CN109951450B - Server-based information security collection and interaction method and system - Google Patents
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Abstract
The invention provides a server-based information security collection and interaction method and a system, wherein the system comprises a server, a wireless sensor network and a user terminal, and the method comprises the following steps: the server receives perception information obtained by the wireless sensing network terminal; the server allocates an access authority level for the sensing information according to the important level of the sensor node corresponding to the sensing information; the server stores the perception information in a database partition corresponding to the access authority level of the perception information; the server receives an access request sent by a user terminal, wherein the access request comprises an access authority level of the user terminal and a database partition identifier requesting access; and when the access authority level of the user terminal exceeds the access authority level corresponding to the database partition identification requesting access, the server sends the perception information in the corresponding database partition to the user terminal.
Description
Technical Field
The invention relates to the technical field of information security, in particular to a server-based information security collection and interaction method and system.
Background
In the related technology, the sensing information is collected by adopting a wireless sensor network technology and is sent to a server for storage. In the process of information interaction between the user terminal and the server, the perception information is easily tampered and peeped by a third party, and the information safety cannot be guaranteed.
Disclosure of Invention
Aiming at the problems, the invention provides a server-based information security collection and interaction method and system.
The purpose of the invention is realized by adopting the following technical scheme:
the invention provides a server-based information security collection and interaction method in a first aspect, which comprises the following steps:
the method comprises the steps that a server receives sensing information obtained by a wireless sensing network end, the wireless sensing network comprises a plurality of sensor nodes and a single sink node, each sensor node collects the sensing information of a monitored position, the sink node is communicated with the sensor nodes in a wireless communication mode, collects the sensing information and transmits the sensing information to the server;
the server allocates an access authority level for the sensing information according to the important level of the sensor node corresponding to the sensing information;
the server stores the perception information in a database partition corresponding to the access authority level of the perception information;
the server receives an access request sent by a user terminal, wherein the access request comprises an access authority level of the user terminal and a database partition identifier requesting access;
and when the access authority level of the user terminal exceeds the access authority level corresponding to the database partition identification requesting access, the server sends the perception information in the corresponding database partition to the user terminal.
According to the embodiment, the access authority level is set for the perception information, so that the perception information is guaranteed to be transmitted to the user with the authority, and the safe transmission of the perception information is guaranteed.
In an implementation manner of the first aspect of the present invention, the server further determines important sensing information according to an importance level of a sensor node corresponding to the sensing information, and encrypts the important sensing information by using a preset encryption algorithm.
In one embodiment, the importance level of the sensor node can be set according to actual conditions. The importance levels of the sensor nodes may be divided into three or more levels, wherein the sensing information of the first level and/or the second level may be selected as the important sensing information.
In one embodiment, the encryption algorithm may be an existing algorithm suitable for encrypting the perceptual information. A corresponding decryption algorithm may be set in the user terminal having the higher access right level or setting to decrypt the perception information that has been encrypted.
In another embodiment, a corresponding encryption algorithm may be provided at the aggregation node to pre-encrypt the relatively important perceptual information at the aggregation node. The decryption algorithm may be pre-set in the server or in a predetermined user terminal.
According to the embodiment, the sensing information of the important sensor node is encrypted, so that a third party cannot know or tamper the encrypted information content, and the confidentiality of the sensing information is guaranteed.
In an implementation manner of the first aspect of the present invention, the server stores a list of important level information of sensor nodes, and the server assigns an access permission level to sensing information according to an important level of a sensor node corresponding to the sensing information, including:
the server acquires a sensor node identifier corresponding to the perception information;
inquiring the list according to the sensor node identification, and determining the access authority level corresponding to the sensor node identification;
and allocating the determined access authority level to the perception information.
The invention provides a server-based information security collection and interaction system, which comprises a wireless sensor network, a server and a user terminal, wherein the wireless sensor network comprises a plurality of sensor nodes and a single sink node, each sensor node collects the sensing information of a monitored position, and the sink node communicates with the sensor nodes in a wireless communication mode, collects the sensing information and transmits the sensing information to the server;
wherein, the server includes the database that is equipped with a plurality of database partitions, the server still includes:
a receiving module for receiving the perception information obtained by the wireless sensing network terminal,
the distribution module is used for distributing the access authority level to the perception information according to the important level of the sensor node corresponding to the perception information;
the storage module is used for storing the perception information in a database partition corresponding to the access authority level of the perception information;
the access execution module is used for receiving an access request sent by a user terminal, wherein the access request comprises an access authority level of the user terminal and a database partition identifier requesting access;
and the access execution module is also used for sending the perception information in the corresponding database partition to the user terminal when the access authority level of the user terminal exceeds the access authority level corresponding to the database partition identification which requests to access.
In an implementation manner of the second aspect of the present invention, the allocation module further determines important sensing information according to an importance level of a sensor node corresponding to the sensing information, and encrypts the important sensing information by using a preset encryption algorithm.
According to the embodiment, the sensing information of the important sensor node is encrypted, so that a third party cannot know or tamper the encrypted information content, and the confidentiality of the sensing information is guaranteed.
In an implementation manner of the second aspect of the present invention, the allocating module stores a list of important level information of sensor nodes, and allocates an access permission level to sensing information according to an important level of a sensor node corresponding to the sensing information, including:
the distribution module acquires sensor node identifications corresponding to the perception information;
inquiring the list according to the sensor node identification, and determining the access authority level corresponding to the sensor node identification;
and allocating the determined access authority level to the perception information.
The invention has the beneficial effects that: the method and the system realize the collection of the sensing information through the wireless sensor network, distribute corresponding access authority levels to the sensing information through the server, and encrypt important sensing information, ensure that the sensing information is only transmitted to users with access authority or provided for users with authority to check, effectively prevent the sensing information from being falsified and peeped by a third party in the transmission process, ensure the safety of the collected sensing information, and realize the safe interaction of information between the server and a user terminal.
Drawings
The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be obtained on the basis of the following drawings without inventive effort.
FIG. 1 is a flowchart illustrating a method for server-based secure information collection and interaction, in accordance with an exemplary embodiment of the present invention;
FIG. 2 is a block diagram illustrating the structure of a server-based information security collection and interaction system according to an exemplary embodiment of the present invention;
fig. 3 is a block diagram schematically illustrating the structure of a server according to an exemplary embodiment of the present invention.
Reference numerals:
the system comprises a wireless sensor network 1, a server 2, a user terminal 3, a database 10, a receiving module 20, an allocating module 30, a storing module 40 and an accessing executing module 50.
Detailed Description
The invention is further described with reference to the following examples.
Referring to fig. 1, an embodiment of a first aspect of the present invention provides a server-based information security collection and interaction method, where the method includes:
the method comprises the steps that an S1 server receives perception information obtained by a wireless sensor network end, the wireless sensor network comprises a plurality of sensor nodes and a single sink node, each sensor node collects perception information of a monitored position, the sink node communicates with the sensor nodes in a wireless communication mode, and the perception information is collected and transmitted to the server.
And S2, the server allocates access authority levels for the perception information according to the importance levels of the sensor nodes corresponding to the perception information.
S3, the server stores the perception information in the database partition corresponding to the access authority level.
S4, the server receives an access request sent by a user terminal, wherein the access request comprises the access authority level of the user terminal and the database partition identification which is requested to be accessed.
S5, when the access authority level of the user terminal exceeds the access authority level corresponding to the database partition identification requesting access, the server sends the perception information in the corresponding database partition to the user terminal.
According to the embodiment, the access authority level is set for the perception information, so that the perception information is guaranteed to be transmitted to the user with the authority, and the safe transmission of the perception information is guaranteed.
In an implementation manner of the first aspect of the present invention, the server further determines important sensing information according to an importance level of a sensor node corresponding to the sensing information, and encrypts the important sensing information by using a preset encryption algorithm.
In one embodiment, the importance level of the sensor node can be set according to actual conditions. The importance levels of the sensor nodes may be divided into three or more levels, wherein the sensing information of the first level and/or the second level may be selected as the important sensing information.
In one embodiment, the encryption algorithm may be an existing algorithm suitable for encrypting the perceptual information. A corresponding decryption algorithm may be set in the user terminal having the higher access right level or setting to decrypt the perception information that has been encrypted.
In another embodiment, a corresponding encryption algorithm may be provided at the aggregation node to pre-encrypt the relatively important perceptual information at the aggregation node. The decryption algorithm may be pre-set in the server or in a predetermined user terminal.
According to the embodiment, the sensing information of the important sensor node is encrypted, so that a third party cannot know or tamper the encrypted information content, and the confidentiality of the sensing information is guaranteed.
In an implementation manner of the first aspect of the present invention, the server stores a list of important level information of sensor nodes, and the server assigns an access permission level to sensing information according to an important level of a sensor node corresponding to the sensing information, including:
the server acquires a sensor node identifier corresponding to the perception information;
inquiring the list according to the sensor node identification, and determining the access authority level corresponding to the sensor node identification;
and allocating the determined access authority level to the perception information.
As shown in fig. 2 and fig. 3, a second aspect of the present invention provides an information security collection and interaction system based on a server 2, the system includes a wireless sensor network 1, a server 2 and a user terminal 3, the wireless sensor network 1 includes a plurality of sensor nodes and a single sink node, each sensor node collects sensing information of a monitored location, the sink node communicates with the sensor node in a wireless communication manner, collects the sensing information and transmits the sensing information to the server 2;
wherein, the server 2 includes a database 10 with a plurality of database 10 partitions, and the server 2 further includes:
a receiving module 20, configured to receive the sensing information obtained by the wireless sensor network,
the allocation module 30 is configured to allocate an access permission level to the sensing information according to the importance level of the sensor node corresponding to the sensing information;
the storage module 40 is used for storing the perception information in the partition of the database 10 corresponding to the access authority level of the perception information;
an access execution module 50, configured to receive an access request sent by a user terminal 3, where the access request includes an access permission level of the user terminal 3 and a partition identifier of a database 10 that requests access;
the access execution module 50 is further configured to send the sensing information in the corresponding database 10 partition to the user terminal 3 when the access authority level of the user terminal 3 exceeds the access authority level corresponding to the database 10 partition identifier requesting access.
According to the embodiment, the access authority level is set for the perception information, so that the perception information is guaranteed to be transmitted to the user with the authority, and the safe transmission of the perception information is guaranteed.
In an implementation manner of the second aspect of the present invention, the allocating module 30 further determines important sensing information according to an important level of a sensor node corresponding to the sensing information, and encrypts the important sensing information by using a preset encryption algorithm.
According to the embodiment, the sensing information of the important sensor node is encrypted, so that a third party cannot know or tamper the encrypted information content, and the confidentiality of the sensing information is guaranteed.
In an implementation manner of the second aspect of the present invention, the allocating module 30 stores a list of important level information of sensor nodes, and the allocating module 30 allocates an access permission level to sensing information according to an important level of a sensor node corresponding to the sensing information, including:
the distribution module 30 obtains sensor node identifiers corresponding to the perception information;
inquiring the list according to the sensor node identification, and determining the access authority level corresponding to the sensor node identification;
and allocating the determined access authority level to the perception information.
In the embodiment of the invention, the collection of the sensing information is realized through the wireless sensor network 1, the server 2 is used for distributing the corresponding access authority level to the sensing information and encrypting the important sensing information, so that the sensing information is only transmitted to a user with access authority or is provided for the user with authority to check, the sensing information is effectively prevented from being distorted and peeped by a third party in the transmission process, the safety of the collected sensing information is ensured, and the safety interaction of the information between the server 2 and the user terminal 3 is realized.
In the related art, people usually use the wireless sensor network 1 to monitor and collect data of a specific object so as to collect corresponding perception information into the server 2. However, due to the defect that the energy of the sensor nodes in the wireless sensor network 1 is limited, the stability and the accuracy of the sensing information collection are greatly influenced.
For the problem, in the information security collection and interaction method and system based on the server 2 in the above embodiment, the sink node divides each sensor node into two types, namely a direct transmission node and an indirect transmission node, and in the data transmission process, the indirect transmission node selects the closest sensor node as the next hop from the sensor nodes closer to the sink node within the communication range of the indirect transmission node, and sends the received sensing information to the next hop; the direct transmission node directly sends the received perception information to the aggregation node;
the sink node divides each sensor node into two types of direct transmission nodes and indirect transmission nodes, and the two types of direct transmission nodes and indirect transmission nodes comprise the following steps:
(1) the sink node broadcasts a distance determination message to each sensor node, each sensor node judges whether the sink node is in the communication range of the sink node after receiving the distance determination message, and if so, the sink node sends feedback information to the sink node;
(2) the sink node classifies all sensor nodes sending feedback information as direct communication nodes, calculates communication advantage values of the direct communication nodes, sorts the direct communication nodes according to the sequence of the communication advantage values from large to small, calibrates the direct communication node at the front 1/3 as a direct transmission node, calibrates other sensor nodes in the network as indirect transmission nodes, and broadcasts calibration sensing information to the sensor nodes;
the calculation formula of the communication advantage value is as follows:
in the formula, QyRepresents the communication advantage value of the direct communication node y, D (y, s) is the distance from the direct communication node y to the sink node,
the distance from the directly communicable node closest to the sink node,
the distance from the directly communicable node next closest to the sink node,
is the distance from the directly communicable node farthest from the sink node to the sink node, HyThe number of the sensor nodes in the communication range of the directly communicable node y, HBThe number of the sensor nodes in the communication range of the B-th direct communication node, V is the number of the sensor nodes classified as the direct communication nodes by the converged node, e1、e2Is a preset weight coefficient and satisfies e1+e2＝1。
In the embodiment, the sensor nodes are divided into two types, namely the direct transmission nodes and the indirect transmission nodes, so that the sensor nodes can communicate with the sink nodes in different communication modes according to the types of the sensor nodes, and the routing flexibility between the sensor nodes and the sink nodes is improved. The method comprises the steps of determining nodes capable of directly communicating according to the deployment condition of sensor nodes in a network, and calculating the communication advantage value of each node capable of directly communicating. The embodiment correspondingly provides a calculation formula of the communication advantage values, the nodes capable of directly communicating are sequenced according to the sequence of the communication advantage values from large to small, the nodes capable of directly communicating which are sequenced at the front 1/3 are marked as direct transmission nodes, on one hand, the direct communication between the sensor nodes with proper number and the sink nodes is ensured, the collection of perception information is ensured, on the other hand, the sensor nodes with small load pressure and short data transmission paths have higher probability to be in direct communication with the sink nodes, so that the energy consumption of the sensor nodes around the sink nodes is further balanced, and the operation stability of the wireless sensor network 1 is improved.
In a realisable manner, every other preset period Δ T0The sink node acquires energy information of the direct transmission node and the directly communicable node not selected as the direct transmission node, and determines whether the energy information satisfies the followingConditions are as follows:
in the formula, EIFor the current residual energy of the ith direct transfer node, K1For the number of current direct transfer nodes, EJIs the current remaining energy, K, of the J-th of said remaining directly communicable nodes2For the number of directly communicable nodes not selected as direct transfer nodes,
for judging the value function, it is used to judge whether there is the current remaining energy less than the preset energy lower limit EminThe direct transmission node of (a), if any,
otherwise
If the condition is met, the sink node randomly selects P direct communication nodes from the direct communication nodes which are not selected as direct transmission nodes to mark as the direct transmission nodes, and correspondingly broadcasts the marking information:
in the formula (I), the compound is shown in the specification,
indicating that the current residual energy is less than a preset energy lower limit EminThe number of direct transmission nodes of (a),
presentation pair
The result of the calculation of (a) is rounded.
In the embodiment, when the current residual energy of the direct transmission node is lower than the energy of the residual directly-communicable node, or when the direct transmission node lower than the energy lower limit exists, P sensor nodes are selected from the residual directly-communicable node as the direct transmission node, which is beneficial to further balancing the energy of each sensor node in the network, further avoiding the occurrence of an energy void phenomenon, improving the operation stability of the wireless sensor network 1, and laying a good foundation for reliably collecting sensing information; in this embodiment, when P sensor nodes are selected as the direct transmission nodes, a calculation formula of P is further provided, so that the number of the increased direct transmission nodes can be increased along with the increase of the energy difference, and the sensor nodes in indirect and convergent communication can be converted into the direct transmission nodes more scientifically and reasonably.
In one implementation, if the current remaining energy is less than the preset energy lower limit EminThe sink node further obtains the sensing information of the direct transmission node and other sensor nodes in the communication range of the direct transmission node, calculates the information difference degree of the direct transmission node and other sensor nodes, and if the information difference degree is greater than a set difference degree threshold value, the sink node sends a sleep instruction to the direct transmission node to prompt the direct transmission node to enter a sleep state, wherein the calculation formula of the information difference degree is as follows:
in the formula, Wz(t) represents that the current residual energy is less than the preset energy lower limit E at the current time tminThe information difference degree of the direct transmission node z and other sensor nodes in the communication range of the direct transmission node z in the aspect of sensing information; x is the number ofz(t) is the perception information, x, collected by the direct transmission node z at the current moment tz j(T) is the perception information acquired by the jth sensor node in the communication range of the direct transmission node z at the current moment T, TzThe number of the sensor nodes in the communication range of the direct transmission node z is shown.
When the wireless sensor network 1 technology is adopted for sensing information collection, the accuracy of the collected sensing information is low easily caused by too low energy of sensor nodes. For the problem, in this embodiment, the sensing information acquired by the direct transmission node with lower energy is compared with the sensing information of other sensor nodes in the communication range of the sink node, and the direct transmission node is put to sleep when the information difference degree is greater than a certain threshold value. According to the embodiment, the acquisition and transmission of the sensing information with too low precision can be inhibited, the energy consumption of sensing information transmission is reduced, the influence of sensor nodes with poor sensing information acquisition precision on the precision of the whole sensing information is avoided, and the accuracy of sensing information collection is improved.
It will be clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be performed by different functional modules according to needs, that is, the internal structure of the system is divided into different functional modules to perform all or part of the above described functions. For the specific working process of the system and the terminal described above, reference may be made to the corresponding process in the foregoing method embodiment, which is not described herein again.
From the above description of embodiments, it is clear for a person skilled in the art that the embodiments described herein can be implemented in hardware, software, firmware, middleware, code or any appropriate combination thereof. For a hardware implementation, a processor may be implemented in one or more of the following units: an application specific integrated circuit, a digital signal processor, a digital signal processing system, a programmable logic device, a field programmable gate array, a processor, a controller, a microcontroller, a microprocessor, other electronic units designed to perform the functions described herein, or a combination thereof. For a software implementation, some or all of the procedures of an embodiment may be performed by a computer program instructing associated hardware. In practice, the program may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a computer. The computer-readable medium can include, but is not limited to, random access memory, read only memory images, electrically erasable programmable read only memory or other optical disk storage, magnetic disk storage media or other magnetic storage systems, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (6)
1. A server-based information security collection and interaction method is characterized by comprising the following steps:
the method comprises the steps that a server receives sensing information obtained by a wireless sensor network end, the wireless sensor network comprises a plurality of sensor nodes and a single sink node, each sensor node collects the sensing information of a monitored position, the sink node is communicated with the sensor nodes in a wireless communication mode, collects the sensing information and transmits the sensing information to the server;
the server allocates an access authority level for the sensing information according to the important level of the sensor node corresponding to the sensing information;
the server stores the perception information in a database partition corresponding to the access authority level of the perception information;
the server receives an access request sent by a user terminal, wherein the access request comprises an access authority level of the user terminal and a database partition identifier requesting access;
when the access authority level of the user terminal exceeds the access authority level corresponding to the database partition identification requesting access, the server sends the perception information in the corresponding database partition to the user terminal;
the sink node divides each sensor node into a direct transmission node and an indirect transmission node, and in the data transmission process, the indirect transmission node selects the nearest sensor node as the next hop in the communication range of the indirect transmission node relative to the sensor nodes closer to the sink node, and sends the received sensing information to the next hop; the direct transmission node directly sends the received perception information to the aggregation node;
the sink node divides each sensor node into two types of direct transmission nodes and indirect transmission nodes, and the two types of direct transmission nodes and indirect transmission nodes comprise the following steps:
(1) the sink node broadcasts a distance determination message to each sensor node, each sensor node judges whether the sink node is in the communication range of the sink node after receiving the distance determination message, and if so, the sink node sends feedback information to the sink node;
(2) the sink node classifies all sensor nodes sending feedback information as direct communication nodes, calculates communication advantage values of the direct communication nodes, sorts the direct communication nodes according to the sequence of the communication advantage values from large to small, calibrates the direct communication node at the front 1/3 as a direct transmission node, calibrates other sensor nodes in the network as indirect transmission nodes, and broadcasts calibration sensing information to the sensor nodes;
the calculation formula of the communication advantage value is as follows:
in the formula, QyRepresents the communication advantage value of the direct communication node y, D (y, s) is the distance from the direct communication node y to the sink node,
the distance from the directly communicable node closest to the sink node,
the distance from the directly communicable node next closest to the sink node,
is the distance from the directly communicable node farthest from the sink node to the sink node, HyThe number of the sensor nodes in the communication range of the directly communicable node y, HBThe number of the sensor nodes in the communication range of the B-th direct communication node, V is the number of the sensor nodes classified as the direct communication nodes by the converged node, e1、e2Is a preset weight coefficient and satisfies e1+e2＝1。
2. The server-based information security collection and interaction method according to claim 1, wherein the server further determines important sensing information according to the importance level of the sensor node corresponding to the sensing information, and encrypts the important sensing information by using a preset encryption algorithm.
3. The server-based information security collection and interaction method according to claim 1, wherein the server stores a list of importance level information of sensor nodes, and the server assigns an access right level to the sensing information according to the importance level of the sensor node corresponding to the sensing information, comprising:
the server acquires a sensor node identifier corresponding to the perception information;
inquiring the list according to the sensor node identification, and determining the access authority level corresponding to the sensor node identification;
and allocating the determined access authority level to the perception information.
4. A server-based information security collection and interaction system is characterized by comprising a wireless sensor network, a server and a user terminal, wherein the wireless sensor network comprises a plurality of sensor nodes and a single sink node, each sensor node collects sensing information of a monitored position, and the sink node communicates with the sensor nodes in a wireless communication mode, collects the sensing information and transmits the sensing information to the server;
wherein, the server includes the database that is equipped with a plurality of database partitions, the server still includes:
a receiving module for receiving the perception information obtained by the wireless sensor network terminal,
the distribution module is used for distributing the access authority level to the perception information according to the important level of the sensor node corresponding to the perception information;
the storage module is used for storing the perception information in a database partition corresponding to the access authority level of the perception information;
the access execution module is used for receiving an access request sent by a user terminal, wherein the access request comprises an access authority level of the user terminal and a database partition identifier requesting access;
the access execution module is further used for sending the perception information in the corresponding database partition to the user terminal when the access authority level of the user terminal exceeds the access authority level corresponding to the database partition identification which is requested to be accessed;
the sink node divides each sensor node into a direct transmission node and an indirect transmission node, and in the data transmission process, the indirect transmission node selects the nearest sensor node as the next hop in the communication range of the indirect transmission node relative to the sensor nodes closer to the sink node, and sends the received sensing information to the next hop; the direct transmission node directly sends the received perception information to the aggregation node;
the sink node divides each sensor node into two types of direct transmission nodes and indirect transmission nodes, and the two types of direct transmission nodes and indirect transmission nodes comprise the following steps:
(1) the sink node broadcasts a distance determination message to each sensor node, each sensor node judges whether the sink node is in the communication range of the sink node after receiving the distance determination message, and if so, the sink node sends feedback information to the sink node;
(2) the sink node classifies all sensor nodes sending feedback information as direct communication nodes, calculates communication advantage values of the direct communication nodes, sorts the direct communication nodes according to the sequence of the communication advantage values from large to small, calibrates the direct communication node at the front 1/3 as a direct transmission node, calibrates other sensor nodes in the network as indirect transmission nodes, and broadcasts calibration sensing information to the sensor nodes;
the calculation formula of the communication advantage value is as follows:
in the formula, QyRepresents the communication advantage value of the direct communication node y, D (y, s) is the distance from the direct communication node y to the sink node,
the distance from the directly communicable node closest to the sink node,
the distance from the directly communicable node next closest to the sink node,
is the distance from the directly communicable node farthest from the sink node to the sink node, HyThe number of the sensor nodes in the communication range of the directly communicable node y, HBThe number of the sensor nodes in the communication range of the B-th directly communicable node and V are the sensors classified as the directly communicable nodes by the converged nodeNumber of device nodes, e1、e2Is a preset weight coefficient and satisfies e1+e2＝1。
5. The server-based information security collection and interaction system according to claim 4, wherein the distribution module further determines important sensing information according to the importance level of the sensor node corresponding to the sensing information, and encrypts the important sensing information by using a preset encryption algorithm.
6. The system as claimed in claim 4, wherein the distribution module stores a list of importance level information of the sensor nodes, and the distribution module distributes access right levels to the sensing information according to the importance levels of the sensor nodes corresponding to the sensing information, and the system comprises:
the distribution module acquires sensor node identifications corresponding to the perception information;
inquiring the list according to the sensor node identification, and determining the access authority level corresponding to the sensor node identification;
and allocating the determined access authority level to the perception information.
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