CN105262583A

CN105262583A - Quantum data terminal networking system and multi-party session implementation method based on PSTN (Public Switched Telephone Network) public network

Info

Publication number: CN105262583A
Application number: CN201510563254.9A
Authority: CN
Inventors: 刘梦婕; 戴金; 尹凯; 黄敦锋; 刘云; 苗春华
Original assignee: Anhui Asky Quantum Technology Co Ltd
Current assignee: Anhui Asky Quantum Technology Co Ltd
Priority date: 2015-09-07
Filing date: 2015-09-07
Publication date: 2016-01-20

Abstract

The invention discloses a quantum data terminal networking system based on a PSTN (Public Switched Telephone Network) public network. Central data routing equipment comprises Modem modules, an FPGA (Field Programmable Gate Array) module, high-capacity key storage equipment, and a CPU (Central Processing Unit) for managing the high-capacity storage equipment, wherein the FPGA module is connected with the CPU; the FPGA module is connected with the Modem modules; the Modem modules are used for being connected with telephone ports at a back end of a switch; and external line interfaces at a front end of the switch are used for being connected with quantum data terminals. During a call, quantum data privacy terminals establish connections with corresponding Modem modules of the central data routing equipment firstly through the Modem modules, and the central data routing equipment is used for performing decryption with corresponding keys and encrypting plain texts with a key of an object to be called, so that all data on the PSTN public network is encrypted cipher texts. Through adoption of the system, all quantum data privacy terminal holders in the network can make calls to one another and hold a multi-party voice conference with a small storage space and a low calculation capability.

Description

Based on the quantal data terminal group network system of PSTN public network and the implementation method of multi-party conversation

Technical field

The present invention relates to a kind of based on the quantal data terminal group network system of PSTN public network and the implementation method of multi-party conversation.

Background technology

Code phone development based on PSTN public network has several years, and present implementation method is nothing more than analog encryption and digital encryption two kinds of methods.Analog encryption easily cracks because of it, and Line Attenuation problem steps down from the stage of history gradually, and digital encryption becomes scrambler phone main force.

Digital encryption mainly relies on Modem.Telephone wire analog signals is modulated to digital signal, then digital signal is encrypted, then be modulated into analog signal by Modem and mail to telephone wire.Digital encryption method many uses algorithm for encryption, as adopted 128 block encryption algorithms of 1024 RSA public key systems, M1 algorithm etc., but the loss all facing a code phone can affect the use of all code phones of same algorithm.The cipher mode of this patent " one-time pad " well solves this problem, and the loss of a machine does not affect the use of other machines.But the defect of " one-time pad " cipher mode stamps existing problems mutually many people.Along with the growth of customer group, the key storage space of needs is that factorial increases, and this is concerning fatal beyond doubt the distribution of key and small portable device.The encryption of " one-time pad " true random number is the account form adopting true random number and plaintext XOR, encryption itself does not rely on algorithm, only relevant with true random number, solve common algorithm encryption once wherein an equipment is cracked, all disabled shortcoming of all the other all devices.But due to the reason of " one-time pad " and " being finished key to pulverize ", require larger to memory space.Iff two personal communications, two people everyone have 1G key (approximately can converse 50 hours), just need to deposit 2G key in quantal data terminal; If three can communicate per capita, just need storage 3 unequal to 6G key; If there is thousands of people people even up to ten thousand to communicate simultaneously, " one-time pad " only can rest on the possible in theory stage, does not have the value of actual use.

Summary of the invention

The object of the invention is for above-mentioned the deficiencies in the prior art, there is provided a kind of based on the quantal data terminal group network system of PSTN public network and the implementation method of multi-party conversation, based on the quantal data terminal group network system of PSTN public network and the implementation method of multi-party conversation, this is intended to that " one-time pad " true random number basis realizes many people and intercoms mutually and do not increase just device memory.

For realizing above-mentioned technical purpose, the technical scheme that the present invention takes is: based on the quantal data terminal group network system of PSTN public network, comprises centre data routing device centre data routing device and the general switch with at least two outer line interfaces; Its feature comprises the CPU managed for the Modem module of modulating and demodulating signal, the FPGA module being responsible for Data Analysis and route, Large Copacity cipher key storage device and responsible mass-memory unit in: described centre data routing device; FPGA module is connected with CPU, and FPGA module is connected with Modem module, and Modem module is for connecting switch rear end phone port; The outer line interface of switch front end is for connecting quantal data terminal.

During call, the secret terminal of quantal data is first connected to the corresponding Modem module of centre data routing device centre data routing device by Modem module, centre data routing device is responsible for being decrypted by corresponding secret key, again plaintext is encrypted for the key of conversation object, with make all PSTN public networks are all encrypt after information.One-time pad needs a large amount of true random number, and Large Copacity cipher key storage device stores these true random number keys.

Further, FPGA module is also connected with Modem module by RS232 interface.

Further, FPGA module and CPU carry out data communication by local bus localbus.

For realizing above-mentioned technical purpose, the another kind of technical scheme that the present invention takes is: based on the implementation method of the quantal data terminal multi-party conversation of PSTN public network, adopts the above-mentioned quantal data terminal group network system based on PSTN public network, comprises the following steps:

Before secret telephony, first consult the air time, dial back centre data routing device simultaneously;

The secret terminal of quantal data is first connected by Modem module Modem module corresponding to centre data routing device;

Centre data routing device is responsible for being decrypted by corresponding secret key, then is encrypted for the key of conversation object by plaintext, to make on PSTN public network total data for the ciphertext after encryption.

Equipment is needed to have when the present invention works: 1) the secret terminal of quantal data is some; 2) there is the general switch one of multiple outer line interface; 3) centre data routing device equipment is a set of.Need line condition: unit or the group with analog trunk, this is a business of telecommunications, such as dial 10000 these numbers and in fact can be transferred to a lot of operator, we need to use object to open this business exactly---and a number may correspond to multiple phone line.Arbitrarily quantum data terminal only needs the key of storage own.Before secret telephony, first consult the air time, dial back centre data routing device simultaneously.That the secret terminal of throughput subdata is first by Modem module in actual communication process) first Modem module module corresponding to centre data routing device connect, centre data routing device is responsible for being decrypted by corresponding secret key, again the key of plaintext for conversation object is encrypted, ensure that on PSTN public network, total data is the ciphertext after encryption, is issued to the object of all quantal data terminal communications of consolidated network in safe and secret prerequisite.Many people can be allowed to carry out videoconference online simultaneously.The information such as other outward dialings complete by quantal data terminal, more convenient user operation.FPGA is responsible for Data Analysis and route, and CPU is responsible for mass-memory unit management, FPGA and CPU carries out data communication by localbus, and concrete communication data amount view network size adjusts to some extent.

The present invention is directed to the networking plan of " one-time pad " cryptographic algorithm, the process of back-end central data routing device is transferred in storage, route, calculating, reaches all quantal data terminal holders in net and can converse mutually to consume less memory space and computing capability and many people can carry out voice conferencing.

Figure of description

Fig. 1 is structural representation of the present invention.

Fig. 2 is user level operating procedure schematic flow sheet.

The structural representation of data routing device centered by Fig. 3.

Embodiment

Embodiment 1

See Fig. 1, Fig. 2 and Fig. 3, this is based on the quantal data terminal group network system of PSTN public network, comprises centre data routing device and the general switch with at least two outer line interfaces; Described centre data routing device comprises the CPU managed for the Modem module of modulating and demodulating signal, the FPGA module being responsible for Data Analysis and route, Large Copacity cipher key storage device and responsible mass-memory unit; FPGA module is connected with CPU, and FPGA module is connected with Modem module, and Modem module is for connecting switch rear end phone port; The outer line interface of switch front end is for connecting quantal data terminal.During call, the secret terminal of quantal data is first connected by Modem module Modem module corresponding to centre data routing device, centre data routing device is responsible for being decrypted by corresponding secret key, again plaintext is encrypted for the key of conversation object, to make on PSTN public network total data for the ciphertext after encryption.FPGA module is also connected with Modem module by RS232 interface.FPGA module and CPU carry out data communication by local bus localbus.

The present invention does not affect the dialing custom of end user, does not increase operation easier, does not relate to the crosspoint of switch, achieve the interconnection of whole network with minimum equipment.

Embodiment 2

This adopts the quantal data terminal group network system based on PSTN public network in embodiment 1 based on the implementation method of the quantal data terminal multi-party conversation of PSTN public network, comprises the following steps:

Before secret telephony, first link up the air time, dial back centre data routing device simultaneously;

Centre data routing device is responsible for being decrypted by corresponding secret key, then is encrypted for the key of conversation object by plaintext, with make all PSTN public networks are all encrypt after information.

Claims

1., based on a quantal data terminal group network system for PSTN public network, comprise centre data routing device centre data routing device and the general switch with at least two outer line interfaces; Its feature comprises the CPU managed for the Modem module of modulating and demodulating signal, the FPGA module being responsible for Data Analysis and route, Large Copacity cipher key storage device and responsible mass-memory unit in: described centre data routing device; FPGA module is connected with CPU, and FPGA module is connected with Modem module, and Modem module is for connecting switch rear end phone port; The outer line interface of switch front end is for connecting quantal data terminal.

During call, the secret terminal of quantal data is first connected by Modem module Modem module corresponding to centre data routing device, centre data routing device is responsible for being decrypted with the key corresponding to the secret terminal of this quantal data, be encrypted deciphering the plaintext that obtains with key mate for conversation object again, to make total data on PSTN public network for the ciphertext after encrypting.

2. the quantal data terminal group network system based on PSTN public network according to claim 1, is characterized in that: FPGA module is also connected with Modem module by RS232 interface.

3. the quantal data terminal group network system based on PSTN public network according to claim 1, is characterized in that: FPGA module and CPU carry out data communication by local bus localbus.

4. adopt the implementation method of the quantal data terminal multi-party conversation based on PSTN public network of the quantal data terminal group network system based on PSTN public network according to any one of claim 1-3, comprise the following steps: