CN111859390B - Mimicry bracket device, defense method and defense architecture - Google Patents
Mimicry bracket device, defense method and defense architecture Download PDFInfo
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Abstract
The invention provides a mimic bracket device, comprising: the I/O interface module supports flow input and output; the flow distribution module is connected with the I/O interface module and is used for realizing the copy distribution of the flow; the two heterogeneous mimicry brackets are respectively connected with the flow distribution module, receive and process the flow copied and distributed by the flow distribution module, and calculate the output vector of each heterogeneous mimicry bracket; the confluence module is respectively connected with the two heterogeneous mimicry brackets and the I/0 interface module, receives the flow processed by the two heterogeneous mimicry brackets, and selects one output stream to be transmitted to the I/O interface module according to a preset selection instruction; and the flow control module is respectively connected with the two heterogeneous mimicry brackets and the confluence module, receives and compares the output vectors of the two heterogeneous mimicry brackets, and outputs a selection instruction to the confluence module according to a comparison result and a preset selection strategy so as to update the preset selection instruction.
Description
Technical Field
The invention relates to the field of mimicry defense, in particular to a mimicry bracket device, a defense method and a defense framework.
Background
The classic mimicry defense architecture is shown in fig. 1, and the architecture realizes mimicry modification of an executive body, and a user indirectly interacts with the executive body through mimicry brackets. The mimicry bracket consists of an input distribution and agent, an output agent and a resolver and refers to a protection boundary of a heterogeneous mimicry bracket set which possibly contains uncertain disturbance factors such as unknown vulnerability backdoor or virus trojan and the like. The mimicry architecture solves the problem of endogenous safety of the executive body, and converts the safety problem of the executive body with complex function into the safety problem of the mimicry bracket with simple function, so that the mimicry bracket needs to meet the characteristic that the loophole of the mimicry bracket is unreachable or unavailable, and the safety of the mimicry bracket is guaranteed. In addition, whether the mimicry bracket is reliable determines whether the executive is available, so that the reliability of the mimicry bracket needs to be improved.
In the past engineering practice, the function complexity of the mimicry bracket can be simplified and the attack surface can be reduced as far as possible, but the function of the mimicry bracket cannot be absolutely guaranteed to be realized without loopholes or virus trojans and the like. In addition, the mimicry bracket may also have a single point of failure that results in the unavailability of the service. Therefore, when the mimic bracket fails, the fault needs to be timely found and processed.
In order to solve the above problems, people always seek an ideal technical solution.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a mimicry bracket device, a defense method and a defense architecture.
In order to achieve the above object, a first aspect of the present invention provides a mimetic bracket device comprising:
the I/O interface module supports flow input and output;
the shunting module is connected with the I/O interface module and is used for realizing the copying and distribution of flow;
the two heterogeneous mimicry brackets are respectively connected with the flow distribution module, receive and process the flow copied and distributed by the flow distribution module, and calculate the output vector of each heterogeneous mimicry bracket;
the confluence module is respectively connected with the two heterogeneous mimicry brackets and the I/0 interface module, receives the flow processed by the two heterogeneous mimicry brackets, and selects an output stream to be transmitted to the I/O interface module according to a preset selection instruction;
and the flow control module is respectively connected with the two heterogeneous mimicry brackets and the confluence module, receives and compares the output vectors of the two heterogeneous mimicry brackets, and outputs a selection instruction to the confluence module according to a comparison result and a preset selection strategy so as to update the preset selection instruction.
Based on the above, the heterogeneous mimicry bracket includes an input distribution agent module, and the input distribution agent module is configured to copy and distribute traffic.
Based on the above, the heterogeneous mimicry bracket includes a sanction output agent module, and the sanction output agent module is configured to perform sanction output processing on the traffic.
Based on the above, the heterogeneous mimicry bracket includes an input distribution agent module and a decision output agent module, where the input distribution agent module is configured to copy and distribute traffic, and the decision output agent module is configured to perform decision output processing on traffic.
Based on the above, the I/O interface module includes an I/O interface module a and an I/O interface module B, the shunting module includes a shunting module a and a shunting module B, the merging module includes a merging module a and a merging module B, the I/O interface module a is connected with the shunting module a and the merging module B, respectively, and the I/O interface module B is connected with the merging module a and the shunting module B, respectively.
The second aspect of the invention provides a mimicry defense method, which comprises the following steps:
the flow of the I/O interface module reaches the flow distribution module, and the flow distribution module copies two flows with the same flow and sends the two flows to two heterogeneous mimicry brackets;
the two heterogeneous mimicry brackets are used for receiving and processing the flow copied and distributed by the flow splitting module, sending an output flow to the flow merging module after finishing data processing, and sending an output vector to the flow control module;
the confluence module receives the flow processed by the two heterogeneous mimicry brackets, and selects an output flow to be transmitted to the I/O interface module according to a preset selection instruction;
and the flow control module receives and compares the output vectors of the two heterogeneous mimicry brackets, and outputs a selection instruction to the confluence module according to a comparison result and a preset selection strategy so as to update the preset selection instruction.
The third aspect of the invention provides a mimicry defense architecture, which comprises a heterogeneous execution body set, a first mimicry bracket device and a second mimicry bracket device, wherein the first mimicry bracket device and the second mimicry bracket device are respectively connected with the heterogeneous execution body set, the heterogeneous mimicry bracket of the first mimicry bracket device comprises an input distribution agent module, and the heterogeneous mimicry bracket of the second mimicry bracket device comprises an arbitration output agent module.
The invention provides a mimicry defense architecture which comprises a heterogeneous execution corpus and a mimicry bracket device, wherein the heterogeneous mimicry bracket of the mimicry bracket device comprises an input distribution agent module and an arbitration output agent module.
Compared with the prior art, the invention has prominent substantive features and remarkable progress, particularly,
1. the scheme of the invention realizes the separation of the input stream and the output stream at the I/O interface through the respective processing of the flow dividing module, the flow converging module and the flow control module.
2. The mimicry bracket device realizes the processing mode of leading in a production line in the key control link of the mimicry system, segments the control function and forms a single-line or one-way connection mechanism independent of the absolute credibility of the control segment to control the potential influence and possible diffusion range of unknown threats. The processing flow of the pipeline can cause the accessibility obstacle of an attack channel, make the construction or maintenance of the information transmission or virus Trojan uploading mechanism required by the matched attack difficult, and finally cause the situation that even the loophole exists in the mimicry bracket device, the loophole is difficult to utilize.
3. The confluence module can select an output stream of a certain heterogeneous mimicry bracket to output without waiting for a selection instruction of the flow control module; the flow control module is constantly in a verification state, and when a verification result is abnormal, the flow control module outputs a new selection instruction to the confluence module so as to influence subsequent output. When the verification result is abnormal, the flow control module outputs a new selection instruction to the confluence module to further influence subsequent output, so that the problem that when a certain mimicry bracket is jointly attacked or service is unavailable due to self single-point fault can be effectively solved, the abnormality is timely found, and the mimicry bracket which is not attacked by the coordination mode or the mimicry bracket without self single-point fault is selected for outputting the result when the simulated bracket is used next time, so that the safety of the mimicry bracket is ensured, and the safety of the heterogeneous executive body is improved.
4. By programming and solidifying the logic functions of the shunting module, the converging module and the flow control module by hardware, the loophole can not be injected, and the safety of the mimicry bracket device is improved.
5. The mimicry defense architecture can realize unidirectional input, unidirectional output and unidirectional internal transmission of data streams in the mimicry system, so that the mimicry system obtains the security gain of a unidirectional contact mechanism.
Drawings
FIG. 1 is a diagram of a classical mimicry defense architecture.
FIG. 2 is an architecture diagram of a mimic bracket device according to embodiment 1 of the present invention.
FIG. 3 is a logic diagram of the pseudo bracket device according to embodiment 2 of the present invention.
FIG. 4 is a flowchart of the mimicry defense method according to embodiment 3 of the present invention.
Detailed Description
The technical solution of the present invention is further described in detail by the following embodiments.
Example 1
As shown in fig. 2, the present embodiment provides a mimetic bracket device, including:
the I/O interface module supports flow input and output;
the flow distribution module is connected with the I/O interface module and is used for realizing the copy distribution of the flow;
the two heterogeneous mimicry brackets are respectively connected with the flow distribution module, receive and process the flow copied and distributed by the flow distribution module, and calculate the output vector of each heterogeneous mimicry bracket;
the confluence module is respectively connected with the two heterogeneous mimicry brackets and the I/0 interface module, receives the flow processed by the two heterogeneous mimicry brackets, and selects an output stream to be transmitted to the I/O interface module according to a preset selection instruction;
and the flow control module is respectively connected with the two heterogeneous mimicry brackets and the confluence module, receives and compares the output vectors of the two heterogeneous mimicry brackets, and outputs a selection instruction to the confluence module according to a comparison result and a preset selection strategy so as to update the preset selection instruction.
Specifically, the preset selection policy includes: when the comparison result is consistent, selecting the currently selected heterogeneous mimicry bracket as a next selected heterogeneous mimicry bracket, and outputting a selection instruction; when the comparison result is inconsistent, selecting another isomeric mimicry bracket as the next selected isomeric mimicry bracket, and outputting a selection instruction.
In a specific implementation process, in the specific implementation process, the heterogeneous mimicry bracket comprises an input distribution agent module, and the input distribution agent module is used for copying and distributing traffic; or the heterogeneous mimicry bracket comprises an arbitration output agent module which is used for carrying out arbitration output processing on the traffic.
The mimicry bracket device of the embodiment separates the flow and the output flow at the I/O interface by respectively processing the flow dividing module, the flow converging module and the flow control module; meanwhile, the confluence module can select an output stream of a certain heterogeneous mimicry bracket to output without waiting for a selection instruction of the flow control module; the flow control module is constantly in a verification state, and when a verification result is abnormal, the flow control module outputs a new selection instruction to the confluence module so as to influence subsequent output; the embodiment also realizes a processing mode of leading in a production line in a key control link of the mimicry system, so that the control function is segmented, and a single-line or one-way connection mechanism which is independent of the absolute credibility of the control segment is formed to control the potential influence and the possible diffusion range of unknown threats. The processing flow of the pipeline can cause accessibility obstacles of attack channels, make the construction or maintenance of the required information transfer or virus Trojan uploading mechanism of the coordinated attack difficult, and finally cause the situation that even though the loophole exists in the mimicry bracket device, the loophole is difficult to utilize.
The mimicry bracket device in this embodiment may be implemented in pure hardware, that is, the splitting module uses an optical fiber splitter, the converging module uses an optical switch, and the flow control module uses an FPGA.
The mimic bracket device in this embodiment may also be implemented in a hardware logic programming manner during specific implementation, that is, the shunting module, the converging module, and the flow control module are implemented based on FPGA hardware programmable logic and are solidified in an FPGA. Logic programming based on FPGA belongs to hardware description language, logic is solidified, attack script can not be injected, and safety of the mimic bracket device is improved.
Example 2
The present embodiment is different from embodiment 1 in that: as shown in fig. 3, the heterogeneous mimicry bracket includes an input distribution agent module and an arbitration output agent module, where the input distribution agent module is configured to perform duplicate distribution processing on traffic, and the arbitration output agent module is configured to perform arbitration output processing on traffic;
the I/O interface module comprises an I/O interface module A and an I/O interface module B, the shunting module comprises a shunting module A and a shunting module B, the converging module comprises a converging module A and a converging module B, the I/O interface module A is respectively connected with the shunting module A and the converging module B, and the I/O interface module B is respectively connected with the converging module A and the shunting module B.
In this embodiment, an input distribution agent module and a resolution output agent module are integrated on a chip or a module, and the input distribution agent module and the resolution output agent module are respectively connected through the merging module a, the merging module B, the splitting module a and the splitting module B, so that the security of the input distribution agent function and the security of the resolution output agent function can be ensured simultaneously through a heterogeneous mimicry bracket device.
Example 3
As shown in fig. 4, the present embodiment provides a mimicry defense method, which includes the following steps:
the flow of the I/O interface module reaches the flow dividing module, the flow dividing module copies two flows with the same flow as one model and sends the two flows to the two heterogeneous mimicry brackets;
the two heterogeneous mimicry brackets are used for receiving and processing the flow copied and distributed by the flow dividing module, sending an output flow to the flow converging module after finishing data processing, and sending an output vector to the flow control module;
the flow converging module receives the flow processed by the two heterogeneous mimicry brackets, and selects an output flow to be transmitted to the I/O interface module according to a preset selection instruction;
and the flow control module receives and compares the output vectors of the two heterogeneous mimicry brackets, and outputs a selection instruction to the confluence module according to a comparison result and a preset selection strategy so as to update the preset selection instruction.
Example 4
The embodiment provides a mimicry defense architecture which comprises a heterogeneous executive body set, a first mimicry bracket device and a second mimicry bracket device, wherein the first mimicry bracket device and the second mimicry bracket device are respectively connected with the heterogeneous executive body set, the first mimicry bracket device and the second mimicry bracket device are the mimicry bracket devices in the embodiment 1, the first mimicry bracket comprises an input distribution agent module, and the second mimicry bracket device comprises an arbitration output agent module.
Example 5
The embodiment provides a mimicry defense architecture which comprises a heterogeneous executive body set and a mimicry bracket device, wherein the mimicry bracket device is the mimicry bracket device in the embodiment 2.
Finally, it should be noted that the above examples are only used to illustrate the technical solutions of the present invention and not to limit the same; although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that: modifications to the specific embodiments of the invention or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the invention, it is intended to cover all modifications within the scope of the invention as claimed.
Claims (10)
1. A mimetic bracket device comprising:
the I/O interface module supports flow input and output;
the shunting module is connected with the I/O interface module and is used for realizing the copying and distribution of flow;
the two heterogeneous mimicry brackets are respectively connected with the flow distribution module, receive and process the flow copied and distributed by the flow distribution module, and calculate the output vector of each heterogeneous mimicry bracket;
the confluence module is respectively connected with the two heterogeneous mimicry brackets and the I/O interface module, receives the flow processed by the two heterogeneous mimicry brackets, and selects an output stream to be transmitted to the I/O interface module according to a preset selection instruction;
the flow control module is respectively connected with the two heterogeneous mimicry brackets and the confluence module, receives and compares the output vectors of the two heterogeneous mimicry brackets, and outputs a selection instruction to the confluence module according to a comparison result and a preset selection strategy so as to update the preset selection instruction;
wherein the preset selection policy comprises: when the comparison result is consistent, selecting the currently selected heterogeneous mimicry bracket as a next selected heterogeneous mimicry bracket, and outputting a selection instruction; when the comparison result is inconsistent, another isomeric mimicry bracket is selected as the next selected isomeric mimicry bracket, and a selection instruction is output.
2. The mimetic bracket device according to claim 1, wherein: the heterogeneous mimicry bracket comprises an input distribution agent module, and the input distribution agent module is used for carrying out copy distribution processing on the flow.
3. The mimetic bracket device according to claim 1, wherein: the heterogeneous mimicry bracket comprises an arbitration output agent module which is used for carrying out arbitration output processing on the traffic.
4. The mimetic bracket device according to claim 1, wherein: the heterogeneous mimicry bracket comprises an input distribution agent module and a decision output agent module, wherein the input distribution agent module is used for copying and distributing the traffic, and the decision output agent module is used for performing decision output processing on the traffic.
5. The mimic bracket device of claim 4, wherein: the I/O interface module comprises an I/O interface module A and an I/O interface module B, the shunting module comprises a shunting module A and a shunting module B, the confluence module comprises a confluence module A and a confluence module B, the I/O interface module A is respectively connected with the shunting module A and the confluence module B, and the I/O interface module B is respectively connected with the confluence module A and the shunting module B.
6. The mimetic bracket device according to any one of claims 1 to 5, characterized in that: the flow splitting module adopts an optical fiber splitter, the converging module adopts an optical switch, and the flow control module adopts an FPGA.
7. The mimetic bracket device according to any one of claims 1 to 5, characterized in that: the flow distribution module, the flow converging module and the flow control module are realized based on FPGA hardware programmable logic and are solidified in the FPGA.
8. A mimicry defense method, characterized by:
the flow of the I/O interface module reaches the flow dividing module, the flow dividing module copies two flows with the same flow as one model and sends the two flows to the two heterogeneous mimicry brackets;
the two heterogeneous mimicry brackets are used for receiving and processing the flow copied and distributed by the flow dividing module, sending an output flow to the flow converging module after finishing data processing, and sending an output vector to the flow control module;
the confluence module receives the flow processed by the two heterogeneous mimicry brackets, and selects an output flow to be transmitted to the I/O interface module according to a preset selection instruction;
the flow control module receives and compares the output vectors of the two heterogeneous mimicry brackets, and outputs a selection instruction to the confluence module according to a comparison result and a preset selection strategy so as to update the preset selection instruction;
wherein the preset selection policy comprises: when the comparison result is consistent, selecting the currently selected heterogeneous mimicry bracket as the next selected heterogeneous mimicry bracket, and outputting a selection instruction; when the comparison result is inconsistent, another isomeric mimicry bracket is selected as the next selected isomeric mimicry bracket, and a selection instruction is output.
9. A mimicry defense architecture, characterized by: the device comprises a heterogeneous execution body set, a first mimicry bracket device and a second mimicry bracket device, wherein the first mimicry bracket device and the second mimicry bracket device are respectively connected with the heterogeneous execution body set, wherein the first mimicry bracket device is the mimicry bracket device of claim 2, and the second mimicry bracket device is the mimicry bracket device of claim 3.
10. A mimicry defense architecture, characterized by: comprising a heterogeneous execution set and a pseudo-bracket device connected with the heterogeneous execution set, wherein the pseudo-bracket device is the pseudo-bracket device of claim 4 or 5.
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