Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

Apparatus, method and computer readable storage medium with recorded program for managing files with alteration preventing/detecting functions

a technology of computer readable storage and program, applied in the field of system for managing files, can solve the problems of difficult to modify the size of both a secure area and a normal area, and computerized data involves a risk of being altered by a third party

Inactive Publication Date: 2008-10-30
FUJITSU LTD
View PDF21 Cites 13 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0008]It is an object of the present invention to provide a system for managing files having alteration preventing / detecting functions for preventing a secure area from being easily accessed and preventing the authenticator and access log, etc. related to a data file from being freely altered, by means of reciprocal authentication obtained between a file system and a storing unit such as, for example, a unit of firmware.

Problems solved by technology

For this reason, the computerized data involves a risk of being altered by a third party.
Although a necessary secure area differs in size, since the sizes of access logs, etc. expand dynamically, usually it is difficult to modify the size of both a secure area and a normal area.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Apparatus, method and computer readable storage medium with recorded program for managing files with alteration preventing/detecting functions
  • Apparatus, method and computer readable storage medium with recorded program for managing files with alteration preventing/detecting functions
  • Apparatus, method and computer readable storage medium with recorded program for managing files with alteration preventing/detecting functions

Examples

Experimental program
Comparison scheme
Effect test

first embodiment

[0119]The reciprocal authentication described in this invention is carried out in advance.

[0120]In step S130 a medium ID reading unit 16 reads a medium ID 36 from the secure area 31 in the medium 3, and transfers the medium ID 36 to the authentication information creation unit 14.

[0121]In step S131 the main-file storage unit 136 stores the main-file 33 in the medium 3 in units of blocks, and also transfers the main-file 33 to the authentication information creation unit 14.

[0122]In step S132, when receiving the main-file 33, the authentication information creation unit 14 creates an authenticator being authentication information from the main-file 33 using the medium ID 36 as a key, and transfers the authenticator to the sub-file storage unit 138. It is assumed here that the authenticator is created using a data encryption standard-message authentication code (DES-MAC).

[0123]In step S133 it is checked whether or not all the blocks of the main-file 33 are processed. If there is still...

sixth embodiment

[0132]FIG. 14 shows the configuration of the file management system having the alteration preventing / detecting functions of this invention.

[0133]The configuration and basic operation of the sixth embodiment of this invention are the same as the configuration and basic operation of the fifth embodiment of this invention, except that the medium ID 36 read by the medium ID reading unit 16 in the fifth embodiment of this invention described with reference to FIG. 12, is replaced with a card ID 18 in the sixth embodiment of this invention.

seventh embodiment

[0134]FIG. 15 shows the configuration of the file management system having the alteration preventing / detecting functions of this invention.

[0135]The configuration and basic operation of the seventh embodiment of this invention are the same as the configuration and basic operation of the fifth embodiment of this invention, except that the medium ID 36 read by the medium ID reading unit 16 in the fifth embodiment of this invention described with reference to FIG. 12 is replaced with a master ID 17 in the seventh embodiment of this invention.

[0136]FIG. 16 shows the configuration of the file management system having the alteration preventing / detecting functions of the eighth embodiment of this invention. FIG. 17 is a flowchart showing the operation of the eighth embodiment of this invention.

[0137]In step S171, when a verification request is issued by a higher-order layer (a user, etc.) via input / output unit 41, the system file reading unit 135 reads an authenticator being corresponding ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

By storing an authenticator created from a data file in a secure area usually unaccessible, the alteration of the data file can be detected. Furthermore, by designating the data file as a main-file and creating authenticators from various kinds of sub-files related to the main-file, the size of the secure area where the authenticators are stored, can be reduced.

Description

BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to a system for managing files having the functions of altering files and detecting the alteration of files, and more particularly to a file managing system for implementing the alteration prevention of files and detecting the alteration by storing authenticators indirectly created from files in an area inaccessible by the operator.[0003]2. Description of the Related Art[0004]As the computerization of official documents such as tax-related slips, etc. is promoted, a demand for keeping computerized data as evidence, safely and for a long time, in the same way as data is preserved on paper, has been increasing. The computerized documents can be very easily processed and reused, and can easily be added to, deleted from, corrected or transferred via a network, etc. For this reason, the computerized data involves a risk of being altered by a third party.[0005]To solve this problem the applicant ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(United States)
IPC IPC(8): G06F12/14G06F21/60G06F1/00G06F12/00G06F21/10G06F21/62G06F21/64
CPCG06F21/64
Inventor KAMADA, JUNKURODA, YASUTSUGUONO, ETSUO
Owner FUJITSU LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com