JP2001222217A - Information transmission equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an information transmission equipment which is capable of securing uniform safety with respect to persons other than persons concerned with simple constitution without requiring a sofisticated encryption communication equipment in order to secure the safety of information communication and also whose cost is low. SOLUTION: This information transmission equipment is constituted so that original information are mixingly processed by a logically mixing and processing means while using the storage contents of an arbitrary information-degitized code storage means as a secret key to be ciphered and the ciphered information are converted into a transmission signal compatible to a transmission method by a transmission code converting means to be transmitted via a transmission line and the transmitted signal is deciphered by using the same information- digitized code storage medium at a receiving side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information transmission system for transmitting information to a communication partner using an information transmission line, preventing leakage of information contents in the middle of the information transmission line, and ensuring communication security. The present invention relates to a transmission device.

[0002]

2. Description of the Related Art Conventionally, as a means of information communication performed to a specific partner, information to be delivered is converted into a signal suitable for a transmission method and transmitted using a wired communication path or a wireless communication path. A method of receiving information by converting the signal into an original signal on a receiver side receiving the signal has been performed. In order to prevent a third party other than a legitimate recipient from intercepting the communication and illegally obtaining the contents of the communication on the information transmission path of the transmission signal in this communication method, the transmission signal encrypted by the sender should be transmitted. It becomes necessary to take measures for transmitting and decoding the data at the receiver side so that the contents of the communication are not known to a third party. In recent years, from the viewpoint of ensuring the security of information and communication, encryption technology has been making remarkable progress. With the spread of data communication, DES, RSA, FEA
Many encryption schemes, such as L, have been proposed that are difficult to decrypt by advanced mathematical processing.

[0003]

It is considered that the security of information and communication is maintained with a very high probability by applying the encryption method devised by such advanced mathematical processing. The use of software and a dedicated integrated circuit, etc., necessitate the use of dedicated communication systems for encryption and decryption. There is a problem that it is. In addition, various advanced encryption methods do not guarantee equal security to all eavesdroppers other than the parties involved, and especially for encryption method providers, take an extremely superior position in decryption methods. There is also a problem that the security of the information claimed by the encryption system provider cannot be taken into account. Furthermore, in addition to taking measures against eavesdropping on the information transmission path, leakage of information content due to unauthorized operation of the communication system itself is often relatively unprotected, and there is a concern about the security of hardware. SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problems, and its object is to reduce the cost of a communication system, to ensure equal security for a third party, and to prevent unauthorized use of hardware. An object of the present invention is to provide an information transmission device capable of taking safety measures for operation.

[0004]

SUMMARY OF THE INVENTION An information transmission apparatus according to the present invention comprises: an original information to be transmitted to a receiver; and a storage medium extraction apparatus which extracts a storage medium extracted by a storage medium code reading apparatus loaded with an arbitrary information coded storage medium. The code is converted to a mixed processing code processed using a logical mixing processing means, a synchronization signal according to a synchronization control means for controlling the storage medium code reading device, and the mixed processing code, The transmission signal is converted to a transmission signal suitable for the transmission method by the transmission code conversion means and transmitted to a desired receiver using the information transmission path, and the transmission signal received by the receiver is again converted to the mixed processing code by the transmission code conversion means. The synchronization signal is taken out, and the synchronization control means is operated by the synchronization signal to control the storage medium code reading device loaded with the information coded code storage medium storing the same information as the transmitting side. The storage medium extraction code synchronized with the mixed processing code described above is taken out, the storage medium extraction code is separated from the mixed processing code by using logical separation processing means, and the original information transmitted from the transmission side is obtained. It is configured to obtain. Further, the storage contents of the information digitizing code storage medium mounted on the storage medium code reading device are destroyed by the operation of the unauthorized operation detecting means provided in the information transmission apparatus of the present invention.

[0005]

According to the above arrangement, the original information transmitted from the sender to the receiver is mixed by the logical mixing means using the storage medium extraction code extracted from the information digitized storage medium as a secret key. As a result, an encryption code is formed, converted into a transmission signal by a transmission code conversion unit to which a synchronization signal is added by a synchronization control unit, and sent to a receiver via an information transmission path. On the receiver side, the received transmission signal is returned to the encrypted code and the synchronization signal again by the transmission code conversion means, and the storage medium code reading device loaded with the information digitized code storage medium storing the same information as the sender side is synchronized. The control means synchronously controls and extracts the storage medium extraction code,
Using this as a secret key, the mixed processing code is subjected to separation processing by a logical separation processing means to perform decoding. According to the present invention, since the user can arbitrarily create an information coded storage medium used as a secret key, equal security can be ensured for all third parties, and a communication system Is simplified, and the cost of measures for ensuring information security is reduced. Further, when an operation of reading out the storage contents of the information digitizing code storage medium loaded into the storage medium code reading device to the outside of the information transmission device by an unauthorized means is performed, or when the information loaded into the storage medium code reading device is performed. For example, when an illegal operation is performed to extract the information digitized code storage medium using unauthorized means, the unauthorized operation detection means provided in the information transmission device operates to operate the information loaded in the storage medium code reading apparatus. Since it acts so as to destroy the storage contents of the digitized code storage medium, the security of the communication system due to unauthorized use is also ensured.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram of an information transmission apparatus according to an embodiment of the present invention. In the figure, 1 is original information (plaintext information) of a digitized code, 2 is a storage medium code reader,
Reference numeral 3 denotes an information digitizing code storage medium loaded in the storage medium reading device 2, reference numeral 4 denotes a synchronization control means provided for controlling the storage medium code reading device 2 by a synchronization signal, and reference numeral 5 denotes original information 1.
And logical mixing processing means (encryption means) provided for receiving a signal of the storage medium extraction code (secret key) extracted from the storage medium code reading device 2 and performing mixing processing by a logic circuit or the like; A transmission code conversion means (modulation means) provided to receive the synchronization signal from the synchronization control means 4 and the signal of the mixed processing code from the logical mixing processing means 5 and convert it into a transmission signal suitable for the transmission method. An originating device is configured. Numeral 7 denotes an information transmission line for transmitting the transmission signal converted by the transmission code conversion means 6, and 8 corresponding to the receiving side device receives the transmission signal from the communication transmission line 7 and is the same as the originator side. The transmission code conversion means (demodulation means) 9 provided to take out the mixed processing code and the synchronization signal again, receives the mixed processing code and the synchronization signal from the transmission code conversion means 8 and operates the synchronization control means 4. The storage medium code reading device 2 loaded with the information coded code storage medium 3 storing the same information contents as the transmitting side receives the storage medium extraction code extracted by synchronous control and performs separation processing by a logic circuit or the like to perform the separation processing. Logical separation processing means (decoding means) provided for returning information. With the above configuration, the original information 1 is used in a form in which voice, image, information data, and the like are converted into numerical codes, and is a logical mixing processing unit in which a code chain circuit and the like are configured from logic circuit elements, shift registers, and the like 5 is input. On the other hand, from the storage medium code reading device 2 loaded with the information coded code storage medium 3 (minidisk or the like) in which the sender and the receiver have stored an arbitrary signal as a coded code in a storage medium independently created, the synchronization control means 4 is used as a secret key (pseudo-noise code) and input to the logical mixing processing means 5 to mix the two to obtain a mixed processing code. In this mixed processing code, since the digitized original information and the pseudo-noise code are mixed by code chain logical processing, it is extremely difficult to know the original information from the mixed processing code (encrypted code). Next, a public communication line, a wireless communication line, or a dedicated information transmission line is used as a means for delivering information to the receiver. A transmission method and a communication protocol suitable for the information transmission line are applied. The mixed processing code is modulated using the transmission code conversion means 6, added with a synchronization signal from the synchronization control means 4, converted into a transmission signal, and transmitted from the transmitter apparatus via the information transmission path 7. . This transmission signal is received by the receiver side device and demodulated by the transmission conversion means 8 to obtain a mixed processing code and a synchronization signal. This mixed processing code is input to the logical separation processing means 9 constructed in the same manner as the logical mixing processing means 5, and receives the synchronization signal to activate the synchronization control means and stores the same information as that of the sender. Synchronized control of the storage medium code reading device 2 loaded with the information digitized code storage medium 3 that has been loaded and inputs the storage medium extraction code (pseudo-noise code) to the logical separation processing means for separation processing (decoding) To receive the original information. Therefore, according to the present invention, advanced mathematical processing is not performed for encryption, and, for example, surrounding noise and musical sounds that are unrelated to the original information to be transmitted, unnecessary information data, and the like are appropriately processed and recorded, and the parties independently perform the processing. Since the storage contents of the created storage medium for information and numerical codes are used for pseudo-noise codes and used as a secret key, there is almost no periodic repetition of the codes. Unless the storage contents of the medium are known, it is possible to escape from a third party decryption attack. Although not shown, in order to protect against an attack on hardware, an illicit operation detecting means is provided inside the transmitting side device and the receiving side device so that the storage medium extraction code outside the information transmission apparatus is illegal. If a read operation or an illegal extraction operation of an information coded storage medium is performed, the illegal operation is detected and the stored contents are destroyed. We are also making every effort to combat unauthorized use.

[0007]

As described above, according to the present invention, the contents stored in an arbitrary information coded code storage medium are used as a secret key, and the information is mixed with the original information by a logical mixing processing means to perform encryption. The transmission code conversion means converts the transmission signal into a transmission signal suitable for the transmission method, transmits the signal via the information transmission path, and decodes the data using the information coded code storage medium storing the same information as the transmission side on the reception side. It is not necessary to use advanced encryption technology, and it is not only possible to secure the security of information communication at low cost because it is a simple communication system, but also to all third parties other than the parties. On the other hand, there is an effect that equal security can be secured.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an information transmission apparatus according to an embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 original information 2 storage medium code reading device 3 information digitized code storage medium 4 synchronization control means 5 logical mixing processing means 6 transmission code conversion means 7 communication transmission line 8 transmission code conversion means 9 logical separation processing means

Claims (2)

[Claims] 1. A mixture obtained by processing original information to be delivered to a receiver and a storage medium extraction code extracted by a storage medium code reading device loaded with an arbitrary information digitization code storage medium using logical mixing processing means. A desired receiver is converted to a transmission signal by a transmission code conversion means, which converts a processing code and a synchronization signal according to a synchronization control means provided for controlling the storage medium code reading apparatus, to a desired receiver. While transmitting to the receiver, the transmission signal received at the receiver side was subjected to a mixed processing code and a synchronization signal by the transmission code conversion means, and the synchronization signal was stored by the synchronization control means with the same information content as the sender side. By controlling the storage medium code reading device loaded with the information digitizing code storage medium, the storage medium extraction code synchronized with the mixed processing code is taken out, and the mixed processing code and the storage medium extraction code are extracted. An information transmission apparatus configured to perform a separation process on an output code using a logical separation processing unit to obtain original information transmitted from a sender. 2. The information transmission device according to claim 1, wherein the operation of the unauthorized operation detecting means provided in the information transmission device destroys the storage contents stored in the information digitized code storage medium loaded in the storage medium code reading device. The information transmission device according to claim 1.