CN109286616B - Permission verification method and device based on block chain technology - Google Patents
Permission verification method and device based on block chain technology Download PDFInfo
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- CN109286616B CN109286616B CN201811053590.9A CN201811053590A CN109286616B CN 109286616 B CN109286616 B CN 109286616B CN 201811053590 A CN201811053590 A CN 201811053590A CN 109286616 B CN109286616 B CN 109286616B
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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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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
- H04L9/3247—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials involving digital signatures
Abstract
The embodiment of the application provides a block chain technology-based permission verification method, which is applied to a first terminal device and comprises the following steps: obtaining a real estate database including a plurality of real estate information according to the plurality of real estate information; adding read-write permission belonging to each terminal device in a plurality of terminal devices one by one for the real estate information in the real estate database; wherein the plurality of terminal devices includes the first terminal device; storing the real estate database in a plurality of terminal devices serving as blockchain nodes in a blockchain manner; when a content modification request is received, a signature authority check is performed. By taking the block chain technology as application and adding authority management, the real estate information management with low cost, safety and rigor is effectively realized.
Description
Technical Field
The application relates to the technical field of data processing and communication, in particular to a permission verification method and device based on a block chain technology.
Background
At present, for the management of real estate information, because there are independent data management of a plurality of departments, and simultaneously, because the content that real estate centers, tax authorities and real estate authorities can supervise real estate is different, a stable and efficient unified management mode with accurate authority division is lacked for the real estate data management among different departments in the whole country.
Disclosure of Invention
The application aims to provide a block chain technology-based permission verification method and device so as to effectively realize efficient and accurate management of real estate information.
In order to achieve the above object, embodiments of the present application are implemented as follows:
in a first aspect, an embodiment of the present application provides a method for checking an authority based on a block chain technology, which is applied to a first terminal device, and includes: obtaining a real estate database including a plurality of real estate information according to the plurality of real estate information; adding read-write permission belonging to each terminal device in a plurality of terminal devices one by one for the real estate information in the real estate database; wherein the plurality of terminal devices includes the first terminal device; storing the real estate database in a plurality of terminal devices serving as blockchain nodes in a blockchain manner; when a content modification request is received, signature authority verification is performed.
In some optional implementations of the first aspect, the method for checking a right based on a blockchain technique, where performing a signature right verification when a content modification request is received includes: confirming the terminal equipment initiating the content modification request according to at least one sender signature in the content modification request; wherein the number of terminal devices initiating the content modification request is not more than the number of the sender signatures; matching the terminal equipment initiating the content modification request with the read-write permission of the first real estate information related to the content modification request to obtain a matching result; and if the matching result is yes, the signature authority passes the verification.
In some optional implementation manners of the first aspect, in the block chain technology-based permission verification method, the confirming, according to at least one sender signature in the content modification request, a terminal device that initiated the content modification request includes: for a second sender signature in the at least one sender signature, decrypting the signature by using a public key corresponding to the second sender signature to obtain a modified content digest; matching the modified content abstract with modified content in the content modification request; and if the modified content abstract is matched with the content modification request, determining that the second terminal equipment corresponding to the second sender signature is the terminal equipment initiating the content modification request.
In some optional implementation manners of the first aspect, in the method for checking permissions based on a blockchain technique, the matching, by the terminal device initiating the content modification request, read-write permissions of the first real estate information related to the content modification request includes: calculating the authority level value of the sum of the terminal devices which initiate the content modification request; and if the sum of the authority level values is not less than the authority threshold value of the read-write authority of the first real estate information, judging that the terminal equipment initiating the content modification request is matched with the read-write authority of the first real estate information related to the content modification request.
In some optional implementation manners of the first aspect, in the method for checking permissions based on a blockchain technique, if the signed permission passes verification, the method for checking permissions according to the content modification request correspondingly modifies the plurality of real estate information stored in the real estate data on the first terminal device, and then further includes: broadcasting the content modification request to a communication network in which the plurality of terminal devices are located.
In a second aspect, an embodiment of the present application provides an authority checking apparatus based on a block chain technology, which is applied to a first terminal device, and includes: the device comprises a first obtaining module, an adding module, a storage module, a verification module and a modification module; the first obtaining module is configured to obtain a real estate database including a plurality of real estate information according to the plurality of real estate information; the adding module is used for adding the read-write permission belonging to each terminal device in a plurality of terminal devices for the real estate information one by one in the real estate database; wherein the plurality of terminal devices includes the first terminal device; the storage module is used for storing the real estate database in a block chain form in a plurality of terminal devices serving as block chain nodes; the verification module is used for verifying the signature authority when a content modification request is received; the modification module is configured to modify the plurality of real estate information stored in the real estate data on the first terminal device according to the content modification request after the signature permission verification passes.
In some optional implementations of the second aspect, the block chain technology-based right checking apparatus includes: a confirming unit, a matching unit and a passing unit; the confirming unit is used for confirming the terminal equipment initiating the content modification request according to at least one sender signature in the content modification request; wherein the number of terminal devices initiating the content modification request is not more than the number of the sender signatures; the matching unit is used for matching the terminal equipment initiating the content modification request with the read-write permission of the first real estate information related to the content modification request to obtain a matching result; and the passing unit is used for passing the signature authority verification if the matching result is yes.
In some optional implementations of the second aspect, the block chain technology-based right checking apparatus includes: the device comprises a decryption subunit, an abstract matching subunit and a determination subunit; the decryption subunit is configured to decrypt, for a second sender signature in the at least one sender signature, the signature with a public key corresponding to the second sender signature, to obtain a modified content digest; the abstract matching subunit is used for matching the abstract of the modified content with the modified content in the content modification request; and the determining subunit is configured to determine, if the modified content digest is matched with the content modification request, that the second terminal device corresponding to the second sender signature is a terminal device that initiated the content modification request.
In some optional implementations of the second aspect, the block chain technology-based right checking apparatus includes: a calculation subunit and a permission matching subunit; the calculating subunit is configured to calculate an authority level value of a sum of terminal devices that initiated the content modification request; and the permission matching subunit is configured to determine that the terminal device initiating the content modification request matches the read-write permission of the first real estate information related to the content modification request if the total permission level value is not less than the permission threshold of the read-write permission of the first real estate information.
In some optional implementation manners of the second aspect, the block chain technology-based right checking apparatus further includes: a broadcast module; the broadcasting module is configured to broadcast the content modification request to a communication network in which the plurality of terminal devices are located.
The beneficial effects of the embodiment of the application include:
the embodiment of the application provides a block chain technology-based permission verification method, which is applied to a first terminal device and comprises the following steps: obtaining a real estate database including a plurality of real estate information according to the plurality of real estate information; adding read-write permission belonging to each terminal device in a plurality of terminal devices one by one for the real estate information in the real estate database; wherein the plurality of terminal devices includes the first terminal device; storing the real estate database in a plurality of terminal devices serving as blockchain nodes in a blockchain manner; when a content modification request is received, signature authority verification is performed.
By taking the block chain technology as application and adding authority management, the real estate information management with low cost, safety and rigor is effectively realized.
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 shows a block diagram of a first terminal device according to a first embodiment of the present application;
fig. 2 is a flowchart illustrating a method for checking permissions based on a blockchain technique according to a second embodiment of the present application;
fig. 3 is a block diagram illustrating a block chain technology-based rights checking apparatus according to a third embodiment of the present application;
fig. 4 is a block diagram illustrating an authentication module of a block chain technology-based rights checking device according to a third embodiment of the present application;
fig. 5 is a block diagram illustrating a validation unit of an authentication module of a block chain technology-based rights checking device according to a third embodiment of the present application;
fig. 6 is a block diagram illustrating a matching unit of an authentication module of a block chain technology-based rights checking device according to a third embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present application without inventive step, are within the scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. The terms "first," "second," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. Further, the term "and/or" in the present application is only one kind of association relationship describing the associated object, and means that three kinds of relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone.
First embodiment
Referring to fig. 1, a first embodiment of the present application provides a first terminal device 10.
The first terminal device 10 includes: the system comprises a memory 11, a memory controller 12, a processor 13, a peripheral interface 14 and a block chain technology-based permission verification device 100.
The elements of the memory 11, the memory controller 12, the processor 13 and the peripheral interface 14 are electrically connected to each other directly or indirectly to realize data transmission or interaction. For example, the components may be electrically connected to each other via one or more communication buses or signal lines. The device 100 for checking permissions based on the blockchain technology includes at least one software function module that can be stored in the memory 11 in the form of software or firmware. The processor 13 is used for executing an executable module stored in the memory 12, such as a software functional module or a computer program included in the device 100 for checking the permission based on the blockchain technology.
The Memory 11 may be, but is not limited to, a Random Access Memory (RAM), a Read Only Memory (ROM), a programmable Read-Only Memory (LROM), an Erasable Read-Only Memory (ELROM), an electrically Erasable Read-Only Memory (LROM), and the like. The memory 11 is configured to store a program, and the processor 13 executes the program after receiving an execution instruction, and the method defined by the flow process disclosed in any embodiment of the present application may be applied to the processor 13, or implemented by the processor 13.
The processor 13 may be an integrated circuit chip having signal processing capabilities. The information digest processor 13 may be a general-purpose information digest processor, including a Central information digest processor (CLU), a Network information digest processor (NL); but may also be a digital signal message digest processor (DSL), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FLGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. The general purpose message digest processor may be a micro message digest processor or the message digest processor may be any conventional message digest processor or the like.
The peripheral interface 14 couples various input/output devices to the processor 13 and to the memory 11. In some embodiments, peripheral interface 14, processor 13, and memory controller 12 may be implemented in a single chip. In other examples, they may be implemented separately from the individual chips.
Second embodiment
The present embodiment provides a method for privilege verification based on blockchain techniques, it should be noted that the steps shown in the flowchart of the figure may be performed in a computer system such as a set of computer executable instructions, and that although a logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in an order different from that shown. The present embodiment will be described in detail below.
Referring to fig. 2, in the permission checking method based on the blockchain technique provided in the embodiment, the permission checking method based on the blockchain technique is applied to the first terminal device 10, and the analysis method may include: step S100, step S200, step S300, step S400, and step S500.
Step S100: obtaining a real estate database including a plurality of real estate information according to the plurality of real estate information;
the real estate information is converted into a uniform format to be stored in the database, so that subsequent query and modification are facilitated.
Step S200: adding read-write permission belonging to each terminal device in a plurality of terminal devices one by one for the real estate information in the real estate database; wherein the plurality of terminal devices includes the first terminal device;
each real estate information has a specific read-write permission for the terminal device delayed, for example, the real estate information a allows the terminal device a to modify the basic information, does not allow the terminal device a to modify the core information, and for example, the real estate information a does not allow the terminal device b to modify the basic information and the core information.
Step S300: storing the real estate database in a plurality of terminal devices serving as blockchain nodes in a blockchain manner;
step S400: when a content modification request is received, signature authority verification is carried out;
step S500: and if the signature authority passes the verification, modifying the real estate information stored in the real estate data on the first terminal device according to the content modification request.
In step S400, the method includes: step S410, step S420, and step S430.
Step S410: confirming the terminal equipment initiating the content modification request according to at least one sender signature in the content modification request; wherein the number of terminal devices initiating the content modification request is not more than the number of the sender signatures;
and performing signature verification according to the signature of the sender, and confirming the signature which is legal and is made by the terminal equipment in the plurality of terminal equipment generated in the content modification request, wherein the signature is the terminal equipment which needs to be confirmed finally and initiates the content modification request.
Step S420: matching the terminal equipment initiating the content modification request with the read-write permission of the first real estate information related to the content modification request to obtain a matching result;
step S430: and if the matching result is yes, the signature authority passes the verification.
In step S410, the method includes: step S411, step S412, and step S413.
In step S411, step S412 and step S413, a terrestrial sender signature is defined as an example of the at least one sender signature.
Step S411: for a second sender signature in the at least one sender signature, decrypting the signature by using a public key corresponding to the second sender signature to obtain a modified content digest;
all sender signatures including the second sender signature are obtained by encrypting the modified content digest by the own private key of the corresponding terminal device, and the modified content digest used for generating the signature by encryption is obtained by performing digest algorithm operation on the modified content in the content modification request.
Step S412: matching the modified content abstract with modified content in the content modification request;
for the modified content in the content modification request, in step S412, a digest operation is performed again by using the same digest algorithm for obtaining the digest of the modified content encrypted to generate a signature, so as to obtain digest information, and the digest information is used to match with the modified content digest, that is, to compare, if the digest information is the same as the modified content digest, then the modified content digest matches with the modified content in the content modification request.
Step S413: and if the modified content abstract is matched with the content modification request, determining that the second terminal equipment corresponding to the second sender signature is the terminal equipment initiating the content modification request.
In step S420, the method includes: step S421 and step S422.
Step S421: calculating the authority level value of the sum of the terminal devices which initiate the content modification request;
step S422: and if the sum of the authority level values is not less than the authority threshold value of the read-write authority of the first real estate information, judging that the terminal equipment initiating the content modification request is matched with the read-write authority of the first real estate information related to the content modification request.
In step S420, for the first real estate information that needs to be modified in the content modification request, it needs to be determined whether the terminal device that initiated the content modification request has modification rights for the first real estate information. And each terminal device has a corresponding authority grade value for the first real estate information. For example, if the permission threshold of a certain item of information of the first real estate information is 9, and the number of terminal devices initiating the content modification request is three, the permission levels corresponding to the first real estate information are 3,4, and 5, respectively, and the total permission level value of the permission levels is 12 and not less than the permission threshold of 9, it is determined that the terminal device initiating the content modification request matches the read-write permission of the first real estate information related to the content modification request.
The permission verification method based on the block chain technology further comprises the following steps: and step S500.
Step S500: broadcasting the content modification request to a communication network in which the plurality of terminal devices are located.
Based on the principle of decentralized block chain, the first terminal device broadcasts the modification to other terminal devices after completing the local modification, so as to keep the data of all the terminal devices which are nodes in the network consistent.
Third embodiment
Referring to fig. 3, an embodiment of the present application further provides an authority checking apparatus 100 based on a block chain technique, which is applied to a first terminal device, and includes: a first obtaining module 110, an adding module 120, a storing module 130, a verifying module 140 and a modifying module 150;
the first obtaining module 110 is configured to obtain a real estate database including a plurality of real estate information according to the plurality of real estate information;
the adding module 120 is configured to add, in the real estate database, read-write permissions belonging to each of the plurality of terminal devices for the plurality of real estate information one by one; wherein the plurality of terminal devices includes the first terminal device;
the storage module 130 is configured to store the real estate database in a block chain form in a plurality of terminal devices serving as block chain nodes;
the verification module 140 is configured to perform signature authority verification when a content modification request is received;
the modifying module 150 is configured to modify, according to the content modification request, the plurality of real estate information stored in the real estate data on the first terminal device, where the signature authority passes the verification.
Referring to fig. 4, the verification module 140 includes: a confirmation unit 141, a matching unit 142, and a passing unit 143;
the confirming unit 141 is configured to confirm the terminal device that initiated the content modification request according to at least one sender signature in the content modification request; wherein the number of terminal devices initiating the content modification request is not more than the number of the sender signatures;
the matching unit 142 is configured to match the terminal device that initiates the content modification request with the read-write permission of the first real estate information related to the content modification request, so as to obtain a matching result;
the passing unit 143 is configured to pass the signature authority verification if the matching result is yes.
Referring to fig. 5, the confirmation unit 141 includes: a decryption subunit 1411, a digest matching subunit 1412, and a determination subunit 1413;
the decrypting subunit 1411 is configured to, for a second sender signature among the at least one sender signature, decrypt the signature with a public key corresponding to the second sender signature to obtain a modified content digest;
the digest matching subunit 1412, configured to match the modified content digest with the modified content in the content modification request;
the determining subunit 1413 is configured to determine, if the modified content digest matches the content modification request, that the second terminal device corresponding to the second sender signature is a terminal device initiating the content modification request.
Referring to fig. 6, the matching unit 142 includes: a calculation subunit 1421 and a permission matching subunit 1422;
the computing subunit 1421 is configured to calculate a permission level value of a sum of terminal devices that initiate the content modification request;
the permission matching subunit 1422 is configured to determine that the terminal device initiating the content modification request matches the read-write permission of the first real estate information related to the content modification request, if the permission level value of the sum is not smaller than the permission threshold of the read-write permission of the first real estate information.
The block chain technology-based permission verification apparatus 100 further includes: a broadcast module 150;
the broadcasting module 150 is configured to broadcast the content modification request to a communication network in which the plurality of terminal devices are located.
In summary, the following steps:
the embodiment of the application provides a block chain technology-based permission verification method, which is applied to a first terminal device and comprises the following steps: obtaining a real estate database including a plurality of real estate information according to the plurality of real estate information; adding read-write permission belonging to each terminal device in a plurality of terminal devices one by one for the real estate information in the real estate database; wherein the plurality of terminal devices includes the first terminal device; storing the real estate database in a plurality of terminal devices serving as blockchain nodes in a blockchain manner; when a content modification request is received, a signature authority check is performed.
By taking the block chain technology as application and adding authority management, the real estate information management with low cost, safety and rigor is effectively realized.
The program code product of the concatenated dispatching method provided in the embodiment of the present application includes a computer-readable storage medium storing the program code, and instructions included in the program code may be used to execute the method in the foregoing method embodiment.
It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the system and the apparatus described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present application, and shall be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (6)
1. A permission verification method based on a block chain technology is applied to a first terminal device, and is characterized by comprising the following steps:
obtaining a real estate database including a plurality of real estate information according to the plurality of real estate information;
adding read-write permission belonging to each terminal device in a plurality of terminal devices one by one for the real estate information in the real estate database; wherein the plurality of terminal devices includes the first terminal device;
storing the real estate database in a plurality of terminal devices serving as blockchain nodes in a blockchain manner;
when a content modification request is received, confirming terminal equipment initiating the content modification request according to at least one sender signature in the content modification request; wherein the number of terminal devices initiating the content modification request is not more than the number of the sender signatures;
calculating the authority level value of the sum of the terminal devices which initiate the content modification request;
if the sum of the authority level values is not smaller than the authority threshold value of the read-write authority of the first real estate information related to the content modification request, judging that the terminal equipment initiating the content modification request is matched with the read-write authority of the first real estate information related to the content modification request, and passing the signature authority verification;
and if the signature authority passes the verification, modifying the real estate information stored in the real estate data on the first terminal device according to the content modification request.
2. The method for checking permissions based on blockchain technology of claim 1, wherein the confirming the terminal device that initiated the content modification request according to at least one sender signature in the content modification request comprises:
for a second sender signature in the at least one sender signature, decrypting the signature by using a public key corresponding to the second sender signature to obtain a modified content digest;
matching the modified content abstract with modified content in the content modification request;
and if the modified content abstract is matched with the content modification request, determining that the second terminal equipment corresponding to the second sender signature is the terminal equipment initiating the content modification request.
3. The method of claim 1, wherein if the signed permission is verified, the real estate information in the real estate data stored on the first terminal device is modified according to the content modification request, and then the method further comprises:
broadcasting the content modification request to a communication network in which the plurality of terminal devices are located.
4. A permission verification device based on block chain technology is applied to a first terminal device and is characterized by comprising: the device comprises a first obtaining module, an adding module, a storage module, a verification module and a modification module;
the first obtaining module is configured to obtain a real estate database including a plurality of real estate information according to the plurality of real estate information;
the adding module is used for adding the read-write permission belonging to each terminal device in a plurality of terminal devices for the real estate information one by one in the real estate database; wherein the plurality of terminal devices includes the first terminal device;
the storage module is used for storing the real estate database in a block chain form in a plurality of terminal devices serving as block chain nodes;
the verification module is used for verifying the signature authority when a content modification request is received;
the modification module is configured to modify the plurality of real estate information stored in the real estate data on the first terminal device according to the content modification request after the signature permission verification passes;
the authentication module includes: a confirming unit, a matching unit and a passing unit;
the confirming unit is used for confirming the terminal equipment initiating the content modification request according to at least one sender signature in the content modification request; wherein the number of terminal devices initiating the content modification request is not more than the number of the sender signatures;
the matching unit is used for matching the terminal equipment initiating the content modification request with the read-write permission of the first real estate information related to the content modification request to obtain a matching result;
the passing unit is used for passing the signature authority verification if the matching result is yes;
the matching unit includes: a calculation subunit and a permission matching subunit;
the calculating subunit is configured to calculate an authority level value of a sum of terminal devices that initiated the content modification request;
and the permission matching subunit is configured to determine that the terminal device initiating the content modification request matches the read-write permission of the first real estate information related to the content modification request if the total permission level value is not less than the permission threshold of the read-write permission of the first real estate information.
5. The block chain technology-based right checking device as claimed in claim 4, wherein the confirming unit comprises: the device comprises a decryption subunit, an abstract matching subunit and a determination subunit;
the decryption subunit is configured to decrypt, for a second sender signature in the at least one sender signature, the signature with a public key corresponding to the second sender signature, to obtain a modified content digest;
the abstract matching subunit is used for matching the abstract of the modified content with the modified content in the content modification request;
and the determining subunit is configured to determine, if the modified content digest is matched with the content modification request, that the second terminal device corresponding to the second sender signature is a terminal device that initiated the content modification request.
6. The block chain technology-based right checking device as claimed in claim 4, further comprising: a broadcast module;
the broadcasting module is configured to broadcast the content modification request to a communication network in which the plurality of terminal devices are located.
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