CN101145228A - Production management system and safety implementation method - Google Patents
Production management system and safety implementation method Download PDFInfo
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- CN101145228A CN101145228A CNA2007101758420A CN200710175842A CN101145228A CN 101145228 A CN101145228 A CN 101145228A CN A2007101758420 A CNA2007101758420 A CN A2007101758420A CN 200710175842 A CN200710175842 A CN 200710175842A CN 101145228 A CN101145228 A CN 101145228A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
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Abstract
The invention provides a production management system, which comprises a client embedded hardware support platform and a data server used for receiving and publishing production management information. Both the client embedded hardware support platform and the data server are assessed to a local area network (LAN). The client embedded hardware support platform comprises an embedded chip and peripherals, wherein the embedded chip comprises a bus system, an application program interface and a high-speed programmable processor. The embedded hardware support platform contains an operation system and application programs. The peripherals include an external memory and/or a network bridging chip. The embedded chip also comprises a disposable programmable memory and an information safety processing module, and the disposable programmable memory and the information safety processing module are both accessed to the bus system. The disposable programmable memory is used for storing programs and root keys; the information safety processing module is used for encrypting and/or decrypting data and/or programs. The invention solves the safety problem of the embedded chip itself and also the network.
Description
Technical field
The present invention relates to a kind of information management system, particularly a kind of production management system and safe implementation method thereof.
Background technology
Management information system MIS (Management Information System) is meant the integrated man-machine infosystem that information is collected, transmits, stores, utilized and safeguards, utilize database and management system thereof, the processing of data and economic management pattern are combined, utilize past data to realize functions such as prediction, control, management and decision-making, for the operation of a tissue, decision-making function is closed in management that the information support is provided, and realizes comprehensive scientific management.
In MIS application and development process, host mode, file server pattern, Client three kinds of platform models have successively appearred, i.e..
Client (C/S model) is as the main MIS form of expression; need satisfy three class Internets in client; it is the network application form of internet (internet), Intranet (intranet) and extranet (extranet); need to set up the safety that connects safely with protected data information and transmit, need set up operating system platform to satisfy the customized software demands of applications.Present client computer is realized by the PC form, inevitably bring system cost increase, owing to operating system platform, hardware disunity and difficult management, need additional software or outside optional equipment to guarantee problems such as security, rights of using control difficulty, system bottom (hardware environment, operating system environment) be non-public, comprise: equipment (hardware, software) operating right control control relies on the PC platform, use original Password Management, defectiveness is gone up in security, convenience, user right control, the control of application software rights of using; The local security of PC platform is not strong, and data storage such as hard disk are not had effective controling mechanism; The network connection safety relies on software, and security is not high; The network type of attachment relies on peripheral optional equipment, has increased the complexity and the cost of system; Client is made of PC, and network design cost height is unfavorable for that the large-scale promotion in the enterprise is used; Client can't be accomplished miniaturization, is unfavorable for using in management by walking around; Plateform system is non-open type system such as Windows, unfavorable and software Development and bottom Application Expansion; There is the system compatibility problem in the system platform variation in concrete the use.
Summary of the invention
The present invention proposes a kind of method that makes up private client with special IC, can effectively solve problems such as network attended operation security, the control of user's rights of using, low cost, open development environment, set up the embedded hardware support platform of production management.
The invention provides a kind of production management system, comprise client embedded hardware support platform, be used to receive and issue the data server of production management information, the equal access to LAN of client embedded hardware support platform and data server, client embedded hardware support platform comprises embedded chip and peripherals, embedded chip comprises bus system, application programming interfaces, the high-speed programmable processor, the embedded hardware support platform comprises operating system and application program, peripherals comprises external memory storage and/or network bridging chip, and embedded chip also comprises disposable programmable memory and information security processing module; Disposable programmable memory and information security processing module all insert bus system; Disposable programmable memory is used to store boot and root key; The information security processing module is used for encryption and/or data decryption and/or program.
Described bus system comprises high speed data bus, low speed configuration register bus, bus arbiter, direct memory access transport controller; Bus arbiter is used for controlling each module taking high speed data bus of inserting bus system in the right of priority mode; High speed data bus is used to provide high-speed data channel; The high-speed programmable processor is used for being configured by the control register of low speed configuration register bus to each module of access bus system.
Embedded chip also comprises the high-speed bus expansion interface that is connected with the network bridging chip, and this high-speed bus expansion interface inserts bus system.
Embedded chip also comprises control of authority module and high-speed bus expansion interface, and control of authority module and high-speed bus expansion interface insert bus system, is used for realizing by fingerprint recognition user's rights management.
The control of authority module comprises fingerprint identification module.
The information security processing module comprises randomizer, asymmetric encryption module, Hash module and symmetric cryptography module.
Randomizer, asymmetric encryption module and Hash module are used to realize network authentication; The symmetric cryptography module is used to realize the encryption of local data encryption storage and network data transmission.
Also comprise ca authentication center and remote control terminal, described LAN (Local Area Network), ca authentication center, remote control terminal insert the internet, are used to realize network security.
Also comprise real-time audio and video collaborative process module, this real-time audio and video collaborative process module connecting system bus is used to handle real-time audio stream and/or video flowing.
The invention provides in a kind of production management system safe implementation method on the sheet, comprising:
Step 101, client embedded hardware support platform is written into root key by the boot in the programmable storage;
Step 102, client embedded hardware support platform is written into expanded keys encrypted in the external memory storage, the expanded keys of information security processing module decrypt encrypted;
Step 103, data and/or program in the expanded keys deciphering external memory storage after the information security processing module utilization deciphering;
Step 104 starts the operating system and program.
Also comprise before the step 101: carry out password or fingerprint authentication.
The invention provides network security implementation method in a kind of production management system, comprising: the data to client embedded hardware support platform transmission in LAN (Local Area Network) or the internet are carried out symmetric cryptography and/or asymmetric encryption.
In the internet, realize transmit leg and/or take over party's authentication by third party certification authority.
The invention provides real-time audio and video sending method in a kind of production management system, comprising:
Step 141, the real-time audio and video collaborative process module of transmit leg is carried out compressed encoding to data stream;
Step 142, the information security processing module of transmit leg is carried out symmetric cryptography to data stream;
Step 143, transmit leg carries out Network Transmission with data encrypted stream.
In the step 133, transmit leg carries out Network Transmission with data encrypted stream by the high-speed bus expansion interface.
The invention provides real-time audio and video method of reseptance in a kind of production management system, comprising:
Step 134, the take over party receives data encrypted stream;
Step 135, take over party's information security is handled the data stream of mould decrypt encrypted;
Step 136, take over party's real-time audio and video collaborative process module decompresses to the data stream after deciphering.
In the step 134, the take over party receives data encrypted stream by the high-speed bus expansion interface.
Technique effect of the present invention is: by memory characteristics and control technology, the embedded chip of biological identification technique construction self-organizing system solves embedded chip self-security (platform security) problem; Utilize asymmetric, symmetric encipherment algorithm to set up network data (enterprises Ethernet, internet Internet) secure transport mechanism for the basis; Utilize biological identification technology control operation personnel authority, identifying user identity; Make up this locality, network chip platform safety, subscriber authentication, information security storage, exchanging safety mechanism; Voice being provided, showing control and interface, is the basis of realizing real-time information collection, transmitting, setting up good information interchange user environment; The self-organizing system implementation need not that computer platform supports to reducing (being determined by concrete applied environment), thereby the complexity of simplified system can significantly reduce system cost for the application at many reference mark; Local (non-network connection) is incorporated in the one chip with the function based on control of authority of network (network is connected) equipment, and the range of application of extended chip is for magnanimity equipment (system) network insertion provides unified technology platform and management platform; Specialized equipment (chip) has higher arithmetic capability, has improved the performance of system, for mass data safety (encryption) transmission provides possibility; Target is determined plan target is decomposed, process control, time management, control of authority, management methods such as role assignments will build in the operating system based on programmable processor on the sheet, can use the system of this chip to set up complete administrative mechanism.Comprehensive above-mentioned some, the invention provides a kind of good user profile (voice, video, data message) interactive function that has, authentic communication, user right security control are to realize that the production scene management is the low-cost hardware support platform of target.
Description of drawings
Fig. 1 is an embedded hardware support platform structural drawing provided by the invention;
Fig. 2 is a user right security control flow process provided by the invention;
Fig. 3 is a user fingerprints identification realization flow provided by the invention;
Fig. 4 is a network security realization flow provided by the invention;
Fig. 5 is a real-time audio and video realization flow provided by the invention;
Fig. 6 is the production management system with client embedded hardware support platform.
Embodiment
The invention provides a kind of memory-safe control technology, encryption and decryption technology, biological identification technique construction security platform of utilizing, realize message exchange and device control with peripheral interface, programmable processor is the fundamental construction Chip Operating System, by hardware (chip-scale) the support platform implementation of upper application software implementation procedure management function.In local (non-network connection) or network (network connection), realize a plan enforcement with monitoring, information gathering and exchange, management functions such as personnel and Resource allocation and smoothing.
The technology of the present invention can realize that function comprises and be not limited to following description: comprise but do not limit and support the procotol of TCP/IP, CAN, NetBEUI.Perfect local security mechanism is arranged, comprise local application and data security.Network security mechanism is arranged.Can authenticate and carry out this locality, network management user's rights of using.Real-time audio, video transmission can be realized, the communication of network (VOIP), point-to-point, multi-user, broadcasting can be realized.The open operation system platform can be provided.Can set up a series of management application software, realize information gathering, record, editor, issue.Can realize the monitoring of personnel, equipment by application software and low-level hardware.
Embedded hardware support platform structural representation of the present invention comprises embedded chip 100 and corresponding peripheral device as shown in Figure 1.Embedded chip 100 comprises:
1. bus structure
Set up bus system at a high speed by two-stage crossover bus (Crossing Bus), by high speed data bus 101, low speed configuration register bus 102, bus arbiter 103, direct memory visit (DMA) transmission control unit (TCU) 104 is formed, high speed data bus 101 provides high-speed data channel, bus arbiter 103 is controlled the take situation of disparate modules to high speed data bus 101 in the right of priority mode, dma controller 104 be one independently, but the bus data transmission control module of simple programming, after programming, be independent of 105 operations of high-speed programmable processor, the read-write of high speed operation data stream, alleviate the workload of high-speed programmable processor 105, improve the overall performance of system.
2. the high-speed programmable processor 105
High-speed programmable processor 105 is configured by the control register of each module on 102 pairs of support platforms of low speed configuration register bus, thereby realizes the co-ordination of each intermodule, and the hardware platform of operation is provided for the operating system application software.
3. otp memory 106 on the sheet
OTP (one timing programme) is a disposable programmable memory, is used to store the root key of boot, expanded keys, sets up local security policy.Otp memory 106 is to realize the security classes Application Building Block.
4. the high-speed bus expansion interface 107
The function expansion interface of chip is provided.Can externally be not limited to ethernet controller bridging chip (wired), bluetooth, Zigee network bridging chips such as (wireless) are to realize network application.Can externally be not limited to the computer interface bridging chip of USB/SATA/PATA/PCI/PCIE etc., to realize computer application.
5. control of authority module 108
The core of control of authority module 108 is based on the fingerprint identification technology of biological identification technology, improves user's rights management by fingerprint identification technology, the security that has improved chip system, the convenience of using with final products.
6. the information security processing module 109
Information security processing module 109 is made up of randomizer 110, asymmetric encryption module 111, Hash module 112, symmetric cryptography module 113.Wherein machine number generator 110, asymmetric encryption module 111, Hash module 112 be for realizing the functional module of network authentication, can realize that by it PKI etc. is based on network authentication system public, private key.Wherein asymmetric encryption module 111 is not restricted to RSA, ECC asymmetric encryption mode, and Hash module 112 is not restricted to the hash mode of MD5, SH1, SH2, and randomizer 110 is not restricted to phase place and produces method at random.Symmetric cryptography module 113 is used for the encryption that local data is encrypted storage and network data transmission.Its mode is not restricted to DES, 3DES, AES.
7. the real-time audio and video processing module 114
Real-time audio and video Co-processor Module 114 is made up of real-time audio Co-processor Module 115 and real-time video Co-processor Module 116.Real-time audio processing module 115 and real-time video processing module 116 provide in the audio ﹠ video encoding and decoding the have relatively high expectations processing of part of implementation, can effectively reduce the taking of high-speed programmable processor 105 computational resources, the overall performance of system is provided.Real-time audio and video processing module 114 also provides the interface (as display, phone) of demonstration and voice device, equipment simultaneously.
8. operating system, application program, data external memory interface 117
Because real time operating system, application program can take a large amount of storage spaces, also need for using reserved data, program, system memory space future simultaneously, thereby set up operating system, application program, data external memory interface 117, can realize mobile storage, the system of data, the upgrading and the expansion of program easily.
9. the programmable peripheral device control module 118
Programmable peripheral device control module 118 provides the control and the data transmission of peripherals such as keyboard, printer, fingerprint sensor, industrial machinery.
10. system software
The application program of system is that hardware platform basis, real time operating system are software platform with high-speed programmable processor 105, coordinates the real-time running of each hardware, and realizes human-computer interaction function such as graphic interface.
System application includes but not limited to audiovisual applications software, monitoring of tools software, instant messages (literal) issue, production Real-Time Scheduling software, quality control software etc.
The invention will be further described below by the groundwork process flow diagram:
One. the safe realization flow (Fig. 2) of hardware support platform
Realize the hardware support platform security system of chip by flow process as shown in Figure 2, according to this flow process can realize easily local device, data, program single the multi-user authority security control.Process description is as follows:
Step 201, chip power reset:
Chip from power on/start when resetting.
Step 202 is written into the chip boot
Power on reset the back chip will be automatically from the sheet otp memory be written into the chip boot, whether its chips boot statement need be through entering next step operation again behind password or the fingerprint authentication, password here and fingerprint are used to control the rights of using of this chip.
Whether step 203 satisfies the chip enable requirement
As need not checking or password and fingerprint authentication pass through, chip will be written into root key from otp memory on the sheet.Root key is the encryption key of the expanded keys on the external memory storage.
Step 204 is written into expanded keys encrypted in the external memory storage and deciphering
Symmetric cryptography module 113 in utilization root key and the information security processing module 109 realizes expanded keys is deciphered.
Step 205 is according to the deciphering of the expanded keys after deciphering external memory storage data, program
The deciphering that expanded keys deciphering after the utilization deciphering and the symmetric cryptography module 113 in the information security processing module 109 realize outside memory data, program.
Step 206 starts the operating system, application program, response projects user operation
Enter user's operation link, realize the realization of every customization function of user
Whether step 207 reaches the standby requirement
When chip was not operated in the specific time, under the situation of customer requirements, chip enters holding state
Step 208 enters low-power consumption mode
Can significantly reduce chip power-consumption at this state, be used for satisfying the environment for use that power supply is had requirement in mobile office etc.
Two. user fingerprints identification realization flow (Fig. 3)
In a kind of mode (cipher control be another kind of mode) of fingerprint recognition as control of authority, fingerprint recognition all can be used in the different application of chip system, and its realization process flow diagram is seen Fig. 3, and process description is as follows:
Step 301, fingerprint image acquisition
Because the interface shape and the disunity of fingerprint image acquisition Yi chip, be divided into parallel (class computer's RGB video interface) and serial (as SPI) interface substantially, on the specific implementation each Acquisition Instrument chip concrete difference is arranged again, thereby use among the present invention by high-speed bus expansion interface 107 realize Acquisition Instrument the interface of chip, carry out the collection of information in fingerprint.
Step 302, fingerprint image is handled
Since the collection fingerprint image mass discrepancy of Tu Xiangcaijiyi chip, thereby need do processing such as figure image intensifying, image denoising, image histogram correction to images acquired, so that picture quality difference reduces follow-up processing influence.
Step 303, fingerprint template extracts
The image conversion finger print information is converted into the process of digitizing finger print information, thus when reducing the storage fingerprint to the requirement of storage space.
Step 304, the fingerprint template registration
Fingerprint template registration is to store into the fingerprint digital information on the sheet or the process of chip external memory, when using during for start-up course, this fingerprint template then is stored on the sheet in the otp memory, as not being, then can be stored in the chip external memory, according to security requirement, can use expanded keys that Template Information is encrypted during storage.
Step 305, the fingerprint template comparison
The comparison of fingerprint template is the verification process of fingerprint, by to gathering the comparison of the fingerprint template in fingerprint and the memory device, determines user's authority (authentication authorization and accounting result's output).
Three. network security realization flow (Fig. 4)
In LAN (Local Area Network),, realize the data security transmission based on symmetric cryptography (symmetric cryptography module 113) and finger print identifying (control of authority module 108) of device A and equipment B by ICP/IP protocol.
In the Internet, by the tripartite CA of certification authority, realize folk prescription or the both sides' authentication of device A and equipment C, when data transmission, use the symmetric cryptography (symmetric cryptography module 113) and the hybrid mode of asymmetric encryption (asymmetric encryption module 111) to carry out the data encryption transmission.
Device A, B, C all can be the hardware support platform of setting forth among the present invention.
Four. the real-time audio and video realization flow
Audio frequency and video transmission/reception when real-time audio and video is realized is one group of reciprocal process, and process of transmitting is that example describes, as shown in Figure 5.
Step 51, transmit leg obtains video, voice raw data by video interface/audio interface.
Step 52, transmit leg carries out compressed encoding by 115 pairs of data streams of real-time video Co-processor Module 116/ real-time audio Co-processor Module.
Step 53,113 pairs of data stream encryptions of the symmetric cryptography module in the information security processing module 109 of transmit leg.
Step 54, transmit leg is realized the network transmission protocol (TCP/IP) by high-speed programmable processor 105.
Step 55, transmit leg are set up network physical by high speed bus interface and are connected.
The process that audio frequency and video receive comprises:
Step 56, the take over party is by high speed bus interface, and the network transmission protocol of utilizing high-speed programmable processor 105 to realize receives data encrypted stream;
Step 57,113 pairs of data stream encryptions of the symmetric cryptography module in take over party's the information security processing module 109;
Step 58, the take over party decompresses by 115 pairs of data streams of real-time video Co-processor Module 116/ real-time audio Co-processor Module;
Step 59, the take over party obtains video, speech data by video interface/audio interface.
Fig. 6 is the punctual production system of discrete type machinery manufacturing industry enterprise.This discrete type machinery manufacturing industry enterprise is owing to mainly be engaged in single-piece, small serial production, and the technological process of product often changes, and therefore, need carry out good plan.Owing to be to produce mainly by the order tissue, when be difficult to the prediction order arrives, therefore, the buying and the plan of workshop are just needed the good production planning system, need information management system to participate in the formulation of the production schedule and the adjustment of the real-time condition of production especially.
This basic demand of discrete type machinery manufacturing industry enterprise has following three aspects:
1. timely and appropriate discovery production, promptly in needs, amount is on demand produced required product.
2. elasticity disposes the operation number.
3. quality assurance promptly in case note abnormalities or the bad product mechanism moved of arrestment automatically, when the operation of equipment workman of forefront of the production finds the problem of product or equipment, has the right to stop voluntarily the administrative mechanism of producing.
According to above demand, use the present invention to make up production management system shown in Figure 6, comprise that client embedded hardware support platform is (as the A worktable, the B worktable, the C worktable), network (comprising LAN (Local Area Network) and internet), switch, database, and remote control terminal (as the terminal of Long-distance Control A, B and C worktable) also comprise the ca authentication center with Internet connection.
For this discrete type machinery manufacturing industry enterprise, workflow is as follows:
1) Long-distance Control A, B, C department propose the production demand.
2) Long-distance Control A, B, C department set up authentication, signature by ca authentication center, internet and production division's data server, and demand information is published to production division's data server.
3) production division's data server is set up the production schedule according to the demand information, current production line situation, the arrangement of raw materials inventory situation that receive.
4) production division's data server with the production schedule, corresponding technological production norm, starting material demand, be published to the client that the present invention makes up.
5) storehouse is sent to the corresponding worktable of production line according to the starting material demand information with starting material.
6) worktable is adjusted device parameter according to technological production norm, begins to produce after starting material are sent to.
7) worktable is monitored the system production equipment in real time according to technological production norm aborning, go wrong as equipment generation problem or product quality, A. in production division's data server reference data stop all apparatus for production line runnings or stop current production equipment running or report situation according to operating personnel's authority as the standard of processing .B.
8) production division's data server is dynamically adjusted the model of current production product according to work at present personnel situation, equipment operation situation, product quality, production starting material.
Those skilled in the art can also carry out various modifications to above content under the condition that does not break away from the definite the spirit and scope of the present invention of claims.Therefore scope of the present invention is not limited in above explanation, but determine by the scope of claims.
Claims (17)
1. production management system, comprise client embedded hardware support platform, be used to receive and issue the data server of production management information, the equal access to LAN of client embedded hardware support platform and data server, client embedded hardware support platform comprises embedded chip and peripherals, embedded chip comprises bus system, application programming interfaces, the high-speed programmable processor, the embedded hardware support platform comprises operating system and application program, peripherals comprises external memory storage and/or network bridging chip, it is characterized in that embedded chip also comprises disposable programmable memory and information security processing module; Disposable programmable memory and information security processing module all insert bus system; Disposable programmable memory is used to store boot and root key; The information security processing module is used for encryption and/or data decryption and/or program.
2. production management system as claimed in claim 1 is characterized in that, described bus system comprises high speed data bus, low speed configuration register bus, bus arbiter, direct memory access transport controller; Bus arbiter is used for controlling each module taking high speed data bus of inserting bus system in the right of priority mode; High speed data bus is used to provide high-speed data channel; The high-speed programmable processor is used for being configured by the control register of low speed configuration register bus to each module of access bus system.
3. production management system as claimed in claim 1 or 2 is characterized in that, embedded chip also comprises the high-speed bus expansion interface that is connected with the network bridging chip, and this high-speed bus expansion interface inserts bus system.
4. production management system as claimed in claim 3, it is characterized in that, embedded chip also comprises control of authority module and high-speed bus expansion interface, and control of authority module and high-speed bus expansion interface insert bus system, is used for realizing by fingerprint recognition user's rights management.
5. production management system as claimed in claim 4 is characterized in that the control of authority module comprises fingerprint identification module.
6. as claim 1,2,4 or 5 described production management systems, it is characterized in that the information security processing module comprises randomizer, asymmetric encryption module, Hash module and symmetric cryptography module.
7. production management system as claimed in claim 6 is characterized in that, randomizer, asymmetric encryption module and Hash module are used to realize network authentication; The symmetric cryptography module is used to realize the encryption of local data encryption storage and network data transmission.
8. production management system as claimed in claim 7 is characterized in that, also comprises third party certification authority and remote control terminal, and described LAN (Local Area Network), third party certification authority, remote control terminal insert the internet, are used to realize network security.
9. as claim 6 or 7 described production management systems, it is characterized in that, also comprise real-time audio and video collaborative process module, this real-time audio and video collaborative process module connecting system bus is used to handle real-time audio stream and/or video flowing.
10. safe implementation method on the sheet in the production management system is characterized in that, comprising:
Step 101, client embedded hardware support platform is written into root key by the boot in the programmable storage;
Step 102, client embedded hardware support platform is written into expanded keys encrypted in the external memory storage, the expanded keys of information security processing module decrypt encrypted;
Step 103, data and/or program in the expanded keys deciphering external memory storage after the information security processing module utilization deciphering;
Step 104 starts the operating system and program.
11. safe implementation method on the sheet is characterized in that in the production management system as claimed in claim 10, also comprises before the step 101: carry out password or fingerprint authentication.
12. network security implementation method in the production management system is characterized in that, comprising: the data to client embedded hardware support platform transmission in LAN (Local Area Network) or the internet are carried out symmetric cryptography and/or asymmetric encryption.
13. network security implementation method as claimed in claim 12 is characterized in that, in the internet, realizes transmit leg and/or take over party's authentication by third party certification authority.
14. real-time audio and video sending method in the production management system is characterized in that, comprising:
Step 141, the real-time audio and video collaborative process module of transmit leg is carried out compressed encoding to data stream;
Step 142, the information security processing module of transmit leg is carried out symmetric cryptography to data stream;
Step 143, transmit leg carries out Network Transmission with data encrypted stream.
15. real-time audio and video sending method as claimed in claim 14 is characterized in that, in the step 133, transmit leg carries out Network Transmission with data encrypted stream by the high-speed bus expansion interface.
16. real-time audio and video method of reseptance in the production management system is characterized in that, comprising:
Step 134, the take over party receives data encrypted stream;
Step 135, take over party's information security is handled the data stream of mould decrypt encrypted;
Step 136, take over party's real-time audio and video collaborative process module decompresses to the data stream after deciphering.
17. real-time audio and video method of reseptance as claimed in claim 16 is characterized in that, in the step 134, the take over party receives data encrypted stream by the high-speed bus expansion interface.
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