CN107103252A - Data access control method based on block chain - Google Patents
Data access control method based on block chain Download PDFInfo
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- CN107103252A CN107103252A CN201710287859.9A CN201710287859A CN107103252A CN 107103252 A CN107103252 A CN 107103252A CN 201710287859 A CN201710287859 A CN 201710287859A CN 107103252 A CN107103252 A CN 107103252A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—Protecting data
- G06F21/62—Protecting access to data via a platform, e.g. using keys or access control rules
- G06F21/6218—Protecting access to data via a platform, e.g. using keys or access control rules to a system of files or objects, e.g. local or distributed file system or database
- G06F21/6227—Protecting access to data via a platform, e.g. using keys or access control rules to a system of files or objects, e.g. local or distributed file system or database where protection concerns the structure of data, e.g. records, types, queries
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/20—Information retrieval; Database structures therefor; File system structures therefor of structured data, e.g. relational data
- G06F16/22—Indexing; Data structures therefor; Storage structures
- G06F16/2228—Indexing structures
- G06F16/2255—Hash tables
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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
- H04L63/06—Network architectures or network communication protocols for network security for supporting key management in a packet data network
- H04L63/061—Network architectures or network communication protocols for network security for supporting key management in a packet data network for key exchange, e.g. in peer-to-peer networks
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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
- H04L63/10—Network architectures or network communication protocols for network security for controlling access to devices or network resources
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Abstract
The present invention discloses the data access control method based on block chain, it is related to block chain data management and control technical field, solves prior art due to the technical problem such as data access controllability is poor caused by control authority design limitations and block data storage organization and block is huge.Can only be by user and proxy access the invention mainly comprises the data of all users, any third party, which desires access to user data, to send request by agency, carried out with the identity of agency；The access log of all customer data can only be accessed by agency and user, and any third party, which desires access to daily record, to send request by agency, carried out with the identity of agency.The present invention is used to design the shared and access control system of data under big data environment.
Description
Technical field
The present invention relates to block chain data management and control technical field, and in particular to the data access controlling party based on block chain
Method.
Background technology
The big data epoch propose higher requirement to data sharing and data safety, or because shared under traditional mode
And substantially without what subsidiary safeguard measure, or data pipe is obtained too tight and limited shared.In addition, the block of prior art
There is redundancy in chain data.
The content of the invention
For above-mentioned prior art, present invention aims at the data access control method based on block chain is provided, solve
Prior art due to caused by control authority design limitations and block data storage organization data access controllability it is poor and
The technical problem such as block is huge.
To reach above-mentioned purpose, the technical solution adopted by the present invention is as follows：
User data access control method based on block chain, including
In block chain after log-on message processing, the restrictive condition of each user data access request is set to be used only to receive
Family access request itself or meet user set authority proxy access request, while set third party user (mechanism or other
User) user data access request is only sent by agency and user data access is only carried out with agent identity.
In the above method, log-on message processing comprises the following steps in the block chain：
Step 1, user and third party user generate the public key, private key, shared key of user after block chain succeeds in registration
With predefined list of access rights and generate third party user public key, private key, shared key and predefined list of access rights,
Public key, private key, shared key and the predefined list of access rights of agency is also generated simultaneously, and then user is corresponding with agency exchanges
Respective public key and shared key, third party user's respective public key of interaction corresponding with agency and shared key；
Step 2, the public key and predefined list of access rights that combine agency, user and third party user by agency are counted
Calculate, obtain third party's client public key, client public key and the cryptographic Hash for acting on behalf of public key, then
Using client public key and act on behalf of public key order take after cryptographic Hash as order comprising client public key, act on behalf of public key, user
First index of predefined list of access rights and the first storage tuple of the first pointer,
Public key will be acted on behalf of and client public key order takes to include as order after cryptographic Hash and acts on behalf of public key, client public key, agency
Second index of predefined list of access rights and the second storage tuple of the second pointer,
Third party's client public key is taken after cryptographic Hash as sequentially comprising third party's client public key, generation with public key order is acted on behalf of
The 3rd index that public key, third party user predefine list of access rights and the 3rd storage tuple of the 3rd pointer is managed,
Meanwhile, it will act on behalf of public key and third party's client public key order taken after cryptographic Hash as order comprising acting on behalf of public key, the
4th index of the 4th storage tuple of tripartite's client public key, the predefined list of access rights of agency and the 4th pointer；
Step 3, initiation information storage request are to pond is asked, when the common recognition of number of thresholds is reached common understanding with processing node
All storage tuples and its manipulative indexing are stored into block chain.
In the above method, in addition to user by meet user set authority agency carry out shared data, it include with
Lower step：
Data are encrypted and enclose set user by step 1, user using the shared key of user predefines access right
Encryption data is obtained after limiting list, signature, encryption data is sent to agency；
Step 2, agency are checked after user identity success, are generated encryption data sharing request according to the first index and will be encrypted
Data sharing request is sent to request pond；
Step 3, by knowing together with processing node find out the first storage tuple that block chain stored, then root by the first index
First kind ballot common recognition checking is carried out according to the log-on message of user and agency, is reached in common recognition and the processing node of number of thresholds
During common recognition, encryption data is stored to the distributed hashtable network under block chain, then updates the predefined access of user in step 1
Permissions list, and the pointer of encryption data is pointed in storage simultaneously.
In the above method, the third party user carries out user data access with agent identity, comprises the following steps：
Step 1, the signed data that third party user is write by acting on behalf of in the access request of user data and predefined visit
Permissions list is asked, and is ended up with the signed data of agency, then access request is sent to request pond；
Step 2, by knowing together with processing node find out the first storage tuple that block chain stored, then root by the first index
Equations of The Second Kind ballot common recognition checking is carried out according to the log-on message of user and agency, is reached in common recognition and the processing node of number of thresholds
During common recognition, the encryption data for being stored in distributed hashtable network under block chain is returned to agency；
Step 3, by acting on behalf of encryption data is decrypted by user's shared key, it is then close using third party's users to share
Key is re-encrypted to the data after decryption, sends re-encrypting data to third party user after signature.
In the above method, the pointer of the encryption data is pointed under block chain to point to the cryptographic Hash of user encryption data
A key-value pair in distributed hashtable network.
Log access control method based on block chain, including
In block chain after log-on message processing, the restrictive condition for setting each user data access log access request is
Receiving Agent access log access request meets the user access logses access request that agency sets authority, while setting the
Tripartite user's (block chain storing mechanism) only sends the access request of user data access log and only to act on behalf of body by agency
Part carries out the access of user data access log.
In the above method, log-on message processing comprises the following steps in the block chain：
Step 1, user and third party user generate the public key, private key, shared key of user after block chain succeeds in registration
With predefined list of access rights and generate third party user public key, private key, shared key and predefined list of access rights,
Public key, private key, shared key and the predefined list of access rights of agency is also generated simultaneously, and then user is corresponding with agency exchanges
Respective public key and shared key, third party user's respective public key of interaction corresponding with agency and shared key；
Step 2, the public key and predefined list of access rights that combine agency, user and third party user by agency are counted
Calculate, obtain third party's client public key, client public key and the cryptographic Hash for acting on behalf of public key, then
Using client public key and act on behalf of public key order take after cryptographic Hash as order comprising client public key, act on behalf of public key, user
First index of predefined list of access rights and the first storage tuple of the first pointer,
Public key will be acted on behalf of and client public key order takes to include as order after cryptographic Hash and acts on behalf of public key, client public key, agency
Second index of predefined list of access rights and the second storage tuple of the second pointer,
Third party's client public key is taken after cryptographic Hash as sequentially comprising third party's client public key, generation with public key order is acted on behalf of
The 3rd index that public key, third party user predefine list of access rights and the 3rd storage tuple of the 3rd pointer is managed,
Meanwhile, it will act on behalf of public key and third party's client public key order taken after cryptographic Hash as order comprising acting on behalf of public key, the
4th index of the 4th storage tuple of tripartite's client public key, the predefined list of access rights of agency and the 4th pointer；
Step 3, initiation information storage request are to pond is asked, when the common recognition of number of thresholds is reached common understanding with processing node
All storage tuples and its manipulative indexing are stored into block chain.
In the above method, the third party user is conducted interviews by acting on behalf of to access log, is comprised the following steps：
Step 1, by act on behalf of access log is encrypted by agent shared secret key, predefined access rights row are acted on behalf of in affix
Table obtains encrypted access daily record and generates access log access request and access access log again with the allograph end of data
Request is sent to request pond；
Step 2, by knowing together with processing node find out the second storage tuple that block chain stored, then root by the second index
The ballot common recognition checking of the 3rd class is carried out according to the log-on message of agency and user, is reached in common recognition and the processing node of number of thresholds
During common recognition, encrypted access daily record is stored to the distributed hashtable network under block chain, then updates agency in step 1 and is predefined
List of access rights, and the pointer of encrypted access daily record is pointed in storage simultaneously.
In the above method, in addition to user is conducted interviews by acting on behalf of to access log, and it comprises the following steps：
Step 1, by act on behalf of in the access request of access log write user predefine list of access rights, and with act on behalf of
Signed data ending, then by access request be sent to request pond；
Step 2, by knowing together with processing node find out the second storage tuple that block chain stored, then root by the second index
The ballot common recognition checking of the 4th class is carried out according to the log-on message of agency and user, is reached in common recognition and the processing node of number of thresholds
During common recognition, the encrypted access daily record for being stored in distributed hashtable network under block chain is returned to agency；
Step 3, by acting on behalf of encrypted access daily record is returned into user.
In such scheme, in addition to user's change data access authority, it comprises the following steps：
Step 1, by acting on behalf of user is write in the access request of access log re-defined list of access rights, and with generation
The signed data ending of reason, then access request is sent to request pond；
Step 2, by knowing together with processing node find out the first storage tuple that block chain stored, then root by the first index
The ballot common recognition checking of the 5th class is carried out according to the log-on message of user and agency, is reached in common recognition and the processing node of number of thresholds
During common recognition, predefined list of access rights is updated to re-define after list of access rights and is stored in block chain.
In the above method, the pointer of the encrypted access daily record points to point to the cryptographic Hash of user encryption access log
A key-value pair under block chain in distributed hashtable network.
Compared with prior art, beneficial effects of the present invention：
By by access control right and point to access log pointer record on block chain so that the owner of data
Itself can not only control access of its other party to data, and whom, which is followed the trail of, can also change the access right of data at any time using data
Limit；
The present invention accesses recording of encrypted storage to the distributed hashtable storage facility under chain also by data and to data
In, only record points to the pointer of the encryption data within a block, and the size of block and raising efficiency in block chain are reduced to reach
Purpose.
Brief description of the drawings
Fig. 1 is module diagram of the invention.
Embodiment
All features disclosed in this specification, or disclosed all methods or during the step of, except mutually exclusive
Feature and/or step beyond, can combine in any way.
The present invention will be further described below in conjunction with the accompanying drawings：
, it is necessary to be stored in block chain needed for for accessing user data in data access control method based on block chain
Permissions list, in addition it is also necessary to store the permissions list for accessing user data daily record.During users to share data, by verify with
Afterwards, access rights, the pointer record of sensing user data to the block chain public key of user, the public key of agency, user set
In, as the checking foundation and index during its other party access user data, and user data will encrypt the distribution being stored under chain
In formula Hash table.When its other party such as mechanism accesses user data, it is necessary to send request by agency, agency first solves after obtaining data
Close re-encrypt is sent to the mechanism.Agency also needs to the record records such as mechanism name, time, the operation of execution that will specifically access and existed
In daily record, by the public key of accessed user, agency public key, agency set access rights, point to access log pointer with
And the time recorded in block chain, as the checking foundation and index during access log, and log recording is also encrypted storage and arrived
In distributed hashtable under chain.
Based on the data access control method of block chain, the data of all users can only be by user and proxy access (agency
Need to meet the authority that user is set), any third party, which desires access to user data, to send request by agency, to act on behalf of
Identity carry out；
The access log of all customer data can only access (the power of user's needs satisfaction agency's setting by acting on behalf of with user
Limit), any third party, which desires access to daily record, to send request by agency, carried out with the identity of agency；
It is used for the index for storing the information of checking and control on block chain by the public key of user, the public key of agency and other members
Hash operation generation is done in data aggregate；
The checking stored on block chain and the information of control include but is not limited to (public key of user, the public key of agency, user
The access rights of setting, point to user data pointer) tuple and (public key of accessed user, the public key of agency, agency are set
Access rights, point to access log pointer) tuple；
Pointer is points to the cryptographic Hash of encryption user data or encrypted logs data, and it is pointed under chain in distributed hashtable
A key-value pair；
The data stored in distributed hashtable, including user data and access log, are specially to be encrypted through shared key
And user data by user's signature or encrypted and by the access log of allograph through shared key.
Embodiment 1
1. user's registration.After user registration success, generate public key PUKu, private key PRKu, shared key SKu and predefine
List of access rights Alu；Agency's generation generation public key PUKa, private key PRKa, shared key SKa and predefined list of access rights
Ala；After other mechanisms or user registration success, generation public key PUKo, private key PRKo, shared key SKo and predefined access
Permissions list ALo.User exchanges public key and shared key with agency；Mechanism exchanges public key and shared key with agency.
2. common recognition and processing node processing user's registration information.Agency believes according to information PUKa, the Ala user's registration of oneself
PUKu, Alu are ceased, institute registration information PUKo, Alo is calculated,
By (PUKu, PUKa) take after cryptographic Hash as storage tuple (PUKu, PUKa, ALu, Pu) index Iu (P represent plus
The cryptographic Hash of close rear user data, is now sky)；
(PUKa, PUKu) is taken into the index Ia after cryptographic Hash as storage tuple (PUKa, PUKu, ALa, Pa)；
(PUKo, PUKa) is taken into the index Io after cryptographic Hash as storage tuple (PUKo, PUKa, ALo, Po)；
(PUKa, PUKo) is taken into the index Ia after cryptographic Hash as storage tuple (PUKa, PUKo, ALa, Pa).Then will
Storage request is sent in request pond, is stored information into after the common recognition node for having 3 and the above is reached common understanding in block.
3. users to share data.User is encrypted data using shared key SKu and after affix list of access rights alu
Signature is sent to agency, after agency's verification user identity success, is sent to according to index Iu generation requests in request pond.Common recognition and place
Manage node and block chain storage tuple (PUKu, PUKa, ALu, Pu) is searched according to index Iu, and it is whether identical according to PKUu, PKUa
Voted, after the common recognition node for having 3 and the above reaches agreement common recognition, by encryption data storage to DHT networks D under chain
(Pu) place, within a block update list of access rights alu and store point to the encryption data pointer Pu (Pu be also encryption after use
The cryptographic Hash of user data).
4. mechanism or other users access data.Agent on behalf mechanism requests data, agency includes mechanism in the request
The digital signature of oneself is acted on behalf of in signed data, the access rights Alo of mechanism application, end affix, and transmit the request to please
Common recognition in pond is asked to search the tuple (PUKu, PUKa, ALu, Pu) that block chain is stored, and foundation according to index Iu with processing node
Whether PKUu, PKUa are identical and whether Alo belongs to ALu and voted, and reach in the common recognition for having 3 and the above with processing node
Agree to after common recognition, then the encryption data D (Pu) being stored in DHT networks is returned to agency.Data are used shared key by agency
SKu is decrypted, and is then reused shared key SKo and is encrypted and beam back mechanism after signing.
5. block chain storing mechanism accesses record.Agency is encrypted record is accessed using shared key SKa, is added agency and is set
The list of access rights Ala put, end, which is added, to be sent to after the digital signature of oneself in request pond.Common recognition and processing node foundation
The tuple (PUKa, PUKu, ALa, Pa) of block chain storage is searched according to index Ia, is voted according to whether PUKa, PUKu are identical,
After the common recognition for having 3 and the above reaches agreement common recognition with processing node, by DHT networks D under encrypted access record storage to chain
(Pl) place update within a block list of access rights Ala and point to the encrypted logs pointer Pl (Pl be also encryption after daily record
Cryptographic Hash).
6. the use of usertracking data.Agent on behalf user sends request, the access rights Alu applied comprising user,
And be sent to after end is plus the digital signature of oneself in request pond.Common recognition, according to Ia is indexed in request, is looked into processing node
The tuple (PUKa, PUKu, ALa, Pa) for looking for block chain to store, and it is whether identical and whether Alu belongs to according to PKUa, PKUu
ALa is voted, after the common recognition that has 3 and the above reaches agreement common recognition with processing node, then is stored in DHT to acting on behalf of return
Encrypted logs D (Pl) in network.Encrypted logs are then returned to user by agency.
7. user changes data access authority.Agent on behalf user sends request, includes the access rights to be changed of user
Alu, and be sent to after end is plus the digital signature of oneself in request pond.Common recognition is with processing node according to indexing Iu in request
Search the tuple (PUKu, PUKa, ALu, Pu) of block chain storage, and voted according to whether PKUu, PKUa are identical, there is 3
Individual and the above common recognition node is reached after agreement common recognition, and new Alu is deposited into block.
8. the coded communication between block chain and distributed hashtable storage facility under chain can mix using public private key systems,
Symmetric key system is realized.
9. the agency in figure is a logic entity, it can be present in distributed on network, to be further ensured that data
Safety, the realization of its service provided is based on multi-party computations technology.
The foregoing is only a specific embodiment of the invention, but protection scope of the present invention is not limited thereto, any
Belong to those skilled in the art the invention discloses technical scope in, the change or replacement that can be readily occurred in, all should
It is included within the scope of the present invention.
Claims (10)
1. the user data access control method based on block chain, it is characterised in that including
In block chain after log-on message processing, set the restrictive condition of each user data access request only to receive user's sheet
Body access request meets the proxy access request that user sets authority, while setting third party user to send use by agency
User data access request and only with agent identity carry out user data access.
2. the user data access control method according to claim 1 based on block chain, it is characterised in that the block
Log-on message processing comprises the following steps in chain：
Step 1, user and third party user generate the public key of user, private key, shared key and pre- after block chain succeeds in registration
Define list of access rights and generate public key, private key, shared key and the predefined list of access rights of third party user, simultaneously
Public key, private key, shared key and the predefined list of access rights of agency is also generated, then user is corresponding with agency exchanges respective
Public key and shared key, third party the user respective public key of interaction corresponding with agency and shared key；
Step 2, the public key and predefined list of access rights that combine agency, user and third party user by agency are calculated,
Third party's client public key, client public key and the cryptographic Hash for acting on behalf of public key are obtained, then
Using client public key and act on behalf of public key order and take after cryptographic Hash as order comprising client public key, act on behalf of public key, user and make a reservation for
First index of adopted list of access rights and the first storage tuple of the first pointer,
Public key will be acted on behalf of and client public key order takes to include as order after cryptographic Hash and acts on behalf of public key, client public key, acts on behalf of predetermined
Second index of adopted list of access rights and the second storage tuple of the second pointer,
Third party's client public key is taken after cryptographic Hash as sequentially comprising third party's client public key, Dai Ligong with public key order is acted on behalf of
Key, third party user predefine the 3rd index of list of access rights and the 3rd storage tuple of the 3rd pointer,
Meanwhile, public key will be acted on behalf of and third party's client public key order takes to include as order after cryptographic Hash and acts on behalf of public key, third party
4th index of the 4th storage tuple of client public key, the predefined list of access rights of agency and the 4th pointer；
Step 3, initiation information storage request are to pond is asked, when the common recognition of number of thresholds is reached common understanding with processing node by institute
There are storage tuple and its manipulative indexing to store into block chain.
3. the user data access control method according to claim 2 based on block chain, it is characterised in that also including use
Family sets the agency of authority to carry out shared data by meeting user, and it comprises the following steps：
Data are encrypted and enclose set user by step 1, user using the shared key of user predefines access rights row
Encryption data is obtained after table, signature, encryption data is sent to agency；
After step 2, agency's verification user identity success, encryption data sharing request is generated and by encryption data according to the first index
Sharing request is sent to request pond；
Step 3, by knowing together with processing node find out the first storage tuple that block chain stored by the first index, further according to
The log-on message of family and agency carry out first kind ballot common recognition checking, reach common understanding in common recognition and the processing node of number of thresholds
When, encryption data is stored to the distributed hashtable network under block chain, then update the predefined access rights of user in step 1
List, and the pointer of encryption data is pointed in storage simultaneously.
4. the user data access control method according to claim 3 based on block chain, it is characterised in that the described 3rd
Square user carries out user data access with agent identity, comprises the following steps：
Step 1, signed data and predefined access right by acting on behalf of the write-in third party user in the access request of user data
List is limited, and is ended up with the signed data of agency, then access request is sent to request pond；
Step 2, by knowing together with processing node find out the first storage tuple that block chain stored by the first index, further according to
The log-on message of family and agency carry out Equations of The Second Kind ballot common recognition checking, reach common understanding in common recognition and the processing node of number of thresholds
When, the encryption data for being stored in distributed hashtable network under block chain is returned to agency；
Step 3, by acting on behalf of encryption data is decrypted by user's shared key, then utilize third party's users to share key pair
Data after decryption are re-encrypted, and send re-encrypting data to third party user after signature.
5. the user data access control method based on block chain according to claim 3 or 4, it is characterised in that described
The pointer of encryption data points to one under block chain in distributed hashtable network to point to the cryptographic Hash of user encryption data
Key-value pair.
6. the log access control method based on block chain, it is characterised in that including
In block chain after log-on message processing, set the restrictive condition of each user data access log access request only to connect
Receive the request of proxy access log access or meet the user access logses access request that agency sets authority, while setting third party
User only sends the access request of user data access log and only carry out user data with agent identity by agency accesses day
The access of will.
7. the log access control method according to claim 6 based on block chain, it is characterised in that in the block chain
Log-on message processing comprises the following steps：
Step 1, user and third party user generate the public key of user, private key, shared key and pre- after block chain succeeds in registration
Define list of access rights and generate public key, private key, shared key and the predefined list of access rights of third party user, simultaneously
Public key, private key, shared key and the predefined list of access rights of agency is also generated, then user is corresponding with agency exchanges respective
Public key and shared key, third party the user respective public key of interaction corresponding with agency and shared key；
Step 2, the public key and predefined list of access rights that combine agency, user and third party user by agency are calculated,
Third party's client public key, client public key and the cryptographic Hash for acting on behalf of public key are obtained, then
Using client public key and act on behalf of public key order and take after cryptographic Hash as order comprising client public key, act on behalf of public key, user and make a reservation for
First index of adopted list of access rights and the first storage tuple of the first pointer,
Public key will be acted on behalf of and client public key order takes to include as order after cryptographic Hash and acts on behalf of public key, client public key, acts on behalf of predetermined
Second index of adopted list of access rights and the second storage tuple of the second pointer,
Third party's client public key is taken after cryptographic Hash as sequentially comprising third party's client public key, Dai Ligong with public key order is acted on behalf of
Key, third party user predefine the 3rd index of list of access rights and the 3rd storage tuple of the 3rd pointer,
Meanwhile, public key will be acted on behalf of and third party's client public key order takes to include as order after cryptographic Hash and acts on behalf of public key, third party
4th index of the 4th storage tuple of client public key, the predefined list of access rights of agency and the 4th pointer；
Step 3, initiation information storage request are to pond is asked, when the common recognition of number of thresholds is reached common understanding with processing node by institute
There are storage tuple and its manipulative indexing to store into block chain.
8. the log access control method according to claim 7 based on block chain, it is characterised in that the third party uses
Family is conducted interviews by acting on behalf of to access log, is comprised the following steps：
Step 1, by act on behalf of access log is encrypted by agent shared secret key, affix acts on behalf of predefined list of access rights again
With the allograph end of data, obtain encrypted access daily record and generate access log access request and by access log access request
Send to request pond；
Step 2, by knowing together with processing node the second storage tuple that block chain stored is found out by the second index, further according to generation
The log-on message of reason and user carry out the ballot common recognition checking of the 3rd class, reach common understanding in common recognition and the processing node of number of thresholds
When, encrypted access daily record is stored to the distributed hashtable network under block chain, then update the predefined access of agency in step 1
Permissions list, and the pointer of encrypted access daily record is pointed in storage simultaneously.
9. the log access control method according to claim 8 based on block chain, it is characterised in that also logical including user
Cross agency to conduct interviews to access log, it comprises the following steps：
Step 1, by acting on behalf of user is write in the access request of access log predefined list of access rights, and with the label of agency
The name end of data, then access request is sent to request pond；
Step 2, by knowing together with processing node the second storage tuple that block chain stored is found out by the second index, further according to generation
The log-on message of reason and user carry out the ballot common recognition checking of the 4th class, reach common understanding in common recognition and the processing node of number of thresholds
When, the encrypted access daily record for being stored in distributed hashtable network under block chain is returned to agency；
Step 3, by acting on behalf of encrypted access daily record is returned into user.
10. the log access control method based on block chain according to claim 8 or claim 9, it is characterised in that the encryption
The pointer of access log is pointed under block chain in distributed hashtable network to point to the cryptographic Hash of user encryption access log
One key-value pair.
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| CN112788107A (en) * | 2020-12-29 | 2021-05-11 | 长威信息科技发展股份有限公司 | Method and system for secure multi-party computing and data sharing |
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