CN114615266B - Intelligent search system based on information system integration - Google Patents

Intelligent search system based on information system integration Download PDF

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CN114615266B
CN114615266B CN202210245209.9A CN202210245209A CN114615266B CN 114615266 B CN114615266 B CN 114615266B CN 202210245209 A CN202210245209 A CN 202210245209A CN 114615266 B CN114615266 B CN 114615266B
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CN114615266A (en
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高仲谦
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/10—Protocols in which an application is distributed across nodes in the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/10—Protocols in which an application is distributed across nodes in the network
    • H04L67/1095—Replication or mirroring of data, e.g. scheduling or transport for data synchronisation between network nodes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/50—Reducing energy consumption in communication networks in wire-line communication networks, e.g. low power modes or reduced link rate

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Abstract

The invention discloses an intelligent search system based on information system integration, which comprises a peer-to-peer network architecture module, a peer-to-peer cloud resource release module and a resource interval search module, wherein the peer-to-peer network architecture module is used for constructing a network based on a query system, the peer-to-peer cloud resource release module is used for releasing resources and positioning by using a distributed hash table, the resource interval search module is used for performing interval search in a way of combining ciphertext with a routing ring, the peer-to-peer network architecture module is electrically connected with the peer-to-peer cloud resource release module, the peer-to-peer cloud resource release module is electrically connected with the resource interval search module, a structured peer-to-peer technology is used for constructing a cloud system, and when the resource is searched, the structured peer-to-peer cloud is used for performing interval search in a way of combining ciphertext with the routing ring, so that the defect of the structured peer-to-peer cloud is overcome, and the privacy of users is protected by the ciphertext search.

Description

Intelligent search system based on information system integration
Technical Field
The invention relates to the technical field of peer-to-peer cloud interval searching, in particular to an intelligent searching system based on information system integration.
Background
Cloud computing is a computing mode for sharing software and hardware resources and data based on the Internet, integrates resources by using a virtual mode so as to realize that users conveniently use the shared resources, at present, services and resources in the cloud computing are controlled by service providers, so that the cloud computing has better reliability and controllability, cloud expandability is poor and the cost is higher due to monopoly of the cloud resources by a few service providers, and peer-to-peer computing integrates the resources provided by users in the Internet, so that the resource sharing and the position peer-to-peer of each user are realized, the resource utilization rate is high, the network expandability is good, but the stability and controllability of the network are not good due to the conversation heterogeneous characteristics of the users in the peer-to-peer network, and the peer-to-peer computing technology and the cloud computing technology form a complementary relationship in the state.
A peer-to-peer cloud formed by a structured peer-to-peer computing system is utilized, a distributed hash table is utilized for publishing and positioning resources, when the resources are published, firstly, a hash algorithm is utilized for computing object identifications of resource keywords, then, the resources are published to nodes close to the node identifications, and the resources are searched according to hash values when the resources are searched, but the problem is that the hash algorithm can map the resources with similar attribute values to the whole irrelevant object identifications to a great extent, and then, the resources are published to irrelevant nodes, so that the resource keyword interval searching is difficult to support. Therefore, it is necessary to design an intelligent search system based on information system integration that protects user privacy and enables interval searching.
Disclosure of Invention
The invention aims to provide an intelligent search system based on information system integration, so as to solve the problems in the background technology.
In order to solve the technical problems, the invention provides the following technical scheme: the intelligent search system based on the information system integration comprises a peer-to-peer network architecture module, a peer-to-peer cloud resource release module and a resource interval search module, wherein the peer-to-peer network architecture module is used for constructing a network based on a path system, the peer-to-peer cloud resource release module is used for releasing resources and positioning by using a distributed hash table, the resource interval search module is used for performing interval search in a mode of combining ciphertext with a routing ring, the peer-to-peer network architecture module is electrically connected with the peer-to-peer cloud resource release module, and the peer-to-peer cloud resource release module is electrically connected with the resource interval search module.
According to the technical scheme, the peer-to-peer network architecture module comprises a node status peer-to-peer module, a cloud storage adaptation module and a resource and positioning release module, wherein the node status peer-to-peer module is used for guaranteeing node status peer-to-peer in the network architecture so as to solve the problem of trust dependence of a traditional cloud storage system on a cloud service provider, the cloud storage adaptation module is used for guaranteeing that nodes in a network are stable nodes so as to adapt to cloud storage requirements, the resource and positioning release module is used for releasing resources, resource marks and other information of the resources to related nodes, and the node status peer-to-peer module, the cloud storage adaptation module and the resources are electrically connected with the positioning release module.
According to the technical scheme, the peer-to-peer cloud resource issuing module comprises a ciphertext attribute and resource marking module, an object identification issuing module and a resource routing loop linking module, wherein the ciphertext attribute and resource marking module is used for calculating the ciphertext attribute of the existing similar resource by using a setting algorithm and determining a resource marking, the object identification issuing module is used for hashing the object identification of the resource ciphertext attribute according to the setting algorithm and issuing a routing message by using a routing algorithm, the resource routing loop linking module is used for forming a resource routing loop after the mutual sending and receiving of the routing information among nodes, the ciphertext attribute and the resource marking module are electrically connected with the object identification issuing module, and the object identification issuing module is electrically connected with the resource routing loop linking module.
According to the technical scheme, the resource interval search module comprises a resource attribute value encryption module, a resource type positioning module, a routing ring interval positioning module and an interval search module, wherein the resource attribute value encryption module calculates ciphertext attributes of the resource attribute value encryption module according to a homomorphic encryption algorithm according to attribute values of resources, the resource type positioning module is used for positioning the resource attribute value encryption module into a specific resource routing ring according to types of resource marks, the routing ring interval positioning module is used for performing interval positioning of the resource routing ring by storing routing information of the same resource marks according to nodes with the same resource, the interval search module is used for performing interval search in a mode of combining the ciphertext with the routing ring, the resource attribute value encryption module is electrically connected with the interval search module, and the resource type positioning module is electrically connected with the routing ring interval positioning module.
According to the technical scheme, the intelligent searching method of the intelligent searching system based on the information system integration comprises the following steps:
step S1: constructing a peer-to-peer network by using a network architecture of a path system, wherein stable node status peer-to-peer adapting to cloud storage in the peer-to-peer network;
step S2: encrypting the attribute values through a homomorphic encryption algorithm, and calculating resource marks in the form of ciphertext, wherein resources with similar attribute values have the same resource marks;
step S3: the nodes corresponding to the node identifiers store the released resources, and the same type of resources with the same resource marks are linked together by adopting a chained ring method to form a resource routing ring;
step S4: and performing resource positioning according to the resource type, and performing interval searching in a mode of combining ciphertext with a routing ring based on interval positioning of the resource routing ring.
According to the above technical solution, the step S2 further includes the following steps:
step S21: calculating according to the attribute value of the resource and a homomorphic encryption algorithm to obtain a ciphertext attribute fhvalue;
step S22: hashing the resource ciphertext attribute fhvalue into an object identifier O according to a set algorithm, and issuing a routing message by using a routing algorithm of the structured peer-to-peer system;
step S23: searching a network node N of a node identifier similar to the object identifier value O, and publishing the resource, the resource mark and other information of the resource to the node;
step S24: the same type of resource has the same resource mark S, and a node K with the same resource mark value is searched in the peer-to-peer cloud system by using the resource mark value.
According to the above technical solution, the step S24 further includes the following steps:
step S241: when the node K with the same resource mark value exists in the peer-to-peer cloud system, the routing information of the node M recorded in the routing link node information table of the node K is sent to the node N;
step S242: the node N generates a routing link node information table of the node N according to the information, and sends the routing information of the node N to the node K, and the node K updates the routing link node information table according to the information;
step S243: when the node K with the same resource mark is not found in the searching process, the type of resource is the first joining system, and the own routing information is put into the routing link node information table.
According to the above technical solution, the step S3 further includes the following steps:
step S31: before a node is inserted into a specific resource routing ring, the node needs to be positioned to the resource routing ring according to the type of the resource;
step S32: when the known resource type is plaintext M, randomly selecting a value V in a plaintext interval [ Mmin, mmax ], and calculating an resource mark S and an attribute value interval [ MIN, MAX ] of the resource mark by using a homomorphic encryption mechanism;
step S33: calculating a ciphertext attribute value FHV by using a random function in a resource attribute value interval, and then calculating an object identifier O of the attribute value according to a set algorithm;
step S34: and (3) routing to the node K by using a routing algorithm of the peer-to-peer cloud system, and checking whether the resource marked as S exists in the K node.
According to the above technical solution, the step S34 further includes the following steps:
step S341: when the resource marked as S in the K node exists, the search is ended and the search returns to be successful, and when the resource marked as S in the K node does not exist, a new ciphertext attribute value FHV is randomly generated in the attribute interval again, and the search is repeated;
step S342: until the search of the type of resources is successful or the search times are over-limited and fail, the search algorithm is ended.
According to the above technical solution, the step S4 further includes the following steps:
step S41: after releasing the resources in a resource routing ring mode, in a peer-to-peer cloud system, nodes with the same resources form a resource routing ring by storing routing information with the same resource marks;
step S42: when the keyword interval searched by the user is [ V1, V2], if the keyword is plaintext, calculating a ciphertext interval [ FHV1, FHV2] by using a homomorphic encryption mechanism, and calculating an resource mark S;
step S43: according to the resource marking value S, searching a node N for storing the type of resources through a resource positioning algorithm, and comparing the search interval keywords in a resource routing loop by taking the node N as a starting node.
Compared with the prior art, the invention has the following beneficial effects: the invention is provided with a peer-to-peer network architecture module, a peer-to-peer cloud resource publishing module and a resource interval searching module, builds a coverage network of a cloud system by using a structured peer-to-peer system, adopts a node for storing the same type of resources to link into a resource routing ring, thereby solving the problem that the structured peer-to-peer cloud system is not suitable for interval searching, and in addition, in order to ensure the confidentiality of data, realizing the resource searching under ciphertext by using a homomorphic encryption mechanism, and realizing the protection of user privacy.
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The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
FIG. 1 is a schematic diagram of the system module composition of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, the present invention provides the following technical solutions: an intelligent search system based on information system integration comprises a peer-to-peer network architecture module, a peer-to-peer cloud resource issuing module and a resource interval search module, wherein the peer-to-peer network architecture module is used for constructing a network based on a path system, the peer-to-peer cloud resource issuing module is used for issuing resources and positioning by using a distributed hash table, the resource interval search module is used for performing interval search by combining ciphertext with a routing ring, the peer-to-peer network architecture module is electrically connected with the peer-to-peer cloud resource issuing module, the peer-to-peer cloud resource issuing module is electrically connected with the resource interval search module, a structured peer-to-peer technology is used for constructing a cloud system, aiming at the problem that the traditional P2P technology is only suitable for accurate searching and the privacy protection requirement of users, a peer-to-peer cloud interval searching technology realized in a ciphertext state is used for constructing peer-to-peer clouds on the basis of the policy, the homomorphic encryption technology is used for encrypting the resource attribute values before the resource is released, the nodes for storing the same type of resources are linked to form a resource routing ring when the resource is released, and interval searching is performed in a mode of combining the ciphertext with the routing ring when the resource is searched, so that the defect of the structured peer-to-peer clouds in the aspect of interval searching is wholly made up, and the privacy protection of the users is realized through ciphertext searching.
The peer-to-peer network architecture module comprises a node position peer-to-peer module, a cloud storage adaptation module and a resource and positioning release module, wherein the node position peer-to-peer module is used for ensuring that the node position peer-to-peer in the network architecture so as to solve the problem of trust dependence of a traditional cloud storage system on a cloud service provider, the cloud storage adaptation module is used for ensuring that nodes in the network are stable nodes so as to adapt to cloud storage requirements, the resource and positioning release module is used for releasing resources, resource marks and other information of the resources to related nodes, the node position peer-to-peer module, the cloud storage adaptation module and the resource are electrically connected with the positioning release module, and the node position peer-to-peer in the network architecture is used for solving the problem of trust dependence on the cloud service provider due to centralization of the traditional cloud storage system, and releasing the resources and positioning by using a distributed hash table is aimed at interval search technology due to the characteristics of the fact that a hash function has antigen image property, second primary image resistance, strong collision resistance and the like.
The peer-to-peer cloud resource issuing module comprises a ciphertext attribute and resource marking module, an object identification issuing module and a resource routing loop linking module, wherein the ciphertext attribute and resource marking module is used for calculating the ciphertext attribute of the existing similar resources by using a setting algorithm and determining the resource marking, the object identification issuing module is used for hashing the object identification of the resource ciphertext attribute according to the setting algorithm and issuing a routing message by using a routing algorithm, the resource routing loop linking module is used for forming a resource routing loop after mutually sending and receiving the routing information among nodes, the ciphertext attribute and the resource marking module are electrically connected with the object identification issuing module, the object identification issuing module is electrically connected with the resource routing loop linking module, and the problems that the encryption speed is slow and the search efficiency of a search algorithm affects most of the current popular encryption algorithm are considered.
The resource interval search module comprises a resource attribute value encryption module, a resource type positioning module, a routing ring interval positioning module and an interval search module, wherein the resource attribute value encryption module calculates ciphertext attribute according to homomorphic encryption algorithm according to attribute value of a resource, the resource type positioning module is used for positioning the specific resource routing ring according to the type of the resource mark, the routing ring interval positioning module is used for performing interval positioning of the resource routing ring by storing routing information of the same resource mark according to nodes with the same resource, the interval search module is used for performing interval search by combining the ciphertext with the routing ring, the resource attribute value encryption module is electrically connected with the interval search module, and the resource type positioning module is electrically connected with the routing ring interval positioning module.
An intelligent searching method of an intelligent searching system based on information system integration, the method comprises the following steps:
step S1: constructing a peer-to-peer network by using a network architecture of a path system, wherein the path system is a structured peer-to-peer system constructed by adopting a distributed hash table and is suitable for stable node status peer-to-peer of cloud storage, and the node status peer-to-peer in the network architecture is used for solving the problem that the traditional cloud storage system has trust dependence on a cloud service provider due to centralization;
step S2: encrypting the attribute values through a homomorphic encryption algorithm, and calculating resource marks in the form of ciphertext, wherein resources with similar attribute values have the same resource marks;
step S3: the nodes corresponding to the node identifications store the released resources, the same type of resources marked by the resources are linked together by adopting a chained ring method to form a resource routing ring, after the resources are released in a resource routing ring mode, the nodes with the same resources in the peer-to-peer cloud system form the resource routing ring after storing the routing information of the same resource marks;
step S4: according to the resource type, the resource positioning is carried out, the interval positioning is based on the resource routing ring, the interval searching is carried out in a mode of combining ciphertext with the routing ring, in the resource issuing algorithm, the node needs to be positioned to the resource routing ring according to the resource type before being inserted into the resource routing ring, therefore, after one resource type is given, how to find the resource in the system is one of main algorithms of the interval searching technology, and the interval searching is carried out based on a ciphertext searching mechanism by applying the same type of resource positioning algorithm.
Step S2 further comprises the steps of:
step S21: the method is characterized in that a ciphertext attribute fhvalue is obtained by calculating according to a homomorphic encryption algorithm according to an attribute value of a resource, wherein the homomorphic encryption algorithm is a homomorphic encryption scheme based on fault-tolerant learning, and an identity-based homomorphic system constructed by using a matrix and an approximate feature vector is different from a traditional homomorphic encryption scheme in that homomorphic encryption can be realized without homomorphic operation keys, confidentiality of the attribute value of the resource is ensured, and subsequent links of resources of the same type are facilitated to form a resource routing ring;
step S22: hashing the resource ciphertext attribute fhvalue into an object identifier O according to a set algorithm, and issuing a routing message by using a routing algorithm of the structured peer-to-peer system;
step S23: searching a network node N of a node identifier similar to the object identifier value O, and publishing the resource, the resource mark and other information of the resource to the node;
step S24: the same type of resource has the same resource mark S, and a node K with the same resource mark value is searched in the peer-to-peer cloud system by using the resource mark value.
Step S24 further comprises the steps of:
step S241: when the node K with the same resource mark value exists in the peer-to-peer cloud system, the routing information of the node M recorded in the routing link node information table of the node K is sent to the node N;
step S242: the node N generates a routing link node information table of the node N according to the information, and sends the routing information of the node N to the node K, and the node K updates the routing ring node information table according to the information, so that the node N can join in a resource routing ring;
step S243: when the node K with the same resource mark is not found in the searching process, the type of resource is the first joining system, and the own routing information is put into the routing link node information table.
Step S3 further comprises the steps of:
step S31: before a node is inserted into a specific resource routing ring, the node needs to be positioned to the resource routing ring according to the type of the resource;
step S32: when the known resource type is plaintext M, randomly selecting a value V in a plaintext interval [ Mmin, mmax ], and calculating an resource mark S and an attribute value interval [ MIN, MAX ] of the resource mark by using a homomorphic encryption mechanism;
step S33: calculating a ciphertext attribute value FHV by using a random function in a resource attribute value interval, and then calculating an object identifier O of the attribute value according to a set algorithm;
step S34: the routing algorithm of the peer-to-peer cloud system is used for routing to the node K, whether the resource marked as S exists in the node K is checked, the node K is constructed on the basis that the peer-to-peer cloud coverage network structure is not changed, the nodes storing the same type of resources are linked into a resource routing ring, the self-adaption is high, ciphertext resource positioning is supported, plaintext resource positioning is also supported, and when a user performs positioning under the condition of having plaintext, in order to ensure confidentiality of an operation process, homomorphic password operation is performed once before the algorithm is called.
Step S34 further includes the steps of:
step S341: when the resource marked as S in the K node exists, the search is ended and the search returns to be successful, and when the resource marked as S in the K node does not exist, a new ciphertext attribute value FHV is randomly generated in the attribute interval again, and the search is repeated;
step S342: until the search of the type of resources is successful or the search times are over-limited and fail, the search algorithm is ended.
Step S4 further comprises the steps of:
step S41: after releasing the resources in a resource routing ring mode, in a peer-to-peer cloud system, nodes with the same resources form a resource routing ring by storing routing information with the same resource marks;
step S42: when the keyword interval searched by the user is [ V1, V2], if the keyword is plaintext, calculating a ciphertext interval [ FHV1, FHV2] by using a homomorphic encryption mechanism, and calculating an resource mark S;
step S43: searching a node N storing the type of resources through a resource positioning algorithm according to the resource marking value S, comparing search interval keywords in a resource routing ring by taking the node N as a starting node, returning a node identifier storing the resource nodes to a user when the searched resource attribute value is within the search interval, storing routing information of the nodes into a resource node set, and taking out the routing nodes in a node routing ring node information table as next searched nodes until traversing the resource routing ring is finished.
It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art, although the present invention has been described in detail with reference to the foregoing embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (1)

1. An intelligent search system based on information system integration comprises a peer-to-peer network architecture module, a peer-to-peer cloud resource release module and a resource interval search module, and is characterized in that: the peer-to-peer network architecture module is used for constructing a network based on a path system, the peer-to-peer cloud resource release module is used for releasing resources and positioning by using a distributed hash table, the resource interval search module is used for performing interval search in a mode of combining ciphertext with a routing ring, the peer-to-peer network architecture module is electrically connected with the peer-to-peer cloud resource release module, and the peer-to-peer cloud resource release module is electrically connected with the resource interval search module;
the peer-to-peer network architecture module comprises a node position peer-to-peer module, a cloud storage adaptation module and a resource and positioning release module, wherein the node position peer-to-peer module is used for ensuring node position peer-to-peer in the network architecture so as to overcome the problem of trust dependence of a traditional cloud storage system on a cloud service provider, the cloud storage adaptation module is used for ensuring that nodes in a network are stable nodes so as to adapt to cloud storage requirements, the resource and positioning release module is used for releasing resources, resource marks and other information of the resources to related nodes, and the node position peer-to-peer module, the cloud storage adaptation module and the resource are electrically connected with the positioning release module;
the peer-to-peer cloud resource issuing module comprises a ciphertext attribute and resource marking module, an object identification issuing module and a resource routing loop linking module, wherein the ciphertext attribute and resource marking module is used for calculating the ciphertext attribute of the existing similar resource by using a setting algorithm and determining a resource marking, the object identification issuing module is used for hashing the object identification by the resource ciphertext attribute according to the setting algorithm and issuing a routing message by using a routing algorithm, the resource routing loop linking module is used for forming a resource routing loop after the nodes mutually send and receive the routing information, the ciphertext attribute and the resource marking module are electrically connected with the object identification issuing module, and the object identification issuing module is electrically connected with the resource routing loop linking module;
the resource interval search module comprises a resource attribute value encryption module, a resource type positioning module, a routing ring interval positioning module and an interval search module, wherein the resource attribute value encryption module calculates ciphertext attribute according to a homomorphic encryption algorithm according to attribute values of resources, the resource type positioning module is used for positioning a specific resource routing ring according to types of resource marks, the routing ring interval positioning module is used for performing interval positioning of the resource routing ring by storing routing information of the same resource marks according to nodes with the same resources, the interval search module is used for performing interval search in a mode of combining the ciphertext with the routing ring, the resource attribute value encryption module is electrically connected with the interval search module, and the resource type positioning module is electrically connected with the routing ring interval positioning module;
the operation method of the intelligent search system based on the information system integration comprises the following steps:
step S1: constructing a peer-to-peer network by using a network architecture of a path system, wherein stable node status peer-to-peer adapting to cloud storage in the peer-to-peer network;
step S2: encrypting the attribute values through a homomorphic encryption algorithm, and calculating resource marks in the form of ciphertext, wherein resources with similar attribute values have the same resource marks;
step S3: the nodes corresponding to the node identifiers store the released resources, and the same type of resources with the same resource marks are linked together by adopting a chained ring method to form a resource routing ring;
step S4: performing resource positioning according to the resource type, and performing interval searching in a manner of combining ciphertext with a routing ring based on interval positioning of a resource routing ring;
the step S2 further comprises the steps of:
step S21: calculating according to the attribute value of the resource and a homomorphic encryption algorithm to obtain a ciphertext attribute fhvalue;
step S22: hashing the resource ciphertext attribute fhvalue into an object identifier O according to a set algorithm, and issuing a routing message by using a routing algorithm of the structured peer-to-peer system;
step S23: searching a network node N of a node identifier similar to the object identifier value O, and publishing the resource, the resource mark and the information of the resource to the node;
step S24: the same type of resources have the same resource mark S, and a node K with the same resource mark value is searched in a peer-to-peer cloud system by utilizing the resource mark value;
the step S24 further includes the steps of:
step S241: when the node K with the same resource mark value exists in the peer-to-peer cloud system, the routing information of the node M recorded in the routing link node information table of the node K is sent to the node N;
step S242: the node N generates a routing link node information table of the node N according to the information, and sends the routing information of the node N to the node K, and the node K updates the routing link node information table according to the information;
step S243: when the node K with the same resource mark is not found in the searching process, indicating that the type of resource is a first joining system, putting own routing information into a routing link node information table;
the step S3 further includes the steps of:
step S31: before a node is inserted into a specific resource routing ring, the node needs to be positioned to the resource routing ring according to the type of the resource;
step S32: when the known resource type is plaintext M, randomly selecting a value V in a plaintext interval [ Mmin, mmax ], and calculating an resource mark S and an attribute value interval [ MIN, MAX ] of the resource mark by using a homomorphic encryption mechanism;
step S33: calculating a ciphertext attribute value FHV by using a random function in a resource attribute value interval, and then calculating an object identifier O of the attribute value according to a set algorithm;
step S34: routing to a node K by using a routing algorithm of the peer-to-peer cloud system, and checking whether resources marked as S exist in the node K;
the step S34 further includes the steps of:
step S341: when the resource marked as S in the K node exists, the search is ended and the search returns to be successful, and when the resource marked as S in the K node does not exist, a new ciphertext attribute value FHV is randomly generated in the attribute interval again, and the search is repeated;
step S342: until the search of the type of resources is successful or the search times are over-limited and fail, the search algorithm is ended;
the step S4 further includes the steps of:
step S41: after releasing the resources in a resource routing ring mode, in a peer-to-peer cloud system, nodes with the same resource mark form the resource routing ring by storing the routing information of the same resource mark;
step S42: when the keyword interval searched by the user is [ V1, V2], if the keyword is plaintext, calculating a ciphertext interval [ FHV1, FHV2] by using a homomorphic encryption mechanism, and calculating an resource mark S;
step S43: according to the resource marking value S, searching a node N for storing the type of resources through a resource positioning algorithm, and comparing the search interval keywords in a resource routing loop by taking the node N as a starting node.
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