CN110276221A - Apply card reading system based on block chain PKI certificate more - Google Patents
Apply card reading system based on block chain PKI certificate more Download PDFInfo
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- CN110276221A CN110276221A CN201910555579.0A CN201910555579A CN110276221A CN 110276221 A CN110276221 A CN 110276221A CN 201910555579 A CN201910555579 A CN 201910555579A CN 110276221 A CN110276221 A CN 110276221A
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- Prior art keywords
- certificate
- bca
- block chain
- industry
- intelligence contract
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/0013—Methods or arrangements for sensing record carriers, e.g. for reading patterns by galvanic contacts, e.g. card connectors for ISO-7816 compliant smart cards or memory cards, e.g. SD card readers
-
- 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
- G06Q20/00—Payment architectures, schemes or protocols
- G06Q20/38—Payment protocols; Details thereof
- G06Q20/40—Authorisation, e.g. identification of payer or payee, verification of customer or shop credentials; Review and approval of payers, e.g. check credit lines or negative lists
- G06Q20/401—Transaction verification
Abstract
The invention discloses apply card reading system based on block chain PKI certificate more, it is related to smartcard identification and technical field of communication safety and comprising, system includes reader device, mobile terminal, industry background system and the more Application Certificate system DMcert of block chain, reader device has ESAM chip, it uses the key and certificate of more application file structure storage every profession and trades, there is the distributed conglomerate node trust model of hierarchical structure in the more Application Certificate system DMcert of block chain, be deployed with intelligent contract in the model.It mostly can be improved the convenience that user's load is traded using card reading system in the present invention, and can effectively promote the safety of environment for card use using the form of the more Application Certificate system DMcert of block chain.
Description
Technical field
The present invention relates to smartcard identifications and technical field of communication safety and comprising, more particularly to based on block chain PKI certificate
Apply card reading system more.
Background technique
Outlet that the load of the trading cards such as water, electricity, combustion gas, traffic in resident's basic living must go its own or
The comprehensive website of such as e-supermarket, this is very inconvenient for the common people, therefore has expedited the emergence of the card reader technology of inter-trade smart card,
The technology can be such that the smart card of a variety of industries is written and read using the same card reader.
Currently, card reader is generally to pass through the PSAM/SAM card number increased in card reader in support of the extension to smart card
What amount was realized, since this extended mode not only needs to occupy the big quantity space of reader device, and complexity is welded, extends more
Using obviously unrealistic.Moreover, current environment for card use is mostly PKI (Public Key Infrastructure) technology based on trusted party,
Studies have shown that due to the trust of PKI technology extremely concentrates on CA (certificate authority) and there are Single Point of Faliures and unpredictable
Threat, therefore, trusted party CA is not fully believable.
Summary of the invention
The embodiment of the invention provides card reading system is applied based on block chain PKI certificate, it can solve existing skill more
The problem of art.
The present invention provides based on block chain PKI certificate apply card reading system, including by network connection one
Reader device, mobile terminal, industry background system and the more Application Certificate system DMcert of block chain, the card reader risen is set
There is ESAM chip, which stores the key and certificate of every profession and trade using more application file structures in standby；
The more Application Certificate system DMcert of block chain have the distributed conglomerate node trust model of hierarchical structure,
The distribution conglomerate node trust model serves as the role of one CA of tradition, the letter of traditional CA using a large amount of miner's node BCA
Appoint the BCA node being dispersed in block chain network, the first layer in the distribution conglomerate node trust model is root
BCA, the last layer are to act on behalf of BCA, remaining node is father BCA, other every profession and trade root BCA to father BCA in addition to acting on behalf of BCA and having intersection
Form single tree, all data services acted on behalf of BCA and carry out conglomerate jointly, the distribution conglomerate node
The overall situation is deployed with intelligent contract in trust model, and the intelligence contract is the application program operated on block chain, and contract is write
Enter in block chain.
In the present invention card reading system is applied based on block chain PKI certificate more, had the advantages that
(1) reader device more applied is supported to can overcome the disadvantages that the limitation of current multi-application smart card hair fastener；
(2) block chain DMcert system supports the operation of conglomerate certificate, and provides higher safety for environment for card use；
(3) this method can be deployed on portable equipment, be realized " one machine of a family ", while saving social cost, improved and occupied
The convenience of the transaction such as people's load.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the composition schematic diagram for more applying card reading system in the present invention based on block chain PKI certificate；
Fig. 2 is the composition schematic diagram of the more Application Certificate system DMcert of block chain；
Fig. 3 is the schematic diagram of traditional trust model；
Fig. 4 is the schematic diagram of distributed conglomerate node trust model in the present invention；
Fig. 5 is the relation schematic diagram of access control intelligence contract ACC and industry intelligence contract ISC；
Fig. 6 is the composition of reader device and the connection schematic diagram with other parts.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Referring to figs. 1 to Fig. 6, the present invention provides apply card reading system, the system packet based on block chain PKI certificate more
Include reader device, mobile terminal, industry background system and the more Application Certificate system DMcert of block chain.
In practical applications, of the invention mostly also to need to cooperate smart card, application provider and hair using card reading system
Mechanism for card could use, and industry background system, mobile terminal, application provider and the card sending mechanism in the system are for smart card
The management platform of more application authorization services is provided with reader device, is the prior art, therefore do not do specific introduction.
The reader device includes the standardized Bluetooth interface for wirelessly communicating with mobile terminal, embedded-type security access
Module (ESAM) in the reader device, uses more application files as memory and control built-in chip type in the ESAM chip
Structure stores every profession and trade key and certificate, to ensure that every profession and trade application is independent interference-free.
There is distributed conglomerate node trust model, such as Fig. 2 and 4 in the more Application Certificate system DMcert of block chain
It is shown.Traditional trust model needs a credible CA in single industry PKI system to sign and issue the number of the industry in Fig. 3
Certificate, all CA form tree in trust structure, and the root of the tree is Root-CA, i.e. root CA.In the PKI system of conglomerate
In system, the certificate that CA (Agent-CA) signs and issues multiple industries is acted on behalf of usually using one, except finally acting on behalf of CA has intersection, higher level
All CA still form tree, and Root-CA is tree root.This means that two serious safety defects: once Root-CA by
To attack, each CA in system can be affected；Once Agent-CA is under attack, all industries in system all can be by
To influence, and agency is more, influences bigger.Enhance safety in block platform chain realize distributed trust model
Property, distributed conglomerate node trust model of the invention from industry root CA to intermediate CA again to all third parties of final CA all
It is realized in block chain network, the function of traditional CA is realized by miner's node (Agent node) in block chain, miner's node
Circle in BCA such as Fig. 4 indicates that miner's node BCAs in the present invention is the block chain link that its function is completed instead of tradition CA
Traditional CA is not simply placed in block chain network by point.Therefore, the trust of originally one CA is dispersed to block chain network
In a large amount of BCA node, these nodes safeguard the operation and related data of CA certificate jointly.First layer is root BCA in the model,
The last layer is to act on behalf of BCA, for acting on behalf of the end-user certificate for signing and issuing every profession and trade, between first layer and the last layer
BCA is father BCA.Each layer of BCA node all uses distributed computing technology to store in the distribution conglomerate node trust model
It in block chain, is authorized between all BCA nodes by certificate, upper one layer is next layer of sign entitlement certificate.Except last
One layer of the BCA that acts on behalf of has other than intersection, and the root BCA to father BCA of other every profession and trades forms single tree, all agencies
BCA then safeguards the local certificate and related data of multiple industries jointly.
Certificate operation requests in the present invention are as the transaction (affairs/transaction) in block chain by miner's node
BCAs verifies, is packaged into block, blacklist (revocation) is added and is written local block chain storage etc..Miner's node can replace tradition
CA completes its function, and eliminates signature and CRL (Certificate Revoke List, certificate repository revocation list) or OCSP
(Online Certificate Status Protocol, the inquiry of certificate presence) response service.In addition, Hash verification is demonstrate,proved
The mode of book is simple and quick.
The block chain network of root BCA is safeguarded by one-level management person in Fig. 4, can have plurality of layers father BCA later, by later stages
Other manager's maintenance, acts on behalf of BCA and is safeguarded by final public administration person.Root BCA signs and issues industry root certificate certainly.Act on behalf of BCA completion
The function of traditional proxy CA is more with being signed and issued according to the certificate of authority for terminal by father's BCA sign entitlement certificate of any industry
The ability of a industry certificate, the father BCA that wherein father BCA can be root BCA or be trusted by root BCA.To realize traditional proxy CA
Function, act on behalf of BCA including at least two class certificates: mine card and the industry certificate of authority, mine card are certificates inside block chain, are to prove
Act on behalf of that BCA is authentic and valid, evidence with grant a certificate ability.The BCA node tool of the certificate is held in the statement of the industry certificate of authority
There is the power for signing and issuing the sector applications certificate.In addition, the distribution conglomerate node trust model further includes being presented to
The final industry certificate of reader device, is signed and issued by acting on behalf of BCA.
The overall situation is deployed with intelligent contract in the distribution conglomerate node trust model, and the intelligence contract is considered as
It is the application program operated on block chain, which is written multiple contracts, area in block chain in the form of software code
Block chain can run the data of multiple business.By taking water industry as an example, intelligent contract can write and define the operation of water industry certificate
Agreement and algorithm.
Trigger condition and response operation are pre-defined in the intelligence contract, affairs can trigger function code in contract
It executes.The more Application Certificate system DMcert of block chain by the overall situation deployment intelligent contractual control conglomerate certificate operation with
Management, the intelligence contract includes two class intelligence contracts, is respectively defined as access control intelligence contract ACC and industry intelligence contract
ISC.Only one ACC in the more Application Certificate system DMcert of block chain, the intelligence contract first define credentials verification process
The selection in middle verifying path, it is therefore an objective in light client light-client quick search and flow congestion is avoided, secondly, access
Control intelligence contract ACC is deployed on industry contract ISC, is responsible for the specific ISC of triggering.Access control contract letter defined below
Number:
Register Authority M: address MmWith trust authority Mc
Register the card reader in special domain: address RmWith trust authority Rc
Register light client: address LmWith the L of " free " or " busy " state of being ins
Add card reader RmTo administrative center Mi
Add access path control: C=(Mm,Dm,Lm,Ls, p), p indicates access path control protocol
Select light client light-client:C → Lm, Ls
When reader device and intelligent card mutual authentication, reader device submits certification verification request to block catenary system,
Access control intelligence contract ACC triggers selection light client light-client predetermined using checking request as input
Function code distribution verifying path.In addition, including all industry intelligence contract ISC in access control intelligence contract ACC storage
Address, certificate any operation (application, update, revocation, verifying etc.) unique industry intelligence contract ISC can be triggered, such as
Fig. 5.
There are multiple industry intelligence being defined in global ether mill block chain in the more Application Certificate system DMcert of block chain
Contract ISC, each ISC both correspond to an industry, formulate the agreement and rule that certificate operates by corresponding industry, are defined below
The handling function of certificate in industry intelligence contract ISC:
| Initialize(x,x,..,x) |
| Create(x,x,..,x) |
| Check(x,x,..,x) |
| Signing(x,x,..,x) |
| Update(x,x,..,x) |
| Revoke(x,x,..,x) |
Assuming that acting on behalf of in the block chain network of BCA has certificate in n industry intelligence contract ISC, i-th of ISC defined below
Operation:
1) create and initialize: father BCA calls creation function to dispose a new industry intelligence contract on block chain
The address of new contract is returned to block chain network during creation by ISC, and after deployment success, all BCA nodes can be visited
Ask it.
Initialization function defines relevant to industry all information, each ISC include its trade information (such as industry ID,
Public key) and relevant hash algorithm, trade information includes globally unique profession identity symbol IID, access control intelligence contract ACC
IID is accorded with by profession identity and triggers corresponding ISC, and hash algorithm is for calculating the calculation for being loaded into certificate cryptographic Hash in block chain
Different encryption methods, such as RSA cryptographic algorithms, ECC algorithm, Ed25519 may be selected in method, a block chain.Industry intelligence contract
ISC also safeguards the variable of one group of array and certificate revocation mapping, and array includes the list of certificate, it is also possible that often
The validity period of a certificate and some other parameter information, list of the certificate revocation mapping comprising cancellation of doucment.
2) certificate request C is checkedi: act on behalf of BCA comparison certificate request CiWith trade information existing in block chain network, Ci=1
It indicates to check correctly, otherwise refuse, with C={ c1,c2,c3,…,cnIndicate correctly all requests.
3) grant a certificate requests Si: acting on behalf of BCA, X.509 mixed format generates certificate according to improved block chain, using altogether
Knowledge mechanism generates the block comprising certificate into block chain, with S={ s1,s2,s3,…,snIndicate all certificates signed and issued column
Table.
4) certificate request U is updatedi: industry background system applies for again or acts on behalf of that BCA initiates Ci', step 2), 3) is repeated, but
It is original SiHash be added industry intelligence contract ISC certificate revocation mapping table, Si=UiIndicate updated certificate column
Table.
5) cancellation of doucment requests Ri: the certificate hash that addition needs to cancel to industry intelligence certificate ISC certificate revocation maps
Table, with R={ r1,r2,r3,…,rnIndicate all list of cert cancelled.
Industry intelligence contract ISC is started by access control intelligence contract ACC, and the certificate request that industry background system is initiated is made
Check function, C are triggered for input affairsi=1 Signing letter as incoming event triggering ACC registration & addition function and ISC
Number, ACC registration addition function are only executed in industry initial registration, later real-time update.Ci'=1 and Ri=1 triggering
Update&Revoke function.In addition, including two kinds of data structures in industry intelligence contract ISC storage, array and certificate revocation reflect
It penetrates, storage of array S={ s1,s2,s3,…,snIn siHash, cancellation of doucment R={ r1,r2,r3,…,rnIn riHash add
It is added in revocation mapping.
Card is signed and issued to sub- BCA from root BCA to every grade of block chain network of BCA all at least one intelligent contract, father BCA is acted on behalf of
When book, added by the way that the Hash record of certificate to be completed to the signature to certificate in the intelligent contract of father BCA, and contract address
To the extended field for mixing X.509 certificate format.Root BCA is logical to intermediate BCA sign entitlement certificate (public key comprising intermediate BCA)
It crosses and realizes the Hash record of the certificate of authority in the intelligent contract of root BCA；Intermediate BCA (is wrapped to BCA sign entitlement certificate is acted on behalf of
Containing the public key for acting on behalf of BCA) by the way that the Hash record of the certificate of authority is realized in intermediate BCA intelligence contract；BCA is acted on behalf of to client
End sign and issue industry certificate (public key comprising industry) by by the Hash record of industry certificate in the industry intelligence contract for acting on behalf of BCA
It is realized in ISC.The complete certificate of authority signed and issued is stored in the intelligent contract of current BCA, acts on behalf of the industry intelligence contract of BCA
ISC is stored with the hash of complete the industry certificate of authority and final device certificate that intermediate BCA is issued；The intelligent contract of intermediate BCA
In be stored with the complete intermediate BCA certificate of authority；Complete root certificate is stored in the intelligent contract of root BCA.BCA is acted on behalf of to sign and issue most
Whole industry certificate is the last one certificate element of trust model, and in addition to industry certificate, other is all the certificate of authority.Due to block
Certificate in chain is not signed, therefore traditional certificate signature validation checks that certificate hash is stored in block chain in block chain
In presence replace, the public key for verifying signature is the address of certificate hash storage in block chain.Industry intelligence contract ISC is deposited
The hash of final industry certificate is contained, final industry certificate is by checking certificate hash in the industry intelligence contract ISC for acting on behalf of BCA
In presence verify.Industry intelligence contract ISC is stored with the complete industry certificate of authority, each certificate of authority in addition to root certificate
It can be verified by checking presence of the certificate hash in father's BCA intelligence contract.It is realized with this from final certificate (leaf card
Book) the verifying path of root certificate into BCA tree.
Industry root BCA block chain network at least one intelligent contract in the distribution conglomerate node trust model
About, which has recorded complete industry root certificate and every layer of father's BCA block chain network all at least one intelligent contracts, should
Intelligent contract includes that the identity of sub- BCA and address, the identity of record and address constitute in trade network from BCA is acted on behalf of to root BCA
Certification authentication path, which can be used to verify the trust chain of entire certificate agency.In power industry, intelligence
Energy contract is defined in electric industry agreement and rule under global child node, can negotiate formulation by electric power enterprise and belong to the industry
Unique contract, which disposes under the control of father BCA, makes attacker that malice industry contract can not be written easily.
For smart card in the communication process with reader device, smart card calls the row of corresponding document by application identifier
Industry certificate completes two-way authentication to carry out network verification in block chain.
The reader device is managed work using ESAM chip, which has SPI interface and two can be with
The USART interface (general serial coffret) of compatible 7816 interface of ISO/IEC, as shown in Figure 6.It is non-in reader device
Contact transmits integrated chip 14443 interface of ISO/IEC and SPI interface, and the SPI interface of the SPI interface and ESAM chip is logical
Letter, 14443 interface of ISO/IEC are then interacted with contact type intelligent card.Two USART interfaces simulation two of ESAM chip
A 7816 interface of ISO/IEC, for being interacted with contact intelligent card.
Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the scope of the invention.
Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art
Mind and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies
Within, then the present invention is also intended to include these modifications and variations.
Claims (8)
1. applying card reading system based on block chain PKI certificate, which is characterized in that including by being connected to the network together more
Reader device, mobile terminal, industry background system and the more Application Certificate system DMcert of block chain, in the reader device
With ESAM chip, which stores the key and certificate of every profession and trade using more application file structures；
The more Application Certificate system DMcert of block chain have the distributed conglomerate node trust model of hierarchical structure, this point
Cloth conglomerate node trust model plays the part of the role of traditional CA using miner's node BCAs, and the trust of traditional CA is dispersed to area
BCA node in block chain network, the first layer in the distribution conglomerate node trust model is root BCA, and the last layer is
BCA is acted on behalf of, remaining node is father BCA, other every profession and trade root BCA form tree-shaped knot to father BCA in addition to acting on behalf of BCA by intersecting
Structure, all data services acted on behalf of BCA and carry out conglomerate jointly, overall situation portion in the distribution conglomerate node trust model
There is intelligent contract in administration, and the intelligence contract is the application program operated on block chain, and contract is written in block chain.
2. applying card reading system based on block chain PKI certificate as described in claim 1, which is characterized in that the intelligence more
Energy contract includes access control intelligence contract ACC and industry intelligence contract ISC, the more Application Certificate system DMcert of block chain
The quantity of middle access control intelligence contract ACC is one, and the access control intelligence contract ACC first defines certification authentication
The selection that path is verified in journey, enables light client light-client quick search and to avoid flow congestion, secondly described in
Access control intelligence contract ACC is deployed on industry contract ISC, is responsible for the specific industry intelligence contract ISC of triggering.
3. applying card reading system based on block chain PKI certificate as claimed in claim 2, which is characterized in that the reading more
When card device equipment and intelligent card mutual authentication, reader device submits certification verification request, the access control to block catenary system
Intelligence contract ACC is made using checking request as input, triggers selection light client light-client function generation predetermined
Code is to distribute verifying path, while access control intelligence contract ACC is stored with the address of all industry intelligence contract ISC, certificate
Any operation can trigger unique industry intelligence contract ISC.
4. applying card reading system based on block chain PKI certificate as claimed in claim 2, which is characterized in that the row more
The operation of industry intelligence contract ISC includes creation and initializes, checks, signs and issues, updates, cancels, and father BCA calls wound in creation operation
It builds function and disposes new industry intelligence contract ISC on block chain, the address of new contract is returned to block chain during creation
Network, all BCA nodes can access the new contract after deployment success；It is defined in initialization operation relevant to industry all
Information；Check to act on behalf of have trade information in BCA comparison check certificate request and block chain network in operation, to determine that certificate is asked
Seeking Truth is no legal；Sign and issue operation in act on behalf of BCA according to improved block chain mixing X.509 format generate certificate, utilize common recognition
Mechanism generates the block comprising certificate into block chain；It updates industry background system in operation and applies for or act on behalf of that BCA is initiated again
Grant a certificate request, and repeat to sign and issue operation, but industry intelligence contract ISC certificate is added in the hash of original issued certificate
Cancel mapping table；Addition needs the certificate hash that cancels to industry intelligence contract ISC certificate revocation mapping table in destruction operation；Institute
Certificate revocation mapping table is stated to be safeguarded by industry intelligence contract ISC.
5. applying card reading system based on block chain PKI certificate as claimed in claim 2, which is characterized in that Mei Gesuo more
Stating industry intelligence contract ISC all includes its trade information and relevant hash algorithm, and trade information includes globally unique industry
Identifier IID, the access control intelligence contract ACC accord with IID by profession identity and trigger corresponding industry intelligence contract ISC,
Hash algorithm is loaded into certificate cryptographic Hash in block chain for calculating.
6. applying card reading system based on block chain PKI certificate as described in claim 1, which is characterized in that the generation more
Manage BCA and include at least two class certificates: mine card and the industry certificate of authority, mine card is certificate inside block chain, be prove to act on behalf of BCA it is true
The real effective, evidence with grant a certificate ability；The BCA node that the certificate is held in the statement of the industry certificate of authority, which has, signs and issues the row
The power of portion's Application Certificate out of trade；BCA is acted on behalf of by any industry father BCA sign entitlement certificate, this acts on behalf of BCA according to the certificate of authority
Multiple industry certificates are signed and issued for terminal, wherein father BCA is the root BCA or intermediate BCA for root BCA trust.
7. applying card reading system based on block chain PKI certificate as described in claim 1, which is characterized in that the reading more
For card device equipment in the communication process with smart card, smart card calls corresponding industry card in file by application identifier AID
Book, to carry out network verification in block chain.
8. applying card reading system based on block chain PKI certificate as described in claim 1, which is characterized in that the reading more
Also there is contactless transmission chip, the ESAM chip has SPI interface and two USART interfaces, described in card device equipment
Contactless transmission integrated chip 14443 interface of ISO/IEC and SPI interface, the SPI of the SPI interface and the ESAM chip
Interface communication, 14443 interface of ISO/IEC are interacted with contact type intelligent card；Two USART of the ESAM chip connect
Mouth mold intends two 7816 interfaces of ISO/IEC, for interacting with contact intelligent card.
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| CN107180350A (en) * | 2017-03-31 | 2017-09-19 | 唐晓领 | A kind of method of the multi-party shared transaction metadata based on block chain, apparatus and system |
| CN107273760A (en) * | 2017-06-09 | 2017-10-20 | 济南浪潮高新科技投资发展有限公司 | One kind is based on many CA application authentication methods of block chain |
| CN109635165A (en) * | 2018-12-06 | 2019-04-16 | 北京磁云数字科技有限公司 | Data summarization method, device, equipment and medium based on tree-like block chain network |
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2019
- 2019-06-25 CN CN201910555579.0A patent/CN110276221B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107180350A (en) * | 2017-03-31 | 2017-09-19 | 唐晓领 | A kind of method of the multi-party shared transaction metadata based on block chain, apparatus and system |
| CN107273760A (en) * | 2017-06-09 | 2017-10-20 | 济南浪潮高新科技投资发展有限公司 | One kind is based on many CA application authentication methods of block chain |
| CN109635165A (en) * | 2018-12-06 | 2019-04-16 | 北京磁云数字科技有限公司 | Data summarization method, device, equipment and medium based on tree-like block chain network |
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