CN115086226A - Method and system for establishing anonymous link in anonymous network - Google Patents
Method and system for establishing anonymous link in anonymous network Download PDFInfo
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- CN115086226A CN115086226A CN202210602214.0A CN202210602214A CN115086226A CN 115086226 A CN115086226 A CN 115086226A CN 202210602214 A CN202210602214 A CN 202210602214A CN 115086226 A CN115086226 A CN 115086226A
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- H—ELECTRICITY
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- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L45/00—Routing or path finding of packets in data switching networks
- H04L45/12—Shortest path evaluation
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Abstract
The invention discloses a method and a system for establishing an anonymous link in an anonymous network, wherein the method comprises the following steps: after receiving a directory request sent by a client, a directory server in an anonymous network screens out information of nodes with the same bandwidth grade as the client from locally stored directory information according to the bandwidth grade of the client carried in the directory request and returns the information to the client; and the client selects a node from the information of the nodes returned by the directory server to establish an anonymous link. The invention can ensure the communication quality of the client.
Description
Technical Field
The invention relates to the technical field of computers, in particular to a method and a system for establishing an anonymous link in an anonymous network.
Background
When a user of an anonymous network joins the network, the user needs to request information of nodes existing in the network from the nodes in the network, and the request is called a directory request. A node that provides directory services for the entire network node is called a directory server. The node information in the entire network is called directory information.
Tor's directory services protocol requires a client to obtain up-to-date information for all relays in the network maintained by an authoritative directory server. The authoritative directory server is a set of trusted servers managed by the Tor community core members. Each period (one hour in Tor) the relay uploads its own information to the authoritative directory server, and the authoritative directory server votes for the relayed information. From these votes, the authoritative directory server computes a multi-signed consensus directory file representing their conclusions. And Tor, sending the whole directory information to each client. And then, the client determines the probability of each node being selected according to the bandwidth contribution value of each node in the whole network and the overall bandwidth proportion, so that the nodes are selected to establish an anonymous link.
However, with the existing method for establishing an anonymous link, the problem that the communication quality of the client is damaged often occurs.
Disclosure of Invention
In view of this, the present invention provides a method and a system for establishing an anonymous link in an anonymous network, which can ensure the communication quality of a client.
Based on the above purpose, the present invention provides a method for establishing an anonymous link in an anonymous network, which comprises:
after receiving a directory request sent by a client, a directory server in an anonymous network screens out information of nodes with the same bandwidth grade as the client from locally stored directory information according to the bandwidth grade of the client carried in the directory request and returns the information to the client;
and the client selects a node from the information of the nodes returned by the directory server to establish an anonymous link.
Further, before the directory server receives a directory request sent by a client, the method further includes:
and the directory server divides each node into different bandwidth grades according to the bandwidth contribution value of each node in the directory information.
Wherein, according to the bandwidth contribution value of each node in the directory information, dividing each node into different bandwidth grades specifically includes:
and for each node in the directory information, determining the bandwidth grade of the node according to the result obtained by taking the natural logarithm of the bandwidth contribution value of the node.
The invention also provides a method for establishing the anonymous link in the anonymous network, which comprises the following steps:
receiving a directory request sent by a client;
screening out nodes with the same bandwidth grade as the client from locally stored directory information according to the bandwidth grade of the client carried in the directory request;
and returning the information of the screened nodes to the client so that the client can select the nodes from the information to establish anonymous links.
The invention also provides a system for establishing the anonymous link in the anonymous network, which comprises the following steps:
the directory server is used for screening out information of nodes with the same bandwidth grade as that of the client from locally stored directory information according to the bandwidth grade of the client carried in the directory request after receiving the directory request sent by the client and returning the information to the client;
and the client is used for selecting the nodes from the information of the nodes returned by the directory server to establish the anonymous link.
The present invention also provides a directory server, comprising:
the directory request receiving module is used for determining the bandwidth level of the client carried in the directory request after receiving the directory request sent by the client;
and the node information screening module is used for screening out the information of the node with the same bandwidth grade as the client from the locally stored directory information and returning the information to the client.
The invention also provides an electronic device comprising a central processing unit, a signal processing and storage unit, and a computer program stored on the signal processing and storage unit and executable on the central processing unit, wherein the central processing unit performs the anonymous link establishment method in an anonymous network as described above.
In the technical scheme of the invention, after a directory server in an anonymous network receives a directory request sent by a client, according to the bandwidth level of the client carried in the directory request, the information of a node with the same bandwidth level as the client is screened out from locally stored directory information and returned to the client; and the client selects a node from the information of the nodes returned by the directory server to establish an anonymous link. The directory server only sends the information of the nodes with the bandwidth size close to that of the client to the client, so that the client can establish a link between the nodes with the same bandwidth level, the bandwidth of the link is ensured to be maintained at the bandwidth level of the client, the client is prevented from selecting the routing node with the minimum bandwidth contribution value as a hop in the link, and the communication quality of the client is ensured.
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 of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic diagram of bandwidth distribution of nodes in directory information according to an embodiment of the present invention;
fig. 2 is a schematic diagram of an architecture of an anonymous link establishment system in an anonymous network according to an embodiment of the present invention;
fig. 3 is a schematic diagram illustrating that a directory server sends node information with the same bandwidth level to a client according to an embodiment of the present invention;
fig. 4 is a flowchart of a method for establishing an anonymous link in an anonymous network according to an embodiment of the present invention;
fig. 5 is a block diagram of an internal structure of a directory server according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a hardware structure of an electronic device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to specific embodiments and the accompanying drawings.
It is to be noted that technical terms or scientific terms used in the embodiments of the present invention should have the ordinary meanings as understood by those having ordinary skill in the art to which the present disclosure belongs, unless otherwise defined. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
The inventor analyzes the problem of the communication quality damage of the client terminal in the existing method for establishing the anonymous link, finds that the existing directory server completely sends all directory information to the client terminal, and then selects the directory information according to the probability according to the bandwidth at the client terminal. This rule allows the client to select a routing node with a very small bandwidth contribution value as a hop in the link with a certain probability, resulting in that the size of the whole link bandwidth is limited by the routing node, and the communication quality of the client is impaired.
Based on the above analysis, the inventor of the present invention considers that the directory server can only send information of a node having a bandwidth size close to that of the client to the client, so that the client can establish a link between nodes having the same bandwidth level, ensure that the bandwidth of the link is maintained at the bandwidth level of the client, and avoid the client selecting a routing node having a very small bandwidth contribution value as a hop in the link, thereby ensuring the communication quality of the client.
Further, the inventor of the present invention analyzes the bandwidth information of the nodes in the directory information (i.e. consensus file) in the anonymous network, and finds that the bandwidth distribution of the nodes can be fitted by skewed distribution as shown in fig. 1, and the result obtained by taking the natural logarithm of the bandwidth of the nodes is between 0 and 13; therefore, in the technical scheme of the invention, when the node is subjected to bandwidth grade division, the bandwidth contributed by the node can be subjected to natural logarithm taking, then the result obtained by the natural logarithm taking is rounded, and the obtained integer is taken as the bandwidth grade of the node; the nodes are divided into different groups according to the bandwidth level, namely the nodes are grouped.
The technical solution of the embodiments of the present invention is described in detail below with reference to the accompanying drawings.
The invention provides an anonymous link establishing system in an anonymous network, the architecture of which is shown in figure 2, and the system comprises: a directory server 101 and a client 102.
The client 102 is configured to send a directory request to the directory server 101; the directory request carries the information of the bandwidth grade of the client;
the directory server 101 is configured to, after receiving a directory request sent by the client 102, parse a bandwidth level of the client from a current request; further screening out nodes with the same bandwidth grade as the client from the locally stored directory information; returning the information of the screened nodes to the client;
for example, as shown in fig. 3, the bandwidth level of the client carried in the directory request sent by the client 102 is a; if the directory server 101 stores information of a node with a bandwidth level of A, B, C from the local directory information, the directory server 101, upon receiving a directory request sent by the client 102, screens out information of a node with a bandwidth level of a from the locally stored directory information.
The client 102 selects a node from the information of the nodes returned by the directory server 101 to establish an anonymous link.
Before receiving a directory request sent by a client, the directory server 101 may further divide each node into different bandwidth levels according to the bandwidth contribution value of each node in the directory information: for each node in the directory information, determining the bandwidth grade of the node according to the result obtained after the bandwidth contribution value of the node is subjected to logarithm;
specifically, for each node in the directory information, the directory server 101 takes the natural logarithm of the bandwidth contribution value of the node, and rounds the result obtained after taking the natural logarithm to obtain the bandwidth level of the node. Assuming that the node bandwidth contribution value is 1800B, the calculated bandwidth level of the node is int (log) 1800 ＝7。
Thus, the directory server 101 may divide the nodes in the directory information into different groups according to the bandwidth levels, that is, implement grouping of the nodes. For example, the directory server 101 calculates a bandwidth level for each node in the directory information, and obtains a plurality of pieces of node information with bandwidth levels of 7, 8, and 9; further, the directory server 101 classifies the nodes in the directory information into the groups having the bandwidth levels of 7, 8, and 9, respectively, according to the bandwidth level of each node.
After the directory server 101 groups each node in the directory information according to the bandwidth level, a specific process of the method for establishing an anonymous link in an anonymous network according to the embodiment of the present invention, as shown in fig. 4, includes the following steps:
step S401: the client 102 sends a directory request to the directory server 101.
In this step, the client 102 sends a directory request to the directory server 101, where the directory request carries information of the bandwidth level of the client.
Step S402: the directory server 101 analyzes the received directory request, and determines the bandwidth level of the client according to the analysis result.
Step S403: the directory server 101 screens out information of a node having the same bandwidth level as the client from the locally stored directory information.
For example, assume that the client has a bandwidth rating of 7. The directory server 101 traverses the node information in the locally stored directory information, filters out the node information with bandwidth levels of 8 and 9, and only filters out the node information with bandwidth level of 7.
Step S404: the directory server 101 returns information of the screened nodes to the client 102.
Step S405: the client 102 selects a node from the information of the nodes returned by the directory server 101 to establish an anonymous link.
Based on the above method for establishing an anonymous link in an anonymous network, an internal structure of a directory server provided in an embodiment of the present invention is shown in fig. 5, and the directory server includes: a directory request receiving module 501 and a node information screening module 502;
the directory request receiving module 501 is configured to determine a bandwidth level of a client carried in a directory request after receiving the directory request sent by the client;
the node information screening module 502 is configured to screen out, from the locally stored directory information, information of nodes having the same bandwidth level as the client, and return the information to the client.
Further, a directory server provided in the embodiment of the present invention may further include: node bandwidth ranking module 503.
The node bandwidth level dividing module 503 is configured to divide each node into different bandwidth levels according to the bandwidth contribution value of each node in the directory information: for each node in the directory information, determining the bandwidth grade of the node according to the result obtained after the bandwidth contribution value of the node is subjected to logarithm;
specifically, for each node in the directory information, the node bandwidth level dividing module 503 takes the natural logarithm of the bandwidth contribution value of the node, and rounds the result obtained after taking the natural logarithm to obtain the bandwidth level of the node.
The method for implementing the functions of the modules in the directory server may refer to the method in each step of the flow shown in fig. 4, and is not described herein again.
Fig. 6 is a schematic diagram illustrating a more specific hardware structure of an electronic device according to this embodiment, where the electronic device may include: a processor 1010, a memory 1020, an input/output interface 1030, a communication interface 1040, and a bus 1050. Wherein the processor 1010, memory 1020, input/output interface 1030, and communication interface 1040 are communicatively coupled to each other within the device via bus 1050.
The processor 1010 may be implemented by a general-purpose CPU (Central Processing Unit), a microprocessor, an Application Specific Integrated Circuit (ASIC), or one or more Integrated circuits, and is configured to execute related programs to implement the method for establishing an anonymous link in an anonymous network provided in the embodiment of the present disclosure.
The Memory 1020 may be implemented in the form of a ROM (Read Only Memory), a RAM (Random Access Memory), a static storage device, a dynamic storage device, or the like. The memory 1020 may store an operating system and other application programs, and when the technical solution provided by the embodiments of the present specification is implemented by software or firmware, the relevant program codes are stored in the memory 1020 and called to be executed by the processor 1010.
The input/output interface 1030 is used for connecting an input/output module, and can be connected with a nonlinear receiver to receive information from the nonlinear receiver, so as to realize information input and output. The i/o module may be configured as a component in a device (not shown) or may be external to the device to provide a corresponding function. The input devices may include a keyboard, a mouse, a touch screen, a microphone, various sensors, etc., and the output devices may include a display, a speaker, a vibrator, an indicator light, etc.
The communication interface 1040 is used for connecting a communication module (not shown in the drawings) to implement communication interaction between the present device and other devices. The communication module can realize communication in a wired mode (such as USB, network cable and the like) and also can realize communication in a wireless mode (such as mobile network, WIFI, Bluetooth and the like).
The bus 1050 includes a path to transfer information between various components of the device, such as the processor 1010, memory 1020, input/output interface 1030, and communication interface 1040.
It should be noted that although the above-mentioned device only shows the processor 1010, the memory 1020, the input/output interface 1030, the communication interface 1040 and the bus 1050, in a specific implementation, the device may also include other components necessary for normal operation. In addition, those skilled in the art will appreciate that the above-described apparatus may also include only those components necessary to implement the embodiments of the present description, and not necessarily all of the components shown in the figures.
In the technical scheme of the invention, after a directory server in an anonymous network receives a directory request sent by a client, according to the bandwidth level of the client carried in the directory request, the information of a node with the same bandwidth level as the client is screened out from locally stored directory information and returned to the client; and the client selects a node from the information of the nodes returned by the directory server to establish an anonymous link. The directory server only sends the information of the nodes with the bandwidth size close to that of the client to the client, so that the client can establish a link between the nodes with the same bandwidth level, the bandwidth of the link is ensured to be maintained at the bandwidth level of the client, the client is prevented from selecting the routing node with the minimum bandwidth contribution value as a hop in the link, and the communication quality of the client is ensured.
Computer-readable media of the present embodiments, including both non-transitory and non-transitory, removable and non-removable media, may implement information storage by any method or technology. The information may be computer readable instructions, data structures, modules of a program, or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), Read Only Memory (ROM), Electrically Erasable Programmable Read Only Memory (EEPROM), flash memory or other memory technology, compact disc read only memory (CD-ROM), Digital Versatile Discs (DVD) or other optical storage, magnetic cassettes, magnetic tape magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information that can be accessed by a computing device.
Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, is limited to these examples; within the idea of the invention, also features in the above embodiments or in different embodiments may be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the invention as described above, which are not provided in detail for the sake of brevity.
In addition, well known power/ground connections to Integrated Circuit (IC) chips and other components may or may not be shown within the provided figures for simplicity of illustration and discussion, and so as not to obscure the invention. Furthermore, devices may be shown in block diagram form in order to avoid obscuring the invention, and also in view of the fact that specifics with respect to implementation of such block diagram devices are highly dependent upon the platform within which the present invention is to be implemented (i.e., specifics should be well within purview of one skilled in the art). Where specific details (e.g., circuits) are set forth in order to describe example embodiments of the invention, it should be apparent to one skilled in the art that the invention can be practiced without, or with variation of, these specific details. Accordingly, the description is to be regarded as illustrative instead of restrictive.
While the present invention has been described in conjunction with specific embodiments thereof, many alternatives, modifications, and variations of these embodiments will be apparent to those skilled in the art in light of the foregoing description. For example, other memory architectures (e.g., dynamic ram (dram)) may use the discussed embodiments.
The embodiments of the invention are intended to embrace all such alternatives, modifications and variances that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, substitutions, improvements and the like that may be made without departing from the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (10)
1. A method for establishing an anonymous link in an anonymous network is characterized by comprising the following steps:
after receiving a directory request sent by a client, a directory server in an anonymous network screens out information of nodes with the same bandwidth grade as the client from locally stored directory information according to the bandwidth grade of the client carried in the directory request and returns the information to the client;
and the client selects a node from the information of the nodes returned by the directory server to establish an anonymous link.
2. The method of claim 1, before the directory server receives the directory request sent by the client, further comprising:
and the directory server divides each node into different bandwidth grades according to the bandwidth contribution value of each node in the directory information.
3. The method according to claim 1, wherein the dividing the nodes into different bandwidth classes according to the bandwidth contribution value of each node in the directory information specifically comprises:
and for each node in the directory information, determining the bandwidth grade of the node according to the result obtained by taking the natural logarithm of the bandwidth contribution value of the node.
4. A method for establishing an anonymous link in an anonymous network is characterized by comprising the following steps:
receiving a directory request sent by a client;
screening out nodes with the same bandwidth grade as the client from locally stored directory information according to the bandwidth grade of the client carried in the directory request;
and returning the information of the screened nodes to the client so that the client can select the nodes from the information to establish anonymous links.
5. The method of claim 4, wherein before receiving the directory request sent by the client, the method further comprises:
and dividing each node into different bandwidth grades according to the bandwidth contribution value of each node in the directory information.
6. The method according to claim 5, wherein the dividing the nodes into different bandwidth classes according to the bandwidth contribution value of each node in the directory information specifically comprises:
and for each node in the directory information, determining the bandwidth grade of the node according to the result obtained by taking the natural logarithm of the bandwidth contribution value of the node.
7. An anonymous link establishment system in an anonymous network, comprising:
the directory server is used for screening out information of nodes with the same bandwidth grade as that of the client from locally stored directory information according to the bandwidth grade of the client carried in the directory request after receiving the directory request sent by the client and returning the information to the client;
and the client is used for selecting the nodes from the information of the nodes returned by the directory server to establish the anonymous link.
8. A directory server, comprising:
the directory request receiving module is used for determining the bandwidth level of the client carried in the directory request after receiving the directory request sent by the client;
and the node information screening module is used for screening out the information of the node with the same bandwidth grade as the client from the locally stored directory information and returning the information to the client.
9. The directory server of claim 8, further comprising:
and the node bandwidth grade dividing module is used for dividing each node into different bandwidth grades according to the bandwidth contribution value of each node in the directory information.
10. An electronic device comprising a central processing unit, a signal processing and storage unit, and a computer program stored on the signal processing and storage unit and executable on the central processing unit, characterized in that the central processing unit implements the method according to any of claims 1-6 when executing the program.
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