JPH05165697A - Device and method and setting information protective level - Google Patents

Abstract

PURPOSE:To obtain the device and the method for setting an information protective level, by which an owner of an original file sets it as uneditable, other person cannot set it as editable, even if the file owner is changed at the time or copying, etc. CONSTITUTION:An input means 2 inputs a password and various instructions, etc. A password store means 3 stores the password inputted through the input means 2 in a file. A password existence deciding means 4 decides whether the password is stored in the file or not. A password coincidence deciding means 5 decides whether the password inputted through the input means 2 and the password stored in the file coincide with each other or not. A password deleting means 6 deletes the password stored in the file.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information protection level setting device and an information protection level setting method for setting a protection level for preventing information destruction by others.

[0002]

2. Description of the Related Art Generally, a file has a file structure composed of data 31 and a file header 32 showing the attributes of the file, as shown in FIG.
2 has an owner name field 33 for storing the owner name of the file and another person write permission field 34 for indicating whether or not the file may be written by a person other than the owner.

The conventional information protection level setting method is as follows.
As shown in FIG. 7, when setting the information protection level, it is first determined whether or not the user name input when the system is started up matches the name stored in the owner name field 33 of the file. (Step S31) If they match with each other, it is determined whether the editable in which others other than the owner of the file can write to the file is selected or the editable in which others cannot write to the file is selected. If it is determined that the editable is selected (step S32), the content of the other person write permission field 34 is permitted (step S33). If it is determined that the uneditable is selected, the content of the other person write permission field 34 is not permitted. Yes (step S34). As a result, if the content of the other person write permission field 34 is permitted, the other person can edit it. In addition,
If it is determined in step S31 that the user's name does not match the name stored in the owner name field 33 of the file, the contents of the write permission field 34 for others cannot be changed.

[0004]

According to the conventional information protection level setting method, since it is only set whether or not another person can edit in the write permission field 34 of another person, when a file is copied, for example, the owner of the copy destination file can be set. Since the name of the new owner is stored in the name field 33,
There is a problem that the new owner can freely edit the copy destination file and the contents of the copy destination file are destroyed by the new owner.

The present invention has been made in view of the above circumstances. If the owner of the original file cannot edit it, anyone other than the original file can make it editable even if the file owner is changed by copying or the like. An object is to provide an information protection level setting device and an information protection level setting method.

[0006]

According to another aspect of the present invention, there is provided an information protection level setting device, wherein an input means for inputting a password or various instructions, and a password storage for storing the password input through the input means in a file. Means and
Password existence determining means for determining whether or not a password is stored in the file, and password matching for determining whether or not the password input through the input means and the password stored in the file match The storage device further comprises a judging means and a password deleting means for deleting the password stored in the file. When the password is stored in the file, the password and the password input by the user through the input means are combined. The feature is that the password stored in the file cannot be deleted or changed unless it is done.

An information protection level setting device according to a second aspect of the invention is characterized in that, in the information protection level setting device according to the first aspect, the password is stored in a password record and added to the file. An information protection level setting device according to a third aspect is characterized in that, in the information protection level setting device according to the second aspect, a passwordless identifier is stored in a password record and can be attached to a file.

According to a fourth aspect of the information protection level setting method, a password existence determining step of determining whether or not a password is stored in the file at the time of uneditable setting, and a password storing in the file in the password existence determining step. If it is determined that the password matches the password entered by the user, the password match determination step and the password stored in the file are used in this password match determination step. Password stored by the user when it is determined that the password matches the password input by the user and when the password is not stored in the file in the password existence determination step Store step and perform and edit When the password is stored in the file, the password input step is performed to determine whether the password is stored in the file. If the password is stored in the file in the password existence determination step, the password is input by the user. If the password matching judgment step that judges whether the password matches the entered password and that the password stored in the file matches the password entered by the user in this password matching judgment step And a password deleting step of deleting the password stored in the file when the password existence judging step judges that the password is not stored in the file.

According to a fifth aspect of the information protection level setting method, a password record existence judging step for judging whether or not a password record is stored in the file at the time of non-editing setting, and the password record existence judging step for the file are added to the file. When it is determined that a password record is stored, a password matching determination step that determines whether the password stored in that password record matches the password entered by the user, and this password matching determination step When it is determined that the password stored in the password record of the file matches the password input by the user, and in the password record existence determination step, it is determined that the password record is not stored in the file. In that case, the password record storing step of storing the password entered by the user in the password record and storing the password record in the file is executed, and whether or not the password record is stored in the file at the time of editable setting. The password record existence determining step for determining whether the password record exists and the password stored in the password record when it is determined in the password record existence determining step that the password entered by the user In the password matching judgment step for judging whether or not they match, it is judged in the password matching judgment step that the password stored in the password record of the file matches the password input by the user. If and password records in the file with the password records exist determining step is characterized by executing a password record deletion step of deleting the password records stored in the file when it is determined not to be stored.

According to a sixth aspect of the information protection level setting method of the present invention, a password record existence judging step for judging whether or not a password record is stored in the file at the time of non-editing setting, and a password record existence judging step for the password record existence judgment step are performed on the file. When it is determined that a password record is stored, a password existence determination step is performed to determine whether or not a password-less identifier is stored in that password record. In this password existence determination step, the password-free identifier is stored in the password record. If not, the password matching judgment step of judging whether the password stored in the password record matches the password entered by the user, and the file matching judgment step in the password matching judgment step. When it is determined that the password stored in the password record matches the password input by the user, and when it is determined in the password existence determination step that the passwordless identifier is stored in the password record, and the password Password record that stores the password or the passwordless identifier entered by the user in the password record when the record existence determination step determines that the password record is not stored in the file, and stores the password record in the file And a password record existence judging step for judging whether or not a password record is stored in the file at the time of editable setting, and the password record existence judging step If a password record is stored in the file, a password existence determination step is performed to determine whether or not a password-less identifier is stored in that password record. If it is determined that the file is not stored, the password stored in the password record determines whether the password matches the password entered by the user. When it is determined that the password stored in the password record of is the same as the password input by the user and in the password existence determination step, it is determined that the password record has no password identifier. And the password record existence determination step determines that the password record is not stored in the file, a password record deletion step of deleting the password record stored in the file is executed. ..

[0011]

In the information protection level setting device according to claim 1,
The input means inputs a password and various instructions.
The password storage means stores the password input through the input means in a file. The password existence determining means determines whether or not the password is stored in the file. The password matching determination means determines whether or not the password input through the input means and the password stored in the file match. The password deleting means deletes the password stored in the file. When the password is stored in the file, the password stored in the file cannot be deleted or changed unless the password and the password input by the user through the input means match.

In the information protection level setting device of the second aspect, the password is stored in the password record and added to the file. In the information protection level setting device of the third aspect, it is possible to store the passwordless identifier in the password record and add it to the file. In the information protection level setting method according to claim 4, in the non-editable setting, it is judged in the password existence judging step whether or not the password is stored in the file, and in the password matching judgment step, the password is judged in the file. When it is judged that the password is stored, it is judged whether or not the password matches the password entered by the user, and the password stored in the file is judged by the user in the password matching step in the password storing step. The password input by the user is stored in the file when it is determined that the password matches the input password and when it is determined that the password is not stored in the file in the password existence determination step. Also, when editable is set, the password existence determination step determines whether or not a password is stored in the file, and the password matching determination step determines that the password is stored in the file in the password existence determination step. It is determined whether the password matches the password entered by the user, and it is determined in the password deletion step that the password stored in the file in the password matching determination step matches the password entered by the user. If it is determined that the password is not stored in the file in the password existence determining step, the password stored in the file is deleted.

In the information protection level setting method according to the fifth aspect, at the time of uneditable setting, it is judged in the password record existence judging step whether or not the password record is stored in the file, and in the password coincidence judging step it is judged that the password record exists. If it is determined in the step that the password record is stored in the file, it is determined whether the password stored in that password record matches the password entered by the user, and the password is stored in the password record storage step. If it is determined that the password stored in the password record of the file matches the password entered by the user in the match determination step, and the password record exists in the file in the password record existence determination step. If it is determined that the password is not stored, the password entered by the user is stored in the password record and the password record is stored in the file. If it is judged whether the password is stored or not, and if the password record existence judgment step judges that the password record is stored in the file, the user inputs the password stored in the password record. The password stored in the password record of the file in the password record deletion step matches the password entered by the user. Remove password records stored in the file if the password records in the file is determined not to be stored in the case is determined and password records exist determination step.

In the information protection level setting method according to the sixth aspect of the present invention, at the time of uneditable setting, it is judged in the password record existence judging step whether or not the password record is stored in the file, and in the password existence judging step it is judged that the password record exists. When it is judged that the password record is stored in the file in the step, it is judged whether or not the password-less identifier is stored in the password record, and in the password matching judgment step, the password-free identifier is recorded in the password record in the password existence judgment step. When it is determined that the password is not stored, it is determined whether the password stored in the password record matches the password entered by the user, and the password is stored in the password record storage step. When it is judged that the password stored in the password record of the file matches the password entered by the user in the matching judgment step, and when it is judged in the password existence judgment step that no password identifier is stored in the password record. If the password record exists in the password record existence determination step and the password record is not stored in the file, the password entered by the user or the passwordless identifier is stored in the password record, and the password record is stored in the file. When editable is set, in the password record existence judgment step, it is judged whether or not the password record is stored in the file, and in the password existence judgment step, the password record existence judgment step is executed. When it is determined that the password record is stored in the file, it is determined whether or not the passwordless identifier is stored in the password record, and the password existence identifier is determined in the password existence determination step in the password matching determination step. If it is judged that it is not stored, it is judged whether the password stored in the password record matches the password entered by the user, and the password of the file is judged in the password matching judgment step in the password record deletion step. If it is determined that the password stored in the record matches the password entered by the user, and in the password existence determination step, the passwordless identifier is stored in the password record. If it is determined that the password record exists in the file and the password record existence determining step determines that the password record is not stored in the file, the password record stored in the file is deleted.

[0015]

Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a block diagram of an information protection level setting device according to an embodiment of the present invention. The information protection level setting device is composed of a computer main body 1 and an input means 2. The computer body 1 has a password storage means 3
The password existence determining means 4, the password coincidence determining means 5, and the password deleting means 6 are realized by software, and the input means 2 includes a display device 7 including a cathode ray tube, a keyboard, a mouse, and the like. And the input device 8. The input means 2 is for a user to input a password and various instructions. The password storage unit 3 stores the password input through the input unit 2 in a password record and adds the password record to a file. The password existence determining means 4 determines whether or not a password record is stored in the file, and whether or not a password is stored in the password record, that is, whether or not there is no password identifier. The password matching judgment means 5 judges whether or not the password input through the input means 2 and the password stored in the password record of the file match.
The password deleting means 6 deletes the password record stored in the file. The file whose protection level is set by this information protection level setting device detects the password record of the file, prohibits the editing of the file if the password record exists, and permits the editing of the file if the password record does not exist. It is used in computer systems with functions.

Next, the operation will be described with reference to the flowchart of FIG. When setting the protection level, the password presence determining means 4 first causes the display device 7 to display an interactive screen as shown in FIG. 3 (step S1). The interactive screen has a selection button 11 for setting the protection level to be editable by the user and a selection button 12 for setting the protection level to not editable. When the user operates the input device 8 to select the selection button 12, the password existence judging means 4 judges it (step S2), and judges whether or not a password record exists in the file (step S3). .. If the password record exists in the file, the password existence determining means 4 determines whether or not the password exists in the password record, that is, whether or not the passwordless identifier does not exist (step S4), and the password is determined. Is present,
The password coincidence determination means 5 causes the display device 7 to display an interactive screen as shown in FIG. 4 (step S5). In this dialogue screen, there is a text box 13 for the user to input the password. When the user operates the input device 8 to input the password, the password coincidence judging means 5 judges whether or not the inputted password and the password stored in the password record of the file match (step S6). If the passwords match, the password storage means 3 causes the display device 7 to display an interactive screen as shown in FIG. 5 (step S7). In this dialog screen, a text box 14 for the user to enter a new password, a selection button 15 for the user to select to set a password, and a selection for the user not to set a password There is a selection button 16 for doing. The user operates the input device 8 to select the selection button 1
When 5 is selected and a new password is entered in the text box 14, the password storing means 3 judges it (step S8), stores the entered password in the password record (step S9), and stores the password record in the file. (Step S10). Thus the password in the file's password record has been changed. Note that if the file has a password record, the file cannot be edited.

When the user operates the input device 8 to select the selection button 16 in step S7, the password storing means 3 judges it (step S8) and stores the passwordless identifier in the password record (step S8). S11), and proceeds to step S10. If only the English character is accepted as the password, one of the codes other than the English character, for example, the value "0" of 1 byte can be used as the passwordless identifier. Thus, the password in the password record for the file has been deleted. Since the password record itself of the file has not been deleted, the file cannot be edited in this state.

In step S6, if the password entered by the user does not match the password stored in the password record of the file, this routine ends. Therefore, if the user does not know the password stored in the password record of the file, the password cannot be changed or deleted. If there is no password record in the file in step S3 or if there is no password identifier in the password record in step S4, the process proceeds to step S7. Therefore, in this case, the user can freely change or delete the password.

In step S1, when the user operates the input device 8 to select the selection button 11, the password existence judging means 4 judges it (step S2), and whether or not a password record exists in the file. Is determined (step S12). If a password record exists in the file, the password existence judging means 4 judges whether or not the password exists in the password record, that is, whether or not the passwordless identifier does not exist (step S13), and the password. Is present, that is, if there is no password-less identifier, the password coincidence determination means 5 causes the display device 7 to display an interactive screen as shown in FIG. 4 (step S14). When the user operates the input device 8 to input the password, the password coincidence judging means 5 judges whether the inputted password and the password stored in the password record of the file match (step S15). ), If they match, the password deletion means 6 deletes the password record of the file (step S16). Thus the password record for the file is deleted and the file can be edited.

In step S15, if the password entered by the user does not match the password stored in the password record of the file, this routine ends. Therefore, if the user does not know the password stored in the password record of the file, the password record cannot be deleted.

There is no password record in the file in step S12, or in step S12.
If the password does not exist in the password record in 13, that is, if the passwordless identifier exists, the process proceeds to step S16. Therefore, in this case, the user can freely delete the password record.

As described above, when the password is stored in the file, the password stored in the file cannot be deleted or changed unless the password and the password input by the user match. , If the owner of the original file sets a password and makes it uneditable, anyone other than that person will not be able to edit the file even if the file owner changes due to copying etc. It can be well prevented from being destroyed by the wrong owner.

If the password-less identifier can be stored in the password record of the file as in this embodiment, a user using a computer system or the like having the information protection level setting device as in this embodiment can The protection level can be freely changed and made editable, and the user who uses a computer system or the like that does not have the information protection level setting device as in the present embodiment cannot change the protection level and therefore can edit it. Since it is not possible, the range of usage can be expanded.

[0024]

As described above, according to the present invention, when a password is stored in a file, if the password does not match the password entered by the user, the password stored in the file Since it was made impossible to delete or change it, if the owner of the original file sets a password and makes it uneditable, other than that person should be able to edit the file even if the file owner is changed by copying etc. Therefore, it is possible to effectively prevent the contents of the file from being destroyed by a new owner.

If a password-less identifier can be stored in the password record of the file, a user using a computer system or the like equipped with the information protection level setting device according to the present invention can freely change the protection level. A user who uses a computer system that does not have the information protection level setting device according to the present invention cannot change the protection level and therefore cannot edit it. Can be expanded.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an information protection level setting device according to an embodiment of the present invention.

FIG. 2 is a flowchart illustrating an operation of the information protection level setting device according to the exemplary embodiment of the present invention.

FIG. 3 is an explanatory diagram of an example of a dialogue screen by the information protection level setting device according to the embodiment of the present invention.

FIG. 4 is an explanatory diagram of an example of a dialogue screen by the information protection level setting device according to the embodiment of the present invention.

FIG. 5 is an explanatory diagram of an example of a dialogue screen by the information protection level setting device in the embodiment of the present invention.

FIG. 6 is a configuration diagram of a conventional file.

FIG. 7 is a flowchart illustrating a procedure of a conventional information protection level setting method.

[Explanation of symbols]

 2 input means 3 password storing means 4 password existence judging means 5 password coincidence judging means 6 password deleting means

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Takayo Yamanaka 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (6)

[Claims] 1. An input means for inputting a password or various instructions, and a password storage means for storing the password input through the input means in a file,
Password existence determining means for determining whether or not a password is stored in the file, and password matching for determining whether or not the password input through the input means and the password stored in the file match The storage device further comprises a judging means and a password deleting means for deleting the password stored in the file. When the password is stored in the file, the password and the password input by the user through the input means are combined. An information protection level setting device characterized in that the password stored in the file cannot be deleted or changed unless otherwise. 2. The information protection level setting device according to claim 1, wherein the password is stored in a password record and added to the file. 3. The information protection level setting device according to claim 2, wherein a passwordless identifier is stored in the password record and can be added to the file. 4. A password existence judging step for judging whether or not a password is stored in the file at the time of setting uneditable, and a case where it is judged in the password existence judging step that the password is stored in the file. In the password matching judgment step for judging whether the password matches the password entered by the user, and the password stored in the file in this password matching judgment step matches the password entered by the user. If the password is not stored in the file in the password existence determination step and the password stored in the file is stored in the file in the password existence determination step At the time of setting, the password is If there is a password existence determining step that determines whether the password is stored, and if the password is determined to be stored in the file in this password existence determining step, whether the password matches the password input by the user In the password matching judgment step for judging whether or not it is judged that the password stored in the file matches the password input by the user in the password matching judgment step and in the password existence judging step, And a password deleting step of deleting the password stored in the file when it is determined that the file does not store the password. 5. A password record existence determining step of determining whether or not a password record is stored in the file when setting the edit disabled, and determining that the password record is stored in the file in the password record existence determining step. If the password stored in that password record matches the password entered by the user, the password matching judgment step and the password matching judgment step stored in the password record of the file are performed. Password entered by the user when it is determined that the existing password matches the password entered by the user, and when it is determined that the password record does not exist in the file in the password record existence determining step. A password record existence judgment that stores the password record in the password record and stores the password record in the file, and executes the password record storing step to determine whether the password record is stored in the file when the file is editable. If it is determined in the step and this password record existence determination step that the password record is stored in the file, check whether the password stored in the password record matches the password input by the user. The password matching judgment step for judging, and the case where it is judged that the password stored in the password record of the file matches the password entered by the user in this password matching judgment step and the password record existence Information protection level setting method characterized by performing the password record deletion step of deleting the password records password records in the file at decision step is stored in the file when it is determined not to be stored. 6. A password record existence determining step of determining whether or not a password record is stored in the file when setting the edit disabled, and determining that the password record is stored in the file in the password record existence determining step. Password existence judgment step to judge whether or not the password-less identifier is stored in that password record, and the password when it is judged in this password existence judgment step that the password-less identifier is not stored The password matching judgment step of judging whether or not the password stored in the record matches the password entered by the user, and the password matching judgment step stored in the password record of the file in this password matching judgment step. When it is determined that the password matches the password input by the user, when the password existence determination step determines that a passwordless identifier is stored in the password record, and when the password record existence determination step determines the file. If the password record is not stored in the password record, the password entered by the user or the passwordless identifier is stored in the password record and the password record is stored in the file. At the time of enable setting, a password record existence judging step for judging whether or not a password record is stored in the file, and the password record existence judging step stores the password record in the file. If it is determined that the password-less identifier is stored in the password record, it is determined whether the password-existing identifier is stored in the password record. In this password-existing determination step, it is determined that the password-less identifier is not stored in the password record. If the password stored in the password record is stored in the password record of the file in the password matching determination step that determines whether the password stored in that password record matches the password entered by the user. If it is determined that the existing password matches the password input by the user, it is determined that the password-less identifier is stored in the password record in the password existence determining step, and the password recording Information protection level setting method characterized by performing the password record deletion step of deleting the password records password records in the file in the presence judgment step is stored in the file when it is determined not to be stored.