JPS63100841A - Transmission and reception equipment for cryptographic code - Google Patents

Abstract

PURPOSE:To secure the information sent to the reception side by providing an encrypted/detected KANJI (Chinese character) ROM comprising a KATAKANA (square-form Japanese syllabary)/KANJI conversion table so as to convert a plain sentence into a KANJI sentence without any meaning or vice versa. CONSTITUTION:In sending a transmission plain sentence 'it is fine today' with encryption, a KATAKANA conversion section 2 converts the sentence into a KATAKANA sentence 3 and sends the result to a transmitter 4. The transmitter 4 ciphers the KATAKANA sentence 3 by using the encrypted/decoded KANJI ROM 7 and a cryptographic sentence 'east, west, south, north, upper, lower, left, right' to a receiver 9 via a communication lien 8. In applying the ciphering, a KATAKANA 'ki' calls an address (c) at a coordinate X-2, Y-2 of the 'ki' of the KATAKANA/KANJI conversion table 6 programmed in the encrypted/decoded KANJI ROM 7. Then a KANJI 'east' registered at an address (d) corresponding to the address (c) of the coordinate X-2, Y-2 is called and ciphered.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cryptographic transceiver that encrypts and transmits and receives information that requires confidentiality.

[Conventional technology]

Conventionally, in a communication network that utilizes all public communication lines, a large number of information is converted into EDP and transmitted to the receiving side via this public communication line. Is the transmitted information confidential?Ninth, it can be read by a third party: Encrypt it and send it.

[Problem that the invention attempts to solve]

The above-mentioned conventional cryptographic transmitter/receiver has a limited range of use, is not suitable for widespread use, is not suitable for mass production of devices, and has problems such as high cost.

[Ninth way to solve the problem]

The cipher transmitter/receiver of the present invention has the same encoding/decoding kanji ROM'i on the transmitting side and the receiving side.
Ordinary sentences can be easily encrypted and decrypted into meaningless kanji characters, and vice versa.

[For production]

The present invention can maintain the confidentiality of information transmitted to the receiving side via the communication line ik.

〔Example〕

FIG. 1 is a block diagram showing an embodiment of a cryptographic transceiver according to the present invention. In the figure, 1 is the sentence to be sent, such as ``Today is sunny'', and the following sentences are simply referred to as sending plain sentences), 2 is the sending plain sentence 1 Kinkata kana sentence 32, for example, ``Kiyouwa Redes'' Katakana conversion part to convert, 4
The katakana/kanji shown in Figure 2 is to combine Katakana sentence 3, for example, "Kiyouwa...Ledes", with two arbitrary kanji characters and encode it into meaningless Kanji cipher text 51, for example, "East, West, South, top, bottom, left, right." Encrypted/decrypted Kanji RO consisting of conversion table 6
Equipped with M7, 1 transmitter, 8t- for communication line, 9, received kanji ciphertext 5, for example, "east, west, south, north, top, bottom, left and right", katakana sentence 1
0 Receiver equipped with the above-mentioned encrypted/decrypted kanji ROM 7 for decoding (deciphering) ``Kiyouwaharedesu'', for example, 11
10 is the decoded katakana sentence 10, for example, ``Kiyowaharedesu'', which is converted into Zenon tsutsuko ``Today is sunny'', and 12 is the received 7t-W tsuko.

Next, the operation of the code transmitter/receiver according to the above-mentioned method will be explained. First, when sending the outgoing ordinary exchange ``Today is sunny'', the katakana conversion unit 2 converts the outgoing ordinary exchange ``Today is sunny'' into the katakana sentence 3 ``Kiyou wa Haredesu'' and sends it to the transmitter. Output to 4.

Therefore, the transmitter 4 encrypts this Katakana sentence 3kllft into the encrypted/decoded Kanji ROM 7 and transmits the ciphertext 5 "east, west, south, north, top, bottom, left and right" to the receiver 9 via the communication line 8. However, when using this encryption, the katakana "ki" is
The C address of the position X-2, Y-2 of "K" in the Katakana/Kanji conversion table 6 programmed in the decoded Kanji ROM 7 is called. Then, the C address of X-2, Y-2 is registered at the corresponding address d, and the kanji 7'C ``東'' is called and encrypted. In the same manner, by sequentially encrypting the characters, it is possible to create the cipher text "east, west, south, north, top, bottom, left, and right" for the Lji/katakana sentence "Kiyouwaharedesu".

Next, the receiver 9 receives the fc ciphertext "east, west, south, north, top, bottom, left and right" into the ft encryption/decryption kanji ROM 7, decodes it into the p-kana sentence "Kyowa Haredesu", and outputs it to the FJ sentence conversion unit 11. When performing this decoding, the kanji "east" is encrypted and
Call up address d at the "east" position X-2, Y-2 of the Katakana/Kanji conversion table 6 programmed in the decoding Kanji ROM 7. Then, it is registered at the C address corresponding to the d address of X-2, Y-2 and decodes by calling the upper Katana kana "Ki". In the same way, I tried to decrypt it sequentially,
It is possible to decode the cipher text "East, West, South, North, Up, Down, Left and Right" into the Katakana sentence "Kiyouwaharedesu". Then,
Ordinary large conversion part 11 is this Katakana sentence "Kiyouwaharedesu"
In the above example, the received ordinary traffic 12 can be converted into "Today is sunny and ding".In addition, in the above example, "Now Bl is sunny and ding".
Although the encryption/decryption has been described, the present invention is not limited to this, and it goes without saying that any text can be encrypted/decrypted.

〔Effect of the invention〕

As described above in detail, the cryptographic transmitter/receiver according to the present invention can be used to convert Jintongjiao into meaningless Chinese characters or vice versa = 9, and to maintain the confidentiality of information transmitted to the receiving side. It has the effect of being able to do the following.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the cryptographic transmitter/receiver according to the present invention, and FIG.
It is a figure which shows the conversion table of M. 1... Sending ordinary communication, 2... Katakana conversion part, 3...
・φ・Katakana text, 4・・φ・Transmitter, 5・・Ciphertext, 6・・Conversion table, γ・・Encryption/decryption kanji ROM, 8・・・・Communication line, 9...receiver,
10...Kana sentence, 11...Ordinary large conversion section, 1
2...Reception normal traffic.

Claims (1)

[Claims] A cryptographic transceiver characterized in that the transmitter and receiver of a communication device are equipped with an encryption/decryption kanji ROM consisting of a katakana/kanji conversion table.