JPH012439A - Cryptographic device control method - 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 a cryptographic device control method, and more particularly to a cryptographic device control method for controlling a cryptographic device from a packet switch in cryptographic communication performed via a packet switching network. .

[Conventional technology]

Packet switching systems are well known these days. This switching method is a type of store-and-forward method in which data sent from a terminal device is temporarily stored in the exchange and then transferred at high speed within the switching network and delivered to the terminal device of the communication partner. The data is divided into a certain length and treated as packet data in which a header containing information such as destination information, error control information, and transfer order number is added to the beginning of each divided block.

The basic configuration of a packet switching network includes a packet switching device having a switching function, a packet multiplexing device having a packet assembly/disassembly function for general terminals, and a traffic convergence function.

Packet switching equipment sets communication routes, assembles or disassembles data from non-packet terminals into packet data format, and manages and controls the system, and packet multiplexers handle data from multiple terminals. Concentration of multiplexing in packet format on the communication line between the packet switch and the packet switch, as well as assembly and disassembly of packets to accommodate non-packet terminals, are performed at a level lower than that of the packet switch.

In addition to being capable of multiplex communication, such packet-switched networks have various advantages such as improved line usage efficiency, communication between different types of terminals, and lower bit error rate n, and their use is expanding. Increasingly, encrypted communications designed to keep the contents of communications confidential are also being conducted via these packet switching networks.

In encrypted communications carried out via a packet switching network, an encrypting device is usually under the control of a packet switching device, and its operations are often determined by instructions from the packet switching device. This directive includes changes to regulations (encryption and decryption Q) and repeat testing.

There are bypass (unencrypted communication) settings, etc.

Conventionally, in most methods of controlling an encryption device from a packet switch, a line for controlling the encryption device is provided separately from a line for transmitting and receiving packet data, and control information is transmitted from the packet switch to the encryption device through this line.

FIG. 2 is a block diagram showing the basic configuration of a conventional cryptographic device control system.

The conventional cryptographic device control system shown in FIG. 2 is comprised of a packet switch 1 and a cryptographic device 2.

The packet switch 1 transmits an encryption command signal to the encryption device 2 via the control line 102 while inputting data from a terminal device, etc., and the encryption device 2 operates in accordance with this signal. On the other hand, data to be transmitted onto the communication line is transmitted from the packet switch 1 to the encryption device 2 through the data line 101, and the encryption device 2 encrypts the data and sends it to the modem line for transmission onto the communication line.

[Problem that the invention seeks to solve]

As mentioned above, in the conventional cryptographic device control system, a control line for the cryptographic device is required separately from a data line, and the cryptographic device is interposed in a general communication line that uses a packet switching network and used for cryptographic communication. When attempting to do so, there is a drawback that not only new hardware is required in the packet switch, but also communication software for the control line is required.

SUMMARY OF THE INVENTION An object of the present invention is to provide a cryptographic device control method that eliminates the above-mentioned drawbacks, allows transmission of encrypted packet data using a general communication line, and greatly simplifies the system.

[Means for solving problems]

The method of the present invention is a cryptographic device control method for controlling a cryptographic device from a packet switch in cryptographic communication that encrypts and transmits/receives packet data via a packet switching network. - Constructed with a volume device control means that assembles control information from the exchange to the encryption device into packet data and sends it to the transmission path.

〔Example〕

Next, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the cryptographic device control method of the present invention.

The configuration of the embodiment shown in FIG. It consists of a data line 101.

When the packet exchanger needs to issue a command to the cryptographic device 2, it assembles the command into a packet with a command address and transmits it to the cryptographic device 2 through the data line 101 in the same way as normal packet data.

The encryption device 2 monitors the address of the packet data received from the packet switch 3, encrypts normal packets, and transmits them to the modem line.

When it receives a packet with a command address, it interprets the data part as a command to itself and operates accordingly.

〔Effect of the invention〕

As explained above, according to the present invention, in a cryptographic device control method for controlling a cryptographic device from a packet switch in cryptographic communication in which packet data to be transmitted and received via a packet switching network is encrypted and transmitted and received, By controlling the encryption device with an encryption device control means that assembles control information into packet data into packet data and sends it to the transmission path, it becomes possible to transmit encrypted packet data using a general communication line. This has the effect of realizing a cryptographic device control method that can simplify the system.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the cryptographic device control system of the present invention, and FIG. 2 is a block diagram showing the basic configuration of a conventional cryptographic device control system. 1... Packet switch, 2... Encryption device, 101.
... Data line, 102... Control line.

Claims (1)

[Claims] A cryptographic device control method for controlling a cryptographic device from a packet switch in cryptographic communication that encrypts and transmits and receives packet data via a packet switching network, in which control information from the packet switch to the cryptographic device is transmitted from the packet data A method for controlling a cryptographic device, characterized in that it is provided with a sound code device control means for assembling the code into a device and transmitting it to a transmission path.