JPS62237483A - Encoding and reading of information - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in a method for encrypting and decoding information in which codes are exchanged via various communication means.

[Conventional technology]

2. Description of the Related Art Conventionally, encrypted transmitting/receiving apparatuses have been known that prevent the interception of information to be transmitted to the other party by encrypting the information.

FIG. 5 shows a cryptographic transmitting/receiving device according to the prior art.

In the figure, IA and IB indicate computer systems. These computer systems IA and IB send and receive encrypted information to the means 2.
It is used to send information to the other party or receive information sent by the other party.

The transmitting/receiving means 2 will be explained below.

The transmitting/receiving means 2 includes a pair of encryption devices 3A.

3B, a pair of modem devices 4, 4, and a communication means 5 such as a public line that connects the two modem devices 4.4. Here, the - side encryption device 3A encrypts the information output by the - side computer system IA, and decodes the encrypted information sent from the other side computer system A I B to extract the information. It is to take out. The encryption device 3B on the other side encrypts the information output by the computer system IB on the other side, and decrypts the encrypted information sent from the computer system IA in the above example to extract the information. be.

The modem device 4.4 also includes each of the encryption devices 3A.
, 3B is used to modulate the encrypted information outputted by the communication means 5 so as to be compatible with the communication means 5.

Next, the configuration of the encryption device 3A will be explained based on FIG. 6. The configuration of the encryption device 3B on the other side is as follows.
Since it is the same as the encryption device 3A described above, the explanation will be omitted.

6 indicates a control circuit. The control circuit 6 stores a method for encrypting and decoding information, and controls the bit matching circuit 7 based on the method.

The bit matching circuit 7 encrypts information by adding dummy bits, and decrypts the information by deleting the dummy bits. here,
The information becomes meaningless encrypted information due to the addition of the meaningless dummy bits. Such encryption and decryption techniques will be explained based on FIG.

First, a indicates information. b indicates encrypted information.

The encrypted information is dummy bits DO, D in the information a.
Obtained by adding I.

Further, c and d similarly indicate encrypted information. Furthermore, the decoding of information a means the above-mentioned encrypted information.

This means to delete the dummy bits Do and DI from d.

The positions at which the dummy signals Do and DI are added are determined based on instructions from the control circuit 6.

In addition, when encrypting and decoding information, both encryption devices 3
The same method (bit pattern) is stored in the control circuits 6.6 of A and 3B. Therefore, the control circuit 6 can recognize which bit is the dummy bit during decoding.

Further, in FIG. 6, reference numeral 8.9 indicates a pair of transmitting/receiving buffer circuits. The transmission/reception buffer circuit 8 serves as a reception buffer for information from the computer system IA when the encryption bag 713A is transmitting, and when the encryption device 3A is receiving,
It serves as a buffer for transmitting information to the computer system IA. On the other hand, the transmission/reception buffer circuit 9 is an encryption bag? ! i3A
When the encryption device 3A is transmitting, it serves as a buffer for transmitting information to the other computer system IB, and when the encryption device 3A is receiving, it serves as a buffer for receiving information from the other computer system IB.

[Problem that the invention seeks to solve]

However, the cryptographic transmitter/receiver according to the prior art has the following problems.

In other words, the data length of the encrypted data is longer by the amount of dummy bits than the data that is actually being sent, resulting in lower transmission efficiency and longer line usage times. there were.

Therefore, the present invention has been made in view of the above-mentioned circumstances, and its purpose is to make the data length of the data actually transmitted and the data length on the transmission path the same, so that the transmission efficiency is high and the encryption can be made complex. The purpose is to obtain a method for encrypting and decoding information.

[Means for solving problems]

In the present invention, encrypted information is created by changing the arrangement of the bit data of the information, and the above-mentioned original information is obtained by restoring the arrangement of the bit data.

[Effect]

Information becomes meaningless encrypted information by changing the arrangement of bit data. In addition, the original information can be obtained by restoring the arrangement of the bit data.

〔Example〕

Embodiments of the present invention will be described below with reference to FIGS. 1 to 4. Note that the same components as those in the prior art are given the same reference numerals, and the description thereof will be omitted.

The present embodiment will be described on the assumption that five pieces of 5-bit information are encrypted and transmitted/received.

Therefore, the computer system IA outputs five pieces of information each consisting of five bits.

Further, numeral 11 indicates an encryption device according to the present invention.

A pair of encryption devices 11 are provided via communication means 5. Here, the encryption device 11 encrypts the information output from the computer system IA, and decrypts the encrypted information sent from the other computer system '2AN to extract the information.

The above-mentioned encryption device 11 is also provided in the computer system IB on the other side, but since they have the same configuration, one encryption device 11 will be explained below.

Therefore, 12 has five buffer areas P, P, ・
. . . shows a first buffer circuit having .

Further, 13 indicates a matrix buffer circuit.

The matrix buffer circuit 13 has 25 7-trix areas A1. A2. ..., Bl, B2゜...,
C1, C2,..., DI, D2. ...El, B
2. ... are formed in a matrix shape.

14 indicates a second buffer circuit having five buffer regions Q, Q, . . . .

15 is the above-mentioned No. 1. It is composed of a second buffer circuit 12.14 and a decoding means 17 which functions when controlling the matrix buffer circuit 13.

Next, the above-mentioned encryption means 16 and decryption means 17 will be explained.

Here, the encryption means 16 controls the first buffer control means 18 that controls the first buffer circuit 12, the matrix control means 19 that controls the matrix buffer circuit 13, and the second buffer circuit 14. It is composed of a second buffer control means 20.

The first buffer control circuit 18 inputs the information (consisting of 5 bits each) from the computer system LA to the first buffer circuit 12 one by one.

Further, the matrix control means 19 is composed of an information input means 21 and an encrypted information successive output means 22.

The information input means 21 inputs the information input to the first buffer circuit 12 to the matrix buffer circuit 13.
The information is input sequentially into column A, column B, and so on.

The first buffer control means 18 transfers one piece of information from the computer system 1 to the first buffer each time the information in the first buffer circuit 12 is transferred to the matrix buffer circuit 13 by the information input means 21. circuit 1
2. Further, the encrypted information successive output means 22 stores the matrix areas At, A2 . ..., B1. B2.
The contents of . . . , .
This is what you input. In this case, the above-mentioned extraction means the above-mentioned matrix areas AI, A2. ..., Bl.

B2. . . . , for example, the matrix areas AI, B3 . C2, D5. The purpose is to read the contents of B4, and as will be described later, this data string is sent to the receiving side as encrypted information. In this case, since there are five pieces of information, the above extraction is performed five times.

This means that the information becomes a meaningless data string and is encrypted. Further, the second buffer control means 20 outputs the encrypted information input to the second buffer circuit 14 to the modem device 4. Here, the encrypted information successive output means 22 includes the second buffer circuit 14
Each time the encrypted information within is output to the modem device 4, it is read out from the matrix buffer circuit 13. Note that the modem device 4 modulates the encrypted information to match the communication means 5, or demodulates the encrypted information transmitted via the communication means 5.

On the other hand, the decoding means 17 includes the second buffer circuit 14
a third buffer control means 23 for controlling the matrix buffer circuit 13; a second matrix control means 24 for controlling the matrix buffer circuit 13; and a fourth buffer control means 24 for controlling the first buffer circuit 12.
It is composed of a buffer control means 25.

The third buffer control means 23 inputs encrypted information from the modem device 4 to the second buffer circuit 14 one by one. The second matrix control means 24 also includes an encrypted information input means 26 and an information output means 2.
It consists of 7. Here, the encrypted information input means 26 inputs each bit data of the encrypted information to each matrix area AI of the matrix buffer circuit 13.
.

A2. ..., B1. B2. . . . are input in sequence. In this case, the input is performed based on a predetermined input pattern. The input pattern is the same as the successive pattern used by the encrypted information successive output means 22. In this case, the above-mentioned human cover turn and successive pattern of one encryption device 11 do not necessarily have to be the same, but the information successive pattern of one encryption device 11 and the encryption device of the other side computer system IB do not necessarily have to be the same. It is necessary that the input cover pattern of No. 11 is the same.

Therefore, the matrix area AI is located at the same position where the encrypted information successive means 22 on the transmitting side extracted the bit data from the matrix buffer circuit 13.

A2. ..., Bl, B2. Each bit data of the encrypted information is input to . . . , . Here, the third buffer control means 23 controls the second buffer circuit 14 every time the encrypted information input to the second buffer circuit 14 is sequentially transferred to the matrix buffer circuit 13 by the encrypted information input means 24. The buffer circuit 14 is configured to input encrypted information one by one from four using a modem. Further, the information reading means 27
are columns A and B of the matrix buffer circuit 13.

It is configured to sequentially transfer information to the first buffer circuit 12 in the order of 0 column, D column, and E column. The bit data string input to the first buffer circuit 12 becomes information after decoding. Further, the fourth buffer control means 25 sequentially transfers the information input to the first buffer circuit 12 to the computer system 1.

Next, the effect will be explained.

a2+...', bl, b2. ..., cl, c
2°..., dl, d2. ...,el,C2,・
Suppose we output...

Then, these five pieces of information are stored in the first buffer control means 1.
8, the signals are input to the first buffer circuit 12 one by one as shown in FIG. Then, the information input means 21 of the first matrix control module 19 inputs the above information to the matrix buffer circuit 13 in order from column A, as shown in the figure. In this case, the information tu of ■ is input in each column.

Thereafter, the encrypted information successive means 22, as shown in FIG.
Based on a predetermined information successive pattern, each matrix area AI, A2 .
..., Bl, B2. ..., C1, C2, ...
, Di, B2. ..., El.

B2. ... are extracted and input to the second buffer circuit 14. Here, for example, in the same figure, 7
Trix area A2. B5. The contents of CI, B3° and B5 are extracted. As a result, the second buffer circuit 1
4 contains meaningless encrypted information.

Thereafter, the encrypted information is input to the modem device 4,
After being modulated, it is sent to the communication means 5.

In this embodiment, since it is assumed that five pieces of information are to be transmitted, the above operation is repeated five times.

Next, the operation when the other encryption device 11 inputs encrypted information and decrypts the information will be explained.

First, assume that the first piece of encrypted information is input to the second buffer circuit 14, as shown in FIG.

Then, each bit data of the encrypted information is stored in the matrix areas AI and A2 of the matrix buffer circuit 13.
．． ..., Bl, B2. ..., CI, C2
,..., DI, B2. ..., El.

B2. . . , are sequentially input into a predetermined matrix area based on the informant's cover turn. In this case, 1
The encrypted information is stored in the matrix area A2. B5. CI,
B3. It is input to B4.

In this way, five pieces of encrypted information are sequentially input to the matrix buffer circuit 13. Thus, the information in the decoded state is input to the A column, B column, 0 column, D column, and E column of the matrix buffer circuit 13. The contents of the matrix buffer circuit 13 in this state are the same as the contents of the matrix buffer circuit 13 shown in FIG.

Thereafter, the information in the matrix buffer circuit 13 is sequentially fetched from the A column to the computer system 1 via the first buffer circuit 12, thereby obtaining five pieces of information.

In the above embodiment, one encryption device 11 has the encryption means 16 and the decryption means 17, but for example, the encryption means 16 is provided in the - side computer system IA,
The encrypted information may be transmitted in one direction by providing the decryption means 17 in the computer system 1'B on the other side.

〔Effect of the invention〕

As explained above, according to the present invention, encrypted information is created by changing the arrangement of bit data of the information, and
Since the above-mentioned optical information is obtained by restoring the bit data arrangement, on the transmitting side, by changing the bit data arrangement of the information, the information becomes meaningless code or information, and On the receiving side, the original information can be obtained by restoring the bit data arrangement.

According to the present invention, the encrypted information is created by changing the arrangement of the bit data of the information, so the number of bits of the encrypted information does not increase as in the prior art. Therefore, the transmission efficiency is improved, and as a result, the usage time of the line etc. is shortened.

[Brief explanation of drawings]

1 to 4 relate to an embodiment of the present invention, FIG. 1 is a block diagram, FIGS. 2 to 4 are action explanatory diagrams, and FIGS. 5 to 7 are prior art. 5 is an overall diagram of the encrypted information transmission/reception system, FIG. 6 is a block diagram of the vicinity of the encryption device, and FIG. 7 is an explanatory diagram illustrating the operation of the prior art. ■...Computer system, 11...Control circuit, 13.
...Matrix buffer circuit. Agent Masuo Oiwa (2 idiots) Figure 3 Figure 4 Figure 1 [31ha Figure 6 Cheek A Figure 7 (+)) Idiot; 1) TI4I Summoning Procedures Amendment (Voluntary) Nichisho Kazu 6 Pancreas January 198 2. Name of the invention ↑ Shizuka's encryption and decoding method 3. Person making the amendment Representative Moriya Shiki 4. Agent Address: Mitsubishi Electric Corporation, 2-2-3 Marunouchi, Chiyoda-ku, Tokyo 41st Street, \5 Column for detailed explanation of the invention subject to amendment. 6. Contents of amendment (1) Specification No. On page 15, line 16, "cipher or information" should be corrected to "encrypted information."

Claims (1)

[Claims] An information encryption method that creates encrypted information by encrypting one or more pieces of information composed of a plurality of bit data arrays, and then decrypts the encrypted information to obtain the original information. The encrypted information is created by changing the arrangement of the bit data of the information, and the original information is obtained by restoring the arrangement of the bit data. methods for encrypting and decoding information.