JPH09149023A - Information communication processor and information communication processing method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a security protection level in the communication processing of information by arbitrarily changing a ciphering system on a transmission side. SOLUTION: A ciphering system management means 14 stores the offset value of the ciphering system table 11 of a ciphering/deciphering means selected in a selection means 13 and informs the connected information communication processor 2 on an opposite side (reception side) of it by using a communication means 12. Then, the cipering system magagement means 14 ciphers and deciphers data by using the selected ciphering/deciphering means relating to data transmission and reception thereafter. Then, the ciphering system management means 24 stores the offset value of the ciphering system table 11 received by the communication means 22 and the selection means 23 selects the corresponding ciphering/deciphering means from the ciphering system table 21. Then, the ciphering system management means 24 ciphers and deciphers the data by using the selected ciphering/deciphering means relating to the data transmission and reception thereafter.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information communication processing apparatus and an information communication processing method for exchanging character data and image / voice data such as credit numbers and confidential documents.

[0002]

2. Description of the Related Art In recent years, the demand for preventing the leakage of confidential documents has increased as the social organization has become complicated. By the way, in the conventional information communication processing apparatus, the data to be handled is not encrypted or is encrypted by a single or plural fixed encryption method. Moreover, the same encryption method is often used in the same network.

[0003]

However, in the above-described conventional information communication processing apparatus, an encryption method sufficient to prevent the leakage of confidential information is not used, and some or all of the digital data and voice are not used. There is a problem in that there is a high possibility that data and image data will be leaked.

In this information communication processing apparatus, it is required that it is difficult to decipher and there is little possibility of leakage of confidential information.

The present invention provides an information communication processing apparatus that is extremely unlikely to leak confidential information due to difficulty in decryption, and an information communication processing method that is extremely unlikely to leak confidential information due to difficulty in decryption. With the goal.

[0006]

In order to achieve this object, the present invention provides an encryption method table in which a plurality of encryption / decryption means are tabulated, and one encryption / decryption method from the encryption method table according to a predetermined rule. It is configured to have a selection means for selecting the decryption means and an encryption method management means for notifying the other party of the offset value of the encryption method table of the selected encryption / decryption means.

As a result, it is possible to obtain an information communication processing device in which the possibility of leakage of confidential information due to the difficulty of decoding is extremely small.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is an encryption method table in which a plurality of encryption / decryption means are tabulated, and one encryption / decryption is performed from the encryption method table according to a predetermined rule. The transmission means includes a selection means for selecting an encryption means and an encryption method management means for notifying the other side of the offset value of the encryption method table of the selected encryption / decryption means. This has the effect that the conversion method is arbitrarily changed.

According to a second aspect of the present invention, in the first aspect of the invention, the encryption method management means holds different offset values on the self side and the other side, and is connected. The information communication processing device has a function of transmitting by independent encryption methods.

According to a third aspect of the invention, in the first aspect of the invention, the encryption method management means changes the offset value at a predetermined time interval and notifies the other side. , Has the effect that the encryption method is changed periodically.

According to a fourth aspect of the invention, in the first aspect of the invention, the encryption method management means changes the encryption method table at a predetermined time interval, and the changed encryption method table The offset value of the encryption method table is selected and the selected encryption method table and the selected offset value are notified to the other party. It also has the effect of changing the encryption method table.

According to a fifth aspect of the present invention, a selecting step of selecting one encryption / decryption means from a plurality of encryption method tables according to a predetermined rule, and an encryption method table of the selected encryption / decryption means. And an encryption method management step of notifying the other party of the offset value of 1., which has an effect of arbitrarily changing the encryption method on the transmission side.

Hereinafter, an embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. (Embodiment 1) FIG. 1 is a block diagram showing an information communication processing apparatus according to an embodiment of the present invention.

In FIG. 1, reference numerals 1 and 2 are information communication processing apparatuses for exchanging character data such as confidential documents and image / voice data, and 11 and 21 are tables of encryption / decryption means of the information communication processing apparatuses 1 and 2. , An encryption method table having the same contents, 12 and 22 are communication means for transmitting and receiving encrypted data, 13 and 23 are selection means for selecting and storing encryption / decryption means, and 14 and 24 are selected. The encryption / decryption means is an encryption method management means for notifying one another to the other or mutually. The encryption / decryption means is means for performing encryption and decryption, and the encryption method tables 11 and 2
The information communication processing device 1, 2 is specified by the offset value of 1.
There are as many links as the nodes configuring each of the.
The offset value is a number value such as 1a, i, and n shown in FIG.

The operation of the information communication processing apparatus configured as described above will be described below with reference to FIG. FIG.
FIG. 2A is a flowchart on the transmitting side for explaining the operation of the present embodiment, and FIG. 2B is a flowchart for the receiving side for explaining the operation of the present embodiment. First, FIG.
The operation of the information communication processing device on the transmission side shown in (a) will be described. Here, it is assumed that the information communication processing device 1 is the transmitting side and the information communication processing device 2 is the receiving side. Selection means 13 on the transmission side
Selects one encryption / decryption means from the encryption method table 11 according to the specification of the user or some rule defined by the user (S1, selection step). The certain rule defined by the user is, for example, a rule of switching the encryption method for each session. Next, the encryption method management means 14 stores the offset value of the encryption method table 11 of the encryption / decryption means selected by the selection means 13, and uses the communication means 12 to connect to the other party (reception side). The information communication processing device 2 is notified (S2, encryption method management step). Next, the encryption method management means 14
Performs data encryption and decryption using the selected encryption / decryption means for subsequent data transmission / reception (S
3).

Next, the operation of the information communication processing device 2 on the receiving side shown in FIG. 2B will be described. The encryption method management means 24 stores the offset value of the encryption method table 11 received by the communication means 22, and the selection means 23 selects the corresponding encryption / decryption means from the encryption method table 21 (S11). Next, the encryption method management means 24
Performs encryption and decryption of data using the selected encryption / decryption means for the subsequent data transmission / reception (S1
2).

As described above, according to the first embodiment, the information communication processing devices 1 and 2 on the transmitting side and the receiving side according to the encryption method designated by the transmitting side perform information communication processing (encryption and decryption processing). I do. That is, both the information communication processing devices 1 and 2 perform communication processing by the same encryption method.

As described above, according to the first embodiment, the encryption method can be arbitrarily changed on the transmitting side.
It is possible to improve the security level in the communication processing of information.

(Second Embodiment) The configuration of the information communication processing apparatus according to the second embodiment is the same as that of FIG. 1, but the operation is different.

The operation of the information communication processing apparatus according to the second embodiment configured as described above will be described with reference to FIGS. 3 and 4. FIG. 3 is a schematic operation explanatory view schematically showing the operation of the second embodiment, and FIG. 4 is a flowchart for explaining the operation of the second embodiment.

FIG. 3 shows a time transition when data communication is performed between the information communication processing devices 1 and 2. Time t1 to t2
When sending and receiving, different encryption methods (1),
Data communication is performed according to (2).

The operation of the second embodiment will be described in detail with reference to FIG. First, the selection means 13 and 23 select one encryption / decryption means from the encryption method tables 11 and 21 according to the user or some rule defined by the user (S21). Next, the encryption method management means 14 and 24
The offset values of the encryption method tables 11 and 21 of the encryption / decryption means selected by the selection means 13 and 23 are stored, and the communication means 12 and 22 are used to connect to the information communication processing devices 1 and 2 on the partner side. Notify (S22). The encryption method management means 14 and 24 perform data encryption and decryption using the selected encryption / decryption means with respect to the subsequent data transmission to the other side information communication processing devices 1 and 2 (S23).
Next, the encryption method management means 14 and 24 are the communication means 1
2 and 22 store the offset values of the encryption method tables 21 and 11 received from the counterpart apparatuses 1 and 2, and the selection means 13 and 23 select the corresponding encryption / decryption means from the encryption method tables 11 and 21. Yes (S24). The encryption method management means 14, 24 selects the selected encryption / reception method for the subsequent data reception from the other side information communication processing devices 1, 2.
Data is encrypted and decrypted using the decryption means (S25).

As described above, according to the second embodiment,
Since the connected information communication processing devices 1 and 2 can be transmitted by mutually independent encryption methods, it is possible to use different encryption methods for transmission and to make decryption more difficult. The security level can be further improved.

(Third Embodiment) The configuration of the information communication processing apparatus according to the third embodiment is the same as that of FIG. 1, but the operation is different.

The operation will be described below with reference to FIGS. 5, 6 and 7.
This will be described with reference to FIG. FIG. 5 is a schematic operation explanatory view schematically showing the operation of the third embodiment, and FIGS. 6 and 7 are flowcharts for explaining the operation of the third embodiment on the transmitting side and the receiving side.

FIG. 5 shows a time transition when data communication is performed between the information communication processing devices 1 and 2. Time t1 to t
At 2, t2 to t3 and t3 to t4, data communication is performed by different encryption methods (1), (2) and (3).

The operation of the third embodiment will be described in detail with reference to FIG. 6 on the transmitting side. FIG. 6 shows the communication processing operation in the information communication processing device on the transmission side after connection, and here, the information communication processing device 1 is the transmission side and the information communication processing device 2 is the reception side. First, the encryption method management means 14 as a determination means determines whether to switch the encryption / encoding means set in advance by the user, that is, whether it is time to switch the encryption method (S31). If it is not the time to switch, the standby state is entered. At the timing of switching, the encryption method management means 14 stores the offset value of the encryption method table 11 of the encryption / decryption means specified by the user in advance, and the other side to connect using the communication means 12 (Reception side) The information communication processing device 2 is notified (S32). Encryption method management means 14
Performs data encryption and decryption using the designated encryption / decryption means for subsequent data transmission / reception with the other party information communication processing device 2 (S33).

The operation of the third embodiment will be described in detail with reference to FIG. 7 on the receiving side. FIG. 7 shows a communication processing operation in the reception side information communication processing device 2 after connection. First, the encryption method management means 24 stores the offset value of the encryption method table 11 received by the communication means 22, and the selection means 23 uses the encryption method table 21 to select the corresponding encryption value.
A decryption means is selected (S41). The encryption method management means 24 relates to subsequent data transmission / reception with the other party information communication processing device 1, and the selected encryption / decryption means on the encryption method table 21 (that is, designated on the encryption method table 11). The data is encrypted and decrypted using the encryption / decryption means) (S42).

As described above, according to the third embodiment,
By changing the encryption / decryption means at the timing of switching the encryption / encoding means set in advance by the user, that is, by changing the offset value at a predetermined time interval, it is possible to make decryption more difficult. Therefore, it is possible to further improve the security level.

(Embodiment 4) The configuration of the information communication processing apparatus according to the fourth embodiment is the same as that of FIG. 1, but the operation is different.

The operation will be described below with reference to FIGS. 8 and 9. 8 and 9 are flowcharts for explaining the operation of the fourth embodiment on the transmitting side and the receiving side.

The operation of the fourth embodiment will be described with reference to FIG. 8 on the transmitting side. FIG. 8 shows the communication processing operation in the information communication processing device 1 on the transmission side after connection, and here, the information communication processing device 1 is the transmission side and the information communication processing device 2 is the reception side. First, the encryption method management means 14 as a determination means determines whether to switch the encryption / encoding means set in advance by the user, that is, whether it is time to switch the encryption method (S51). If it is not the time to switch, the standby state is entered. At the timing of switching, the encryption method management unit 14 stores the encryption method table (new changed encryption method table) designated by the user in advance, and further selects the selected encryption / decryption. The other side, which stores the offset value of the new encryption method table of the means, connects the specified new encryption method table and the selected offset value on the new encryption method table using the communication means 12. (Reception side) Notify the information communication processing device 2 (S5)
2). The encryption method management unit 14 encrypts and decrypts data by using the selected encryption / decryption unit on the specified encryption method table, regarding subsequent data transmission / reception with the other party information communication processing device 2. Is performed (S53).

The operation of the fourth embodiment will be described with reference to FIG. 9 on the receiving side. FIG. 9 shows the communication processing operation in the receiving side information communication processing device 2 after connection. First, the encryption method management means 24 stores the new encryption method table received by the communication means 22 (S61). next,
The encryption method management means 24 stores the selected offset value on the new encryption method table received by the communication means 22, and the selection means 23 stores the encryption method table 2.
The corresponding encryption / decryption means is selected from 1 (S6
2). The encryption method management means 24 relates to the subsequent data transmission / reception with the other party information communication processing device 1, and uses the selected encryption / decryption means on the designated new encryption method table to encrypt and Decrypt (S6
3).

As described above, according to the fourth embodiment,
Not only the encryption / decryption means but also the encryption method table is switched at the timing of the encryption / encoding means switching set in advance by the user, that is, not only the offset value of the encryption method table but also the encryption method is set at a predetermined time interval. By changing the encryption method table as well, it becomes possible to protect the confidentiality by making the decryption impossible.

[0035]

As described above, according to the information communication processing apparatus of the present invention, the encryption method can be arbitrarily changed on the transmitting side, so that the security level in the information communication processing can be improved. An advantageous effect that a different information communication processing device can be realized is obtained. Further, since the connected information communication processing devices can transmit by independent encryption methods, it is possible to use different encryption methods for transmission, which makes decryption more difficult. As a result, the advantageous effect that the information communication processing apparatus capable of further improving the security level can be realized can be obtained. Further, since the encryption method can be changed periodically, it is possible to make the decryption more difficult and to realize the information communication processing apparatus capable of further improving the security protection level. That is an advantageous effect. Furthermore, it is possible to change not only the offset value of the encryption method table but also the encryption method table at a specified time interval, making it impossible to decipher the information and ensure complete security protection. The advantageous effect that the processing device can be realized is obtained.

According to the information communication processing method of the present invention, since the encryption method can be arbitrarily changed on the transmitting side, an information communication processing method capable of improving the security protection level in the information communication processing is provided. The advantage is that it can be realized.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an information communication processing device according to an embodiment of the present invention.

FIG. 2A is a flowchart on the transmitting side for explaining the operation of the present embodiment. FIG. 2B is a flowchart on the receiving side for explaining the operation of the present embodiment.

FIG. 3 is a schematic operation explanatory view schematically showing the operation of the second embodiment.

FIG. 4 is a flowchart for explaining the operation of the second embodiment.

FIG. 5 is a schematic operation explanatory view schematically showing the operation of the third embodiment.

FIG. 6 is a flowchart for explaining the operation of the third embodiment on the transmission side.

FIG. 7 is a flowchart for explaining the operation of the third embodiment on the receiving side.

FIG. 8 is a flowchart for explaining the operation of the fourth embodiment on the transmitting side.

FIG. 9 is a flowchart for explaining the operation of the fourth embodiment on the receiving side.

[Explanation of symbols]

 1, 2 Information communication processing device 11, 21 Encryption method table 12, 22 Communication means 13, 23 Selection means 14, 24 Encryption method management means

Claims (5)

[Claims] 1. An encryption method table in which a plurality of encryption / decryption means are tabulated, selection means for selecting one encryption / decryption means from the encryption method table according to a predetermined rule, and the selected means. An information communication processing device comprising: an encryption method management means for notifying the other party of the offset value of the encryption method table of the encryption / decryption means. 2. The information communication processing apparatus according to claim 1, wherein the encryption method management means holds the offset value that is different between the self side and the other side. 3. The information communication processing apparatus according to claim 1, wherein the encryption method management means changes the offset value at a predetermined time interval and notifies the other party. 4. The encryption method management means changes the encryption method table at a predetermined time interval, selects an offset value of the changed encryption method table, and changes the encryption method. The information communication processing apparatus according to claim 1, wherein a method table and the selected offset value are notified to the other party. 5. A selecting step of selecting one encryption / decryption means from a plurality of encryption method tables according to a predetermined rule, and an offset value of the encryption method table of the selected encryption / decryption means. An information communication processing method including an encryption method management step of notifying the side.