CN112862444A - Industrial drawing system supporting equipment cooperation - Google Patents
Industrial drawing system supporting equipment cooperation Download PDFInfo
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- CN112862444A CN112862444A CN202110184502.4A CN202110184502A CN112862444A CN 112862444 A CN112862444 A CN 112862444A CN 202110184502 A CN202110184502 A CN 202110184502A CN 112862444 A CN112862444 A CN 112862444A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q10/00—Administration; Management
- G06Q10/10—Office automation; Time management
- G06Q10/101—Collaborative creation, e.g. joint development of products or services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
- H04L63/0876—Network architectures or network communication protocols for network security for authentication of entities based on the identity of the terminal or configuration, e.g. MAC address, hardware or software configuration or device fingerprint
Abstract
The invention relates to the technical field of collaborative drawing, and discloses an industrial drawing system supporting equipment collaboration, which comprises: operating server software of industrial design collaborative drawing system and managing collaborative drawing usersCDUiCloud computing server with drawing authorityCCScdsOperating user side software of industrial design collaborative drawing system and being used for collaborative drawing userCDUiComputer terminal for collaboratively editing industrial design productCPTi(ii) a The industrial design collaborative drawing system comprises a collaborative drawing module, a graph editing and signing module and a collaborative user identity authentication module; when collaborating with drawing usersCDUiWhen sending an editing request of a collaborative design graph to an industrial design collaborative drawing system server, a collaborative user identity authentication module carries out collaborative drawing on usersCDUiAnd carrying out credible identity authentication. The invention solves the problem of how to carry out correct collaborative assembly design among cross-region and cross-enterprise industrial design products and ensures departmentsOr sub-assemblies within an enterprise are sensitive to information security issues.
Description
Technical Field
The invention relates to the technical field of collaborative drawing, in particular to an industrial drawing system supporting equipment collaboration.
Background
Modern enterprises often need to dynamically federate with other enterprises to acquire advantages in fierce market competition, so that the design of products can be completed by the cooperation of different teams distributed in time and space, that is, collaborators in different regions need to collaboratively edit the same graphic object through a network to efficiently design and browse the graphic object together, thereby effectively sharing product data and information. Therefore, the cross-region and cross-enterprise collaborative design of the industrial design product is carried forward, but the collaborative design provides powerful guarantee for the development of the industrial design product and simultaneously faces a new problem, because the past single-user version drawing editing is transparent and safe, once the design drawing is shared by cross-department or even cross-enterprise, the design drawing faces the leakage of some sensitive design information and design knowledge.
Therefore, how to ensure the safety of sensitive information of sub-assemblies in departments or enterprises while carrying out correct collaborative assembly design among cross-region and cross-enterprise industrial design products is a problem to be solved urgently.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides an industrial mapping system supporting equipment cooperation, which aims to solve the technical problem of ensuring the sensitive information safety of sub-assemblies in departments or enterprises while correctly and cooperatively assembling and designing industrial design products across regions and enterprises.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme:
an industrial mapping system supporting device collaboration, comprising: operating server software of industrial design collaborative drawing system and managing collaborative drawing usersCDUiCloud computing server with drawing authorityCCScdsOperating user side software of industrial design collaborative drawing system and being used for collaborative drawing userCDUiComputer terminal for collaboratively editing industrial design productCPTiThe computer terminalCPTiWith cloud computing serverCCScdsCarrying out communication connection;
the industrial design collaborative drawing system comprises a collaborative drawing module, a graph editing signature module and a collaborative user identity authentication module, wherein the collaborative user identity authentication module is respectively in communication connection with the collaborative drawing module and the graph editing signature module;
when collaborating with drawing usersCDUiAt computer terminalCPTiWhen the editing request of the collaborative design graph is sent to the server side of the industrial design collaborative drawing system, the collaborative user identity authentication module carries out the collaborative drawing userCDUiAnd carrying out credible identity authentication.
Further, the collaborative drawing userCDUiAnd signing the edited graphic information on the graphic editing and signing module, authenticating the signature by the graphic editing and signing module, and storing the graphic editing information by the collaborative drawing module after the signature is authenticated as a legal signature.
Further, the collaborative user identity authentication module is used for collaboratively drawing usersCDUiAnd carrying out credible identity authentication, wherein the authentication method comprises the following steps:
step one, collaborate drawing usersCDUiRegistering the user collaborative editing authority on the collaborative user identity authentication module specifically as follows:
the method comprises the following steps of cooperating with a user identity authentication module to set the following parameters:
firstly selecting prime numbers by cooperating with a user identity authentication modulepAndGP(p)above primitive elementgThen, a one-way hash function is selectedhThen selecting a random numberxAs a private key, satisfyx∈Z * p And isgcd(x,p-1)=1Calculatingy=g x modp；
② drawing users in coordinationCDUiSubmitting own identity information to the cooperative user identity authentication moduleIDi；
Third, the cooperative user identity authentication module confirms the cooperative drawing userCDUiAfter the identity of (2), randomly selectingk∈Z * p To make it satisfygcd(k,p-1)=1The following calculations were performed:
r≡g k modp；
s≡[x(h(IDi)+r)-k]mod(p-1)；
fourthly, cooperating with the user identity authentication module to pass through a credible channel(r,s)And(p,g,y,h)delivery to collaborative drawing usersCDUiThe collaborative drawing userCDUiPassing through typey h(IDi)+r≡rgsmodp To verify(r,s)Whether it is indeed sent by the cooperative user identity authentication module;
if the above formula is true, the registration is successful, otherwise the registration is failed;
step two, the cooperative user identity authentication module performs cooperative drawing on the usersCDUiPerforming credible identity authentication, specifically as follows:
drawing users in coordinationCDUiSending to a collaborative user identity authentication module(r,IDi)Requesting to perform credible identity authentication;
② cooperating with the random selection of user identity authentication modulen∈Z * p ，gcd(n,p-1)=1The following calculations were performed:
T≡g n modp；
collaborative user identity authentication module for mapping collaborative usersCDUiSendingT；
③ drawing users in coordinationCDUiReceive fromTAfter that, the calculation is started:
C≡T s modp；
collaborative drawing userCDUiSending to a collaborative user identity authentication moduleC；
Receiving by cooperating with user identity authentication moduleCThereafter, it is started to verify whether the following equation holds:
y n(h(IDi)+r) ≡r n Cmodp；
if the above equation is true, the collaborative drawing user is indicatedCDUiAnd if the user has legal collaborative editing authority and is a trusted user, the authentication is finished.
Further, the graphic editing and signing module is used for collaboratively drawing usersCDUiThe signature of (2) is authenticated, and the specific authentication method is as follows:
S1collaboratively drawing usersCDUiRegistering the user collaborative editing authority on the graphic editing signature module as follows：
Among the known collaborative editing signature groups arenA member;
graphic editing signature module orderM 1 、M 2 Two managers collaboratively editing a signature group;
collaborative drawing userCDUiTo collaboratively edit a user to be signed in a signature group,H(·)is a safetyHashA function of, andH：{0，1}*→{0，1} t ；
M 1 selecting a length of2lNumber ofnAnd is andn=p·q，p，qfor a safe prime number, then choose the second residueQR (n)Of (5)GIf it is to be calculatedGDiscrete logarithm of (a), which is a mathematical problem,gis composed ofGA generator of (2);
M 1 randomly selecting numbersxAs a private key of its own, the private key,x∈ R Gand throughy=g x (modn)Calculating a public key;
M 2 also produces a length of2lIs/are as followsRSADieNAnd is andN=P·Q，P，Qalso a security prime number, hereN＜nAnd randomly selectE，D∈ R Z * N And satisfyE·D≡1(modΦ(N))The public key isY={n，y，g，l，E，N}The private key is{x，p，q，P，Q， D}；
Collaborative drawing userCDUiAdding a collaborative editing signature group by executing the following operations:
M 1 random selectionxiAnd is andxi∈ R Gand calculateIDi=xi+xAndyi=g xi modnthen is connected toxiSending to collaborative drawing usersCDUi，(IDi，yi) Is sent toM 2 ；
S2Collaboratively drawing usersCDUiGraphic information edited on the graphic editing signature modulemAnd performing signature authentication specifically as follows:
it is known thatmFor computer terminalsCPTiCollaborative drawing user onCDUiThe edited graphical information;
collaborative drawing userCDUiRandom selectionri∈ R GAnd the following calculations were performed:
ci=H(T‖yi‖g‖g ri ‖m)；
si=ri－cixi；
here, theTIs time stamped and then transmitted(IDi，m，ci，si，T)To giveM 2 ；
M 2 Is connected to(IDi，m，ci，si，T)Then, first, checkTWhether it is consistent with the current time and the userIDiWhether it has been revoked, and then searching andIDicorresponding toyi=g xi And verifies whether the following equation holds:
ci=H(T‖yi‖g‖g si yi ci ‖m)；
if the above equation is true, then the signature is known to be true,M 2 then randomly selectr'i∈ R G、T'And the following calculations were performed:
c=H(T‖T'‖y‖g‖g r'i g si yi ci )(modN)；
c'=H(T‖T'‖y‖g‖g r'i g si yi ci ) D (modN)；
s'i=r'i-cx；
M 2 sending(T'‖s'i‖c'‖c)Collaborative mapping userCDUiAnd is combined with(IDi‖m‖T‖T'‖ci‖si‖r'i‖c)Is stored toIDiIn the corresponding signature list, opening the signature at a later date;
collaborative drawing userCDUiReceive from(T'‖s'i‖c'‖c)Then, first, checkc=(c') E (modN)Then calculates= s'i+ri－cxi；
Thereafter, collaboratively drawing usersCDUiPublishing graphical edit information to a graphical edit signature modulemIs signed(T， T'，c，c'，s)。
Further, the graphic editing and signing module is used for collaboratively drawing usersCDUiSignature made(T，T'，c，c'，s)The validity of (2) is authenticated, specifically as follows:
the graphic editing signature module edits the signature according to the received information(T，T'，c，c'，s)Checking upc=(c') E (modN)If true, computing and checkingc=H(T‖T'‖y‖y c g s ‖m)If the above formula is true, the signature authentication is successful.
Further, the computer terminalCPTiClient side and cloud computing server operated in industrial design collaborative drawing systemCCScdsThe industrial design on the system is cooperated with the drawing system server to carry out communication connection with each other.
(III) advantageous technical effects
Compared with the prior art, the invention has the following beneficial technical effects:
the invention carries out credible identity authentication on the collaborative drawing users through the collaborative user identity authentication module, thereby realizing the purpose of ensuring the credit of the collaborative drawing users distributed on each computer terminal in different places; and the graph information edited by the collaborative drawing users is subjected to anonymous traceable signature authentication through the graph editing signature module, so that the credit of the collaborative drawing users distributed on each computer terminal in different places is further ensured;
therefore, the technical effect of ensuring the safety of sensitive information of sub-assemblies in departments or enterprises is realized while the correct collaborative assembly design is carried out among the cross-region and cross-enterprise industrial design products.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An industrial mapping system supporting device collaboration, comprising: operating server software of industrial design collaborative drawing system and managing collaborative drawing usersCDUi(i=1,2,…,n)Cloud computing server with drawing authorityCCScdsOperating user side software of industrial design collaborative drawing system and being used for collaborative drawing userCDUiComputer terminal for collaboratively editing industrial design productCPTi(i=1,2,…,n)The computer terminalCPTiClient side and cloud computing server operated in industrial design collaborative drawing systemCCScdsThe industrial design on the system cooperates with the server of the drawing system to carry out communication connection with each other;
the industrial design collaborative drawing system comprises a collaborative drawing module, a graph editing and signing module and a collaborative user identity authentication module, wherein the collaborative user identity authentication module is in communication connection with the collaborative drawing module and the graph editing and signing module respectively;
to effectively ensure that each computer terminal is distributed in different placesCPTiCollaborative drawing user onCDUiReputation of when collaborating with drawing usersCDUiAt computer terminalCPTiThe industrial design collaborative drawing system on the client side operates on the cloud computing serverCCScdsOnWhen the server side of the industrial design collaborative drawing system sends an editing request of a collaborative design graph, a collaborative user identity authentication module of the industrial design collaborative drawing system starts to carry out collaborative drawing on usersCDUiAnd carrying out credible identity authentication, wherein the credible identity authentication method comprises the following steps:
step one, a computer terminalCPTiCollaborative drawing user onCDUiThe method comprises the following steps of carrying out user collaborative editing authority registration on a collaborative user identity authentication module of the industrial design collaborative drawing system, specifically:
the method comprises the following steps of cooperating with a user identity authentication module to set the following parameters:
firstly selecting prime numbers by cooperating with a user identity authentication modulepAndGP(p)above primitive elementgThen, a one-way hash function is selectedhThen selecting a random numberxAs a private key, satisfyx∈Z * p And isgcd(x,p-1)=1Calculatingy=g x modp；
② drawing users in coordinationCDUiSubmitting own identity information to the cooperative user identity authentication moduleIDi；
Third, the cooperative user identity authentication module confirms the cooperative drawing userCDUiAfter the identity of (2), randomly selectingk∈Z * p To make it satisfygcd(k,p-1)=1The following calculations were performed:
r≡g k modp；
s≡[x(h(IDi)+r)-k]mod(p-1)；
fourthly, cooperating with the user identity authentication module to pass through a credible channel(r,s)And(p,g,y,h)delivery to collaborative drawing usersCDUiThe collaborative drawing userCDUiPassing through typey h(IDi)+r≡rgsmodp To verify(r,s)Whether it is indeed sent by the cooperative user identity authentication module;
if the above formula is true, the registration is successful, otherwise the registration is failed;
step two, the collaborative user identity authentication module of the industrial design collaborative drawing system is used for the computer terminalCPTiOnCollaborative drawing userCDUiPerforming credible identity authentication, specifically as follows:
drawing users in coordinationCDUiSending to a collaborative user identity authentication module(r,IDi)Requesting to perform credible identity authentication;
② cooperating with the random selection of user identity authentication modulen∈Z * p ，gcd(n,p-1)=1The following calculations were performed:
T≡g n modp；
collaborative user identity authentication module for mapping collaborative usersCDUiSendingT；
③ drawing users in coordinationCDUiReceive fromTAfter that, the calculation is started:
C≡T s modp；
collaborative drawing userCDUiSending to a collaborative user identity authentication moduleC；
Receiving by cooperating with user identity authentication moduleCThereafter, it is started to verify whether the following equation holds:
y n(h(IDi)+r) ≡r n Cmodp；
if the above equation is true, the collaborative drawing user is indicatedCDUiIf the user has legal collaborative editing authority and is a trusted user, the authentication is finished;
the authentication protocol is carried out based on a challenge/response mode, even if an attacker obtains a collaborative drawing user through monitoringCDUiAll information exchanged in one authentication, whereas the authentication information mentioned abovenThe one-time random number generated for the cooperative user identity authentication module is different from authentication, if the cooperative drawing user requesting identity authenticationCDUiIf the user is fake, the user identity authentication module is used for verificationy n(h(IDi)+r) ≡r n CmodpThe attack will be found out, thereby the authentication result is lostFailure;
as a computer terminalCPTiCollaborative drawing user onCDUiAfter the identity passes the credible authentication of the cooperative user identity authentication module, the industrial design cooperative drawing system allows the cooperative drawing userCDUiEditing of collaborative design graphics is performed by a collaborative drawing module, and after editing is completed, each computer terminal distributed in different places is further ensured for the purpose of ensuringCPTiCollaborative drawing user onCDUiIn order to protect each computer terminalCPTiCollaborative drawing user onCDUiPrivate information of (1), collaborative drawing userCDUiThe graph editing and signing module is required to sign the edited graph information, and the graph editing and signing module allows the collaborative drawing module to store the graph editing information after the signature is authenticated as a legal signature;
computer terminalCPTiCollaborative drawing user onCDUiThe method comprises the following steps of signing the edited graphic information on a graphic editing and signing module of the industrial design collaborative drawing system, authenticating the signature by the graphic editing and signing module, and specifically authenticating the signature by the graphic editing and signing module as follows:
S1computer terminalCPTiCollaborative drawing user onCDUiRegistering the user collaborative editing authority on a graphic editing signature module of the industrial design collaborative drawing system, which is specifically as follows:
among the known collaborative editing signature groups arenA member;
graphic editing signature module orderM 1 、M 2 In order to collaboratively edit two managers of a signature group,M 1 is responsible for the joining, deletion and key distribution of group members,M 2 opening group signature information for identity recognition under the condition of dispute;
collaborative drawing userCDUiTo collaboratively edit a user to be signed in a signature group,H(·)is a safetyHashA function of, andH：{0，1}*→{0，1} t ；
M 1 selecting a length of2lNumber ofnAnd is andn=p·q，p，qfor a safe prime number, then choose the second residueQR (n)Of (5)GIf it is to be calculatedGDiscrete logarithm of (a), which is a mathematical problem,gis composed ofGA generator of (2);
M 1 randomly selecting numbersxAs a private key of its own, the private key,x∈ R Gand throughy=g x (modn)Calculating a public key;
M 2 also produces a length of2lIs/are as followsRSADieNAnd is andN=P·Q，P，Qalso a security prime number, hereN＜nAnd randomly selectE，D∈ R Z * N And satisfyE·D≡1(modΦ(N))The public key isY={n，y，g，l，E，N}The private key is{x，p，q，P，Q， D}；
Collaborative drawing userCDUiAdding a collaborative editing signature group by executing the following operations:
M 1 random selectionxiAnd is andxi∈ R Gand calculateIDi=xi+xAndyi=g xi modnthen is connected toxiSending to collaborative drawing usersCDUi，(IDi，yi) Is sent toM 2 And as a collaborative drawing userCDUiThe group signature certificate of (1);
S2computer terminalCPTiCollaborative drawing user onCDUiGraphic information edited on graphic editing signature module of industrial design collaborative drawing systemmAnd performing signature authentication specifically as follows:
it is known thatmFor computer terminalsCPTiCollaborative drawing user onCDUiThe edited graphical information;
collaborative drawing userCDUiRandom selectionri∈ R GAnd the following calculations were performed:
ci=H(T‖yi‖g‖g ri ‖m)；
si=ri－cixi；
here, theTIs time stamped and then transmitted(IDi，m，ci，si，T)To giveM 2 ；
M 2 Is connected to(IDi，m，ci，si，T)Then, first, checkTWhether it is consistent with the current time and the userIDiWhether it has been revoked, and then searching andIDicorresponding toyi=g xi And verifies whether the following equation holds:
ci=H(T‖yi‖g‖g si yi ci ‖m)；
if the above equation is true, then the signature is known to be true,M 2 then randomly selectr'i∈ R G、T'And the following calculations were performed:
c=H(T‖T'‖y‖g‖g r'i g si yi ci )(modN)；
c'=H(T‖T'‖y‖g‖g r'i g si yi ci ) D (modN)；
s'i=r'i-cx；
M 2 sending(T'‖s'i‖c'‖c)Collaborative mapping userCDUiAnd is combined with(IDi‖m‖T‖T'‖ci‖si‖r'i‖c)Is stored toIDiIn the corresponding signature list, opening the signature at a later date;
collaborative drawing userCDUiReceive from(T'‖s'i‖c'‖c)Then, first, checkc=(c') E (modN)Then calculates= s'i+ri－cxi；
Thereafter, collaboratively drawing usersCDUiPublishing graphical edit information to a graphical edit signature modulemIs signed(T， T'，c，c'，s)；
S3Graphic editing signature module pair computer terminal of industrial design collaborative drawing systemCPTiCollaborative drawing user onCDUiSignature made(T，T'，c，c'，s)The validity of (2) is authenticated, specifically as follows:
the graphic editing signature module edits the signature according to the received information(T，T'，c，c'，s)Checking upc=(c') E (modN)If true, computing and checkingc=H(T‖T'‖y‖y c g s ‖m)If the above formula is true, the signature authentication is successful, otherwise the authentication is failed;
S4graphic editing signature module tracking computer terminal of industrial design collaborative drawing systemCPTiCollaborative drawing user onCDUiThe true identity of (c) is as follows:
group managers when collaborative shared graphical editing is disputedM 1 By opening the computer terminalCPTiCollaborative drawing user onCDUiEditing information for collaborative design graphicsmIs signed(T，T'，c，c'，s)To group managerM 2 Sending a request, group managerM 2 Looking up the identity of the signer from its previously stored information about the signature and sending it to the group managerM 1 Informing to determine the computer terminalCPTiCollaborative drawing user onCDUiThe true identity of.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. An industrial mapping system supporting device collaboration, comprising: operating server software of industrial design collaborative drawing system and managing collaborative drawing usersCDUiCloud computing server with drawing authorityCCScdsOperating user side software of industrial design collaborative drawing system and being used for collaborative drawing userCDUiComputer terminal for collaboratively editing industrial design productCPTiThe computer terminalCPTiWith cloud computing serverCCScdsCarrying out communication connection;
the industrial design collaborative drawing system comprises a collaborative drawing module, a graph editing signature module and a collaborative user identity authentication module, wherein the collaborative user identity authentication module is respectively in communication connection with the collaborative drawing module and the graph editing signature module;
when collaborating with drawing usersCDUiAt computer terminalCPTiWhen the editing request of the collaborative design graph is sent to the server side of the industrial design collaborative drawing system, the collaborative user identity authentication module carries out the collaborative drawing userCDUiAnd carrying out credible identity authentication.
2. The system of claim 1, wherein the collaborative drawing user is a collaborative drawing userCDUiAnd signing the edited graphic information on the graphic editing and signing module, authenticating the signature by the graphic editing and signing module, and storing the graphic editing information by the collaborative drawing module after the signature is authenticated as a legal signature.
3. The system for industrial mapping with device collaboration as claimed in claim 2, wherein the collaborative user identity authentication module maps users to collaborationsCDUiAnd carrying out credible identity authentication, wherein the authentication method comprises the following steps:
step one, collaborate drawing usersCDUiRegistering the user collaborative editing authority on the collaborative user identity authentication module specifically as follows:
the method comprises the following steps of cooperating with a user identity authentication module to set the following parameters:
firstly selecting prime numbers by cooperating with a user identity authentication modulepAndGP(p)above primitive elementgThen, a one-way hash function is selectedhThen selecting a random numberxAs a private key, satisfyx∈Z * p And isgcd(x,p-1)=1Calculatingy=g x modp；
② drawing users in coordinationCDUiSubmitting own identity information to the cooperative user identity authentication moduleIDi；
Third, the cooperative user identity authentication module confirms the cooperative drawing userCDUiAfter the identity of (2), randomly selectingk∈Z * p To make it satisfygcd(k,p-1)=1The following calculations were performed:
r≡g k modp；
s≡[x(h(IDi)+r)-k]mod(p-1)；
fourthly, cooperating with the user identity authentication module to pass through a credible channel(r,s)And(p,g,y,h)delivery to collaborative drawing usersCDUiThe collaborative drawing userCDUiPassing through typey h(IDi)+r ≡rg s modpTo verify(r,s)Whether it is indeed sent by the cooperative user identity authentication module;
if the above formula is true, the registration is successful, otherwise the registration is failed;
step two, the cooperative user identity authentication module performs cooperative drawing on the usersCDUiPerforming credible identity authentication, specifically as follows:
drawing users in coordinationCDUiSending to a collaborative user identity authentication module(r,IDi)Requesting to perform credible identity authentication;
② cooperating with the random selection of user identity authentication modulen∈Z * p ，gcd(n,p-1)=1The following calculations were performed:
T≡g n modp；
collaborative user identity authentication module for mapping collaborative usersCDUiSendingT；
③ drawing users in coordinationCDUiReceive fromTAfter that, the calculation is started:
C≡T s modp；
collaborative drawing userCDUiSending to a collaborative user identity authentication moduleC；
Receiving by cooperating with user identity authentication moduleCThereafter, it is started to verify whether the following equation holds:
y n(h(IDi)+r) ≡r n Cmodp；
if the above equation is true, the collaborative drawing user is indicatedCDUiAnd if the user has legal collaborative editing authority and is a trusted user, the authentication is finished.
4. The system of claim 3, wherein the graphical editing signature module maps users collaborativelyCDUiThe signature of (2) is authenticated, and the specific authentication method is as follows:
S1collaboratively drawing usersCDUiRegistering the user collaborative editing authority on the graphic editing signature module, which is specifically as follows:
among the known collaborative editing signature groups arenA member;
graphic editing signature module orderM 1 、M 2 Two managers collaboratively editing a signature group;
collaborative drawing userCDUiTo collaboratively edit a user to be signed in a signature group,H(·)is a safetyHashA function of, andH：{0，1}*→{0，1} t ；
M 1 selecting a length of2lNumber ofnAnd is andn=p·q，p，qfor a safe prime number, then choose the second residueQR(n)Of (5)GIf it is to be calculatedGDiscrete logarithm of (a), which is a mathematical problem,gis composed ofGA generator of (2);
M 1 randomly selecting numbersxAs a private key of its own, the private key,x∈ R Gand throughy=g x (modn)Calculating a public key;
M 2 also produces a length of2lIs/are as followsRSADieNAnd is andN=P·Q，P，Qalso a security prime number, hereN＜nAnd randomly selectE，D∈ R Z * N And satisfyE·D≡1(modΦ(N))The public key isY={n，y，g，l，E，N}The private key is{x，p，q，P，Q，D}；
Collaborative drawing userCDUiAdding a collaborative editing signature group by executing the following operations:
M 1 random selectionxiAnd is andxi∈ R Gand calculateIDi=xi+xAndyi=g xi modnthen is connected toxiSending to collaborative drawing usersCDUi，(IDi，yi) Is sent toM 2 ；
S2Collaboratively drawing usersCDUiGraphic information edited on the graphic editing signature modulemAnd performing signature authentication specifically as follows:
it is known thatmFor computer terminalsCPTiCollaborative drawing user onCDUiThe edited graphical information;
collaborative drawing userCDUiRandom selectionri∈ R GAnd the following calculations were performed:
ci=H(T‖yi‖g‖g ri ‖m)；
si=ri－cixi；
here, theTIs time stamped and then transmitted(IDi，m，ci，si，T)To giveM 2 ；
M 2 Is connected to(IDi，m，ci，si，T)Then, first, checkTWhether it is consistent with the current time and the userIDiWhether it has been revoked, and then searching andIDicorresponding toyi=g xi And verifies whether the following equation holds:
ci=H(T‖yi‖g‖g si yi ci ‖m)；
if the above equation is true, then the signature is known to be true,M 2 then randomly selectr'i∈ R G、T'And the following calculations were performed:
c=H(T‖T'‖y‖g‖g r i ' g si yi ci )(modN)；
c'=H(T‖T'‖y‖g‖g r i ' g si yi ci ) D (modN)；
s'i=r'i-cx；
M 2 sending(T'‖s'i‖c'‖c)Collaborative mapping userCDUiAnd is combined with(IDi‖m‖T‖T'‖ci‖si‖r'i‖c)Is stored toIDiCorresponding labelIn the name list, for opening the signature at a later date;
collaborative drawing userCDUiReceive from(T'‖s'i‖c'‖c)Then, first, checkc=(c') E (modN)Then calculates=s'i+ ri－cxi；
Thereafter, collaboratively drawing usersCDUiPublishing graphical edit information to a graphical edit signature modulemIs signed(T，T'，c， c'，s)。
5. The system of claim 4, wherein the graphical editing signature module maps users collaborativelyCDUiSignature made(T，T'，c，c'，s)The validity of (2) is authenticated, specifically as follows:
the graphic editing signature module edits the signature according to the received information(T，T'，c，c'，s)Checking upc=(c') E (modN)If true, computing and checkingc=H(T‖T'‖y‖y c g s ‖m)If the above formula is true, the signature authentication is successful.
6. The system according to claim 5, wherein the computer terminal is configured to receive the user input from the userCPTiClient side and cloud computing server operated in industrial design collaborative drawing systemCCScdsThe industrial design on the system is cooperated with the drawing system server to carry out communication connection with each other.
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