CN114389902B - Block chain-based network security monitoring method and system - Google Patents
Block chain-based network security monitoring method and system Download PDFInfo
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Abstract
The invention discloses a network security monitoring method and system based on a block chain. The method comprises the following steps: receiving a network data access request sent by a blockchain access node, and acquiring network security feature data from the access request; calculating an access security value of a blockchain access node according to the network security feature data; inputting the network security feature data into a pre-constructed node security evaluation model, and outputting a node security evaluation value; and if the access security value is greater than the security evaluation value, allowing access, updating the node security evaluation model by using the network security feature data, and if the access security value is less than the security evaluation value, forbidding access. Each node is maintained with an evaluation model capable of evaluating the security of other nodes, and the evaluation model can be dynamically updated along with the access of other nodes, so that the accuracy of the evaluation model is improved, and the security degree of network monitoring is improved.
Description
Technical Field
The invention relates to the field of block chain data processing, in particular to a network security monitoring method and system based on a block chain.
Background
Blockchains are a term of art in information technology. In essence, the system is a shared database, and the data or information stored in the shared database has the characteristics of 'unforgeability', 'whole-course trace', 'traceability', 'public transparency', 'collective maintenance', and the like. Based on the characteristics, the block chain technology lays a solid 'trust' foundation, creates a reliable 'cooperation' mechanism and has wide application prospect. The network Security (Cyber Security) means that the hardware, software and data in the system of the network system are protected and are not damaged, changed and leaked due to accidental or malicious reasons, the system continuously, reliably and normally operates, and the network service is not interrupted.
In the conventional network security monitoring method for a block chain, security of an access node is generally considered by each receiving node, and if the node is a node already registered in the block chain, the access of the node is directly allowed, so that for a node which maliciously sends an access request, the security in the block chain cannot be guaranteed. The application provides a network security monitoring method and system capable of improving the security of block link points.
Disclosure of Invention
The invention provides a network security monitoring method based on a block chain, which comprises the following steps:
step S110, a block chain receiving node receives a network data access request sent by a block chain access node, and network security feature data are obtained from the access request;
step S120, the block chain receiving node calculates an access security value of the block chain access node according to the network security feature data;
step S130, inputting network security feature data into a pre-constructed node security evaluation model by the block link receiving node, and outputting a node security evaluation value;
and step S140, comparing the access security value with the security evaluation value, if the access security value is greater than the security evaluation value, allowing the access of the blockchain access node, updating the node security evaluation model by using the network security feature data, and if the access security value is less than the security evaluation value, forbidding the access of the blockchain access node.
The method for monitoring network security based on the blockchain comprises the steps that the blockchain is composed of a plurality of blockchain link points, the blockchain link point for sending data is used as a blockchain access node, the blockchain link point for receiving data is used as a blockchain receiving node, the blockchain access node organizes a network data access request, the network data access request is sent to the blockchain receiving node, the blockchain receiving node is used for monitoring network security, and a data access party is allowed or forbidden to access the node.
The network security monitoring method based on the blockchain is characterized in that a data transmission protocol is preset between each blockchain access node and each blockchain receiving node, the data transmission protocol includes network security feature data, and the network security feature data includes a network address, a node attribute, an access service category, frequent access times, and a credit value.
The network security monitoring method based on the block chain as described above, wherein each block chain node may perform data communication with each other, but each block chain node has different limits for other block chain nodes, including different ranges of network addresses allowed to be accessed, different attributes of devices allowed to be accessed, different degrees of openness for access service classes, different security evaluations due to access times, and different permissions allowed to be accessed by different credit values.
The network security monitoring method based on the blockchain comprises the steps of obtaining network security feature data from an access request to form a network security feature data set; acquiring preset weights corresponding to all characteristic requirements in a network security characteristic data set; and calculating an access security value according to the network security feature data and the corresponding preset weight.
The present application further provides a network security monitoring system based on a block chain, including:
the network security characteristic data acquisition module is used for receiving a network data access request sent by the blockchain access node and acquiring network security characteristic data from the access request;
the access security value calculation module is used for calculating the access security value of the access node of the block chain according to the network security feature data;
the node safety evaluation value calculation module is used for inputting the network safety characteristic data into a pre-constructed node safety evaluation model and outputting a node safety evaluation value;
and the comparison module is used for comparing the access security value with the security evaluation value, allowing the access of the blockchain access node if the access security value is greater than the security evaluation value, updating the node security evaluation model by using the network security feature data, and forbidding the access of the blockchain access node if the access security value is less than the security evaluation value.
The network security monitoring system based on the blockchain is characterized in that the blockchain is composed of a plurality of blockchain link points, the blockchain link point for sending data is used as a blockchain access node, the blockchain link point for receiving data is used as a blockchain receiving node, the blockchain access node organizes a network data access request, the network data access request is sent to the blockchain receiving node, and the blockchain receiving node performs network security monitoring to allow or prohibit a data access party to access the node.
The network security monitoring system based on the blockchain is characterized in that a data transmission protocol is preset between each blockchain access node and each blockchain receiving node, the data transmission protocol includes network security feature data, and the network security feature data includes a network address, a node attribute, an access service category, frequent access times, and a credit value.
The network security monitoring system based on the block chain as described above, wherein each block chain node may perform data communication with each other, but each block chain node has different limits for other block chain nodes, including different ranges of network addresses allowed to be accessed, different attributes of devices allowed to be accessed, different degrees of openness for access service classes, different security evaluations due to access times, and different permissions allowed to be accessed by different credit values.
The network security monitoring system based on the block chain as described above, wherein the access security value calculation module specifically includes: acquiring network security feature data from the access request to form a network security feature data set; acquiring preset weights corresponding to all characteristic requirements in a network security characteristic data set; and calculating an access security value according to the network security feature data and the corresponding preset weight.
The invention has the following beneficial effects: by adopting the technical scheme, each node maintains the evaluation model capable of evaluating the security of other nodes, and the evaluation model can be dynamically updated along with the access of other nodes so as to improve the accuracy of the evaluation model, thereby ensuring that the access can be more accurately released or intercepted according to the security of the access request of other nodes when the other nodes have data access, and improving the security degree of network monitoring.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present invention, and other drawings can be obtained by those skilled in the art according to the drawings.
Fig. 1 is a flowchart of a network security monitoring method based on a block chain according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a network security monitoring system based on a block chain according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
As shown in fig. 1, an embodiment of the present invention provides a network security monitoring method based on a block chain, including:
the block chain is composed of a plurality of block chain link points, the block chain link points for sending data are used as block chain access nodes, the block chain link points for receiving data are used as block chain receiving nodes, the block chain access nodes organize network data access requests, the network data access requests are sent to the block chain receiving nodes, the block chain receiving nodes are used for network security monitoring, and data access parties are allowed or forbidden to access the nodes.
A data transmission protocol is preset between each blockchain access node and each blockchain receiving node, the data transmission protocol comprises network security feature data, and the network security feature data comprises but is not limited to network addresses, node attributes, access service types, frequent access times, credit values and the like. Each block chain node can carry out data communication, but each block chain node has different limits for other block chain nodes, for example, the block chain nodes have different ranges of network addresses allowed to be accessed, different attributes of equipment allowed to be accessed, different degrees of openness for accessing service types, different security evaluations brought by access times, different permissions of allowing access for different credit values and the like, and the security evaluation values of the node on other nodes are obtained by comprehensively considering various security factors; for example, block link point a accesses block chain node B and block link point C, the IP address range allowed to be accessed in block link point B is 1.0.0.0 to 126.0.0.0, the IP address range allowed to be accessed by block link point C is 98.0.0.0 to 191.255.255.255, if the IP address of block chain node a is 50.122.31.52, block link point B allows block chain node a access, block chain node C does not allow block chain node a access, and if the IP address of block chain node a is 111.122.31.52, both block link point B and block link point C allow access in terms of IP address, then other influencing factors are comprehensively considered.
specifically, network security feature data are obtained from the access request to form a network security feature data set
Wherein, in the step (A),
for feature elements, n is the number of elements in the set. For example: is a network address,
For node attributes (i.e. the node terminal device attributes),
For accessing traffic classes (i.e. the type of traffic requested by a blockchain access node from a blockchain recipient node),
For the number of frequent accesses (i.e. the number of access requests sent by an access node to a receiving node within a predetermined time range),
Is the node credit value.
Acquiring preset weight corresponding to each characteristic requirement in network security characteristic data set
The preset weight is pre-agreed by the blockchain receiving node and the blockchain access node in advance according to the node attribute and the like, and then the access security value is calculated to be
Wherein, in the step (A),
access security for access nodes to a blockchain
Indicating whether the network address of the requesting node is an illegal network address domain of the access node; if not, then
Is 1, if so, then
Is 0;
for the ith feature element in the network security feature data set,
and the weighted value corresponding to the ith characteristic element is set, the value of i is 1 to n, and n is the total quantity of the characteristic elements of the network security characteristic data set.
and a node security evaluation model suitable for all other block link points to access is constructed in each block link receiving node in advance, the evaluation model is constructed according to historical access data of each access node and is used for evaluating the security of the access node, and the evaluation model can be dynamically updated according to the access data of each access node, so that the security evaluation accuracy of the receiving node on the access node is improved.
Specifically, the node safety evaluation model is constructed by
Wherein, in the process,
the output node safety measurement and evaluation value is obtained;
representing the total number of the service types of the access nodes belonging to the service types of the receiving nodes;
a total number indicating that the service class of the access node does not belong to the service class of the receiving node;
for each sub-data model function,
is a sub data model function weight;
wherein, in the step (A),
for the input layer to hidden layer thresholds in a neural network,
weights for input layers to hidden layers in a neural network,
the weights for the hidden layer to the output layer,
as a function of the input layer to the hidden layer
And b is a neural network correction value.
If the access security of the access node of the block chain is obtained through calculation
If the access node is determined to be safe, the access node is allowed to access the receiving node, and in order to make the node safety evaluation model more accurate, the access node data received this time is output to the node safety evaluation model, so as to improve the model output precision.
If the access security of the access node of the block chain is obtained through calculation
If the access node is a node which is not accessed by the receiving node, the security evaluation value of the receiving node before the access node is higher, but the security of the accessed data is lower, that is, the data is possibly hidden in the security, so that the receiving node rejects the data access and returns a response that the data access is not allowed to the access node.
Example two
As shown in fig. 2, a second embodiment of the present application provides a network security monitoring system 20 based on a block chain, where the block chain is composed of a plurality of block link points, the block link point for sending data is used as a block chain access node, the block link point for receiving data is used as a block chain receiving node, the block chain access node organizes a network data access request, sends the network data access request to the block chain receiving node, and the block chain receiving node performs network security monitoring to allow or prohibit a data access party to access the node. The network security monitoring system 20 specifically includes:
the network security feature data acquisition module 21 is configured to receive a network data access request sent by a blockchain access node, and acquire network security feature data from the access request;
a data transmission protocol is preset between each blockchain access node and each blockchain receiving node, the data transmission protocol comprises network security feature data, and the network security feature data comprises but is not limited to network addresses, node attributes, access service types, frequent access times, credit values and the like. Each block chain node can carry out data communication, but each block chain node has different limits for other block chain nodes, for example, the block chain nodes have different ranges of network addresses allowed to be accessed, different attributes of equipment allowed to be accessed, different degrees of openness for accessing service types, different security evaluations brought by access times, different permissions of allowing access for different credit values and the like, and the security evaluation values of the node on other nodes are obtained by comprehensively considering various security factors; for example, block link point a accesses block chain node B and block link point C, the IP address range allowed to be accessed in block link point B is 1.0.0.0 to 126.0.0.0, the IP address range allowed to be accessed by block link point C is 98.0.0.0 to 191.255.255.255, if the IP address of block chain node a is 50.122.31.52, block link point B allows block chain node a access, block chain node C does not allow block chain node a access, and if the IP address of block chain node a is 111.122.31.52, both block link point B and block link point C allow access in terms of IP address, then other influencing factors are comprehensively considered.
An access security value calculation module 22, configured to calculate an access security value of the blockchain access node according to the network security feature data;
specifically, network security feature data are obtained from the access request to form a network security feature data set
Wherein, in the step (A),
for feature elements, n is the number of elements in the set. For example: is a network address,
For node attributes (i.e. the node terminal device attributes),
For accessing traffic classes (i.e. the type of traffic requested by a blockchain access node from a blockchain recipient node),
For the number of frequent accesses (i.e. the number of access requests sent by an access node to a receiving node within a predetermined time range),
Is the node credit value.
Obtaining preset weight corresponding to each characteristic requirement in network security characteristic data set
The preset weight is pre-agreed by the blockchain receiving node and the blockchain access node in advance according to the node attribute and the like, and then the access security value is calculated to be
Wherein, in the step (A),
for the access security of the blockchain access node,
indicating whether the network address of the requesting node is an illegal network address domain of the access node; if not, then
Is 1, if so, then
Is 0;
for the ith feature element in the network security feature data set,
and the weighted value corresponding to the ith characteristic element is set, the value of i is 1 to n, and n is the total quantity of the characteristic elements of the network security characteristic data set.
The node safety evaluation value calculation module 23 is used for inputting the network safety characteristic data into a node safety evaluation model which is constructed in advance and outputting a node safety evaluation value;
and a node security evaluation model suitable for all other block link points to access is constructed in each block link receiving node in advance, the evaluation model is constructed according to historical access data of each access node and is used for evaluating the security of the access node, and the evaluation model can be dynamically updated according to the access data of each access node, so that the security evaluation accuracy of the receiving node on the access node is improved.
Specifically, the node safety evaluation model is constructed by
Wherein, in the step (A),
the output node safety measurement and evaluation value is obtained;
representing the total number of the service types of the access nodes belonging to the service types of the receiving nodes;
indicating traffic class of access node notTotal number of traffic classes belonging to the receiving node;
for each sub-data model function,
is a sub data model function weight;
wherein, in the process,
for the input layer to hidden layer thresholds in a neural network,
weights for input layers to hidden layers in a neural network,
for the weight of the hidden layer to the output layer,
as a function of the input layer to the hidden layer
And b is a neural network correction value.
And the comparison module 24 is used for comparing the access security value with the security evaluation value, allowing the access of the blockchain access node if the access security value is greater than the security evaluation value, updating the node security evaluation model by using the network security feature data, and forbidding the access of the blockchain access node if the access security value is less than the security evaluation value.
If the access security of the access node of the block chain is obtained through calculation
If the access node is not in the access node, the security level of the data of the access node is higher than the security measurement of the receiving node before the access nodeAnd (4) evaluating, namely, if the data of the access node is determined to be safe data, allowing the access node to access the receiving node, and outputting the data of the access node received this time to the node safety evaluation model to improve the model output precision in order to make the node safety evaluation model more accurate.
If the access security of the access node of the block chain is obtained through calculation
If the access node is a node which is not allowed to access the data, the security evaluation value of the receiving node before the access node is higher, but the security of the access data is lower, that is, the data is possibly potential safety hazard, so that the receiving node refuses the data access and returns a response which does not allow the data access to the access node.
The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made on the basis of the technical solutions of the present invention should be included in the scope of the present invention.
Claims (10)
1. A network security monitoring method based on a block chain is characterized by comprising the following steps:
step S110, a blockchain receiving node receives a network data access request sent by a blockchain access node, and network security feature data are obtained from the access request;
step S120, the block chain receiving node calculates an access security value of the block chain access node according to the network security feature data;
step S130, inputting network security feature data into a pre-constructed node security evaluation model by the block link receiving node, and outputting a node security evaluation value;
step S140, comparing the access security value with the security evaluation value, if the access security value is greater than the security evaluation value, allowing the access of the blockchain access node, updating the node security evaluation model by using the network security feature data, and if the access security value is less than the security evaluation value, forbidding the access of the blockchain access node;
obtaining network security feature data from the access request to form a network security feature data set
Wherein, in the process,
n is the number of elements in the set;
is the node attribute, namely the attribute of the terminal equipment of the node,
For accessing the service category, i.e. the service category requested by the blockchain access node to the blockchain receiving node,
The number of frequent accesses, that is, the number of access requests sent by an access node to a receiving node within a predetermined time range,
Is a node credit value;
acquiring preset weight corresponding to each characteristic requirement in network security characteristic data set
The preset weight is pre-agreed by the blockchain receiving node and the blockchain access node in advance according to the node attribute and the like, and then the access security value is calculated to be
Wherein, in the step (A),
for the access security of the blockchain access node,
indicating whether the network address of the requesting node is an illegal network address domain of the access node; if not, then
Is 1, if so, then
Is 0;
for the ith feature element in the network security feature data set,
the weighted value corresponding to the ith characteristic element is set, the value of i is 1 to n, and n is the total quantity of the characteristic elements of the network security characteristic data set;
the node safety evaluation model is constructed by
Wherein, in the process,
the output node safety measurement and evaluation value is obtained;
the total number of the service types of the access nodes belonging to the service types of the receiving nodes is represented;
a total number indicating that the service class of the access node does not belong to the service class of the receiving node;
for each of the sub-data model functions,
is a sub data model function weight;
wherein, in the step (A),
for the input layer to hidden layer thresholds in a neural network,
weights for input layers to hidden layers in a neural network,
the weights for the hidden layer to the output layer,
as a function of the input layer to the hidden layer
And b is a neural network correction value.
2. The method as claimed in claim 1, wherein the blockchain is composed of a plurality of blockchain link points, the blockchain link point for transmitting data is used as a blockchain access node, the blockchain link point for receiving data is used as a blockchain receiving node, the blockchain access node organizes the network data access request, the network data access request is transmitted to the blockchain receiving node, the blockchain receiving node performs network security monitoring, and allows or prohibits the data access party from accessing the node.
3. The method as claimed in claim 1, wherein a data transmission protocol is pre-defined between each blockchain access node and the blockchain receiving node, the data transmission protocol includes network security feature data, and the network security feature data includes a network address, a node attribute, an access service type, a frequent access number, and a credit value.
4. The method as claimed in claim 3, wherein each of the blockchain nodes can perform data communication therebetween, and each of the blockchain nodes has different limits for other blockchain nodes, including different ranges of network addresses allowed to be accessed, different attributes of devices allowed to be accessed, different degrees of openness for access service classes, different security evaluations due to access times, and different permissions allowed to be accessed by different credit values.
5. The blockchain-based network security monitoring method of claim 1,
acquiring network security feature data from the access request to form a network security feature data set;
acquiring preset weights corresponding to all characteristic requirements in a network security characteristic data set;
and calculating an access security value according to the network security feature data and the corresponding preset weight.
6. A network security monitoring system based on a blockchain, comprising:
the network security characteristic data acquisition module is used for receiving a network data access request sent by the blockchain access node and acquiring network security characteristic data from the access request;
the access security value calculation module is used for calculating an access security value of the access node of the block chain according to the network security feature data;
the node safety evaluation value calculation module is used for inputting the network safety characteristic data into a pre-constructed node safety evaluation model and outputting a node safety evaluation value;
the comparison module is used for comparing the access security value with the security evaluation value, if the access security value is greater than the security evaluation value, allowing the access of the blockchain access node, updating the node security evaluation model by using the network security feature data, and if the access security value is less than the security evaluation value, forbidding the access of the blockchain access node;
obtaining network security feature data from the access request to form a network security feature data set
Wherein, in the step (A),
n is the number of elements in the set;
is the node attribute, namely the attribute of the terminal equipment of the node,
For accessing the traffic class, i.e. the traffic class requested by the blockchain access node to the blockchain receiving node,
The number of frequent accesses, that is, the number of access requests sent by an access node to a receiving node within a predetermined time range,
Is a node credit value;
acquiring preset weight corresponding to each characteristic requirement in network security characteristic data set
The preset weight is pre-agreed by the blockchain receiving node and the blockchain access node in advance according to the node attribute and the like, and then the access security value is calculated to be
Wherein, in the step (A),
for the access security of the blockchain access node,
indicating whether the network address of the requesting node is an illegal network address domain of the access node; if not, then
Is 1, if so, then
Is 0;
for the ith feature element in the network security feature data set,
the weighted value corresponding to the ith characteristic element is set, the value of i is 1 to n, and n is the total quantity of the characteristic elements of the network security characteristic data set;
the node safety evaluation model is constructed by
Wherein, in the step (A),
the output node safety measurement and evaluation value is obtained;
representing the total number of the service types of the access nodes belonging to the service types of the receiving nodes;
a total number indicating that the service class of the access node does not belong to the service class of the receiving node;
for each sub-data model function,
is a sub data model function weight;
wherein, in the step (A),
for the input layer to hidden layer thresholds in a neural network,
weights for the input layer to the hidden layer in the neural network,
the weights for the hidden layer to the output layer,
as a function of the input layer to the hidden layer
And b is a neural network correction value.
7. The system according to claim 6, wherein the blockchain is composed of a plurality of blockchain link points, the blockchain link point for sending data is used as a blockchain access node, the blockchain link point for receiving data is used as a blockchain receiving node, the blockchain access node organizes the network data access request, the network data access request is sent to the blockchain receiving node, and the blockchain receiving node performs network security monitoring to allow or prohibit the data access party to access the node.
8. The system according to claim 6, wherein a data transmission protocol is pre-defined between each blockchain access node and the blockchain receiving node, and the data transmission protocol includes network security feature data, and the network security feature data includes a network address, a node attribute, an access service type, a number of frequent accesses, and a credit value.
9. The system according to claim 8, wherein each of the blockchain nodes is capable of communicating data with each other, but each of the blockchain nodes has different limits for other blockchain nodes, including different ranges of network addresses allowed to be accessed, different attributes of devices allowed to be accessed, different degrees of openness for access service types, different security evaluations performed by access times, and different permissions allowed to be accessed by different credit values.
10. The system according to claim 6, wherein the accessing the security value calculating module specifically includes: acquiring network security feature data from the access request to form a network security feature data set; acquiring preset weights corresponding to all characteristic requirements in a network security characteristic data set; and calculating an access security value according to the network security feature data and the corresponding preset weight.
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| CN113946875A (en) * | 2021-12-21 | 2022-01-18 | 北京中科金财科技股份有限公司 | Identity authentication method and system based on block chain |
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| CN111343192A (en) * | 2020-03-06 | 2020-06-26 | 青海卓旺智慧信息科技有限公司 | Network security supervision system based on block chain technology |
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| CN113590571A (en) * | 2021-09-29 | 2021-11-02 | 睿至科技集团有限公司 | Method and system for sharing private cloud resources and public cloud resources |
| CN113946875A (en) * | 2021-12-21 | 2022-01-18 | 北京中科金财科技股份有限公司 | Identity authentication method and system based on block chain |
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