non-volatile file region; and

redirection means redirects access to said folder during the OS startup in said mobile terminal device to said non-volatile file region.