CN107888561B - Civil aircraft-oriented safety service combination system - Google Patents

Civil aircraft-oriented safety service combination system Download PDF

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CN107888561B
CN107888561B CN201710952927.9A CN201710952927A CN107888561B CN 107888561 B CN107888561 B CN 107888561B CN 201710952927 A CN201710952927 A CN 201710952927A CN 107888561 B CN107888561 B CN 107888561B
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CN107888561A (en
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孙聪
魏大卫
张军才
周斌
马建峰
马晓晨
习宁
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Xidian University
Xian Aeronautics Computing Technique Research Institute of AVIC
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
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Abstract

The invention discloses a civil aircraft-oriented safety service combination system, which mainly solves the problem of poor safety of the business process in the prior art and comprises four subsystems, wherein an airborne database subsystem stores an airborne service number, an airborne service name, a QoS function attribute value and a QoS security risk attribute value and provides query service for an airborne service discovery subsystem; the airborne service discovery subsystem selects an airborne service set with a specific function from the airborne database subsystem and outputs the airborne service set to the airborne service selection subsystem; the airborne service selection subsystem selects airborne services with the minimum security risk value in each airborne service set and outputs the airborne services to the airborne service arrangement subsystem; and the airborne service arranging subsystem is used for arranging the airborne service provided by the airborne service selecting subsystem. The method and the system improve the safety of the business process of the civil aircraft information system under the condition of meeting the functional requirements of the civil aircraft.

Description

Civil aircraft-oriented safety service combination system
Technical Field
The invention belongs to the technical field of information security, and particularly relates to a security service combination system which can be used for an airborne information system of a civil aircraft.
Background
With the progress of technology, the civil aircraft can be applied to an electronic information system in a large range, and the real-time exchange and update of on-board electronic data such as flight data, voice data, video data and the like are realized. In civil aircraft applying an electronic information system, a plurality of onboard services including security services are responsible for realizing real-time exchange and update of onboard electronic data. According to the different safety levels inside the electronic airplane, the onboard services are divided into four domains: a control domain, an information and services domain, an information and entertainment services domain, and a passenger device domain. In a control domain and an information and service domain, airborne services need to have security attributes, such as integrity attack resistance, DoS attack resistance and electromagnetic attack resistance; in the information and entertainment services domain as well as in the passenger device domain, on-board services need to have business security attributes such as availability, non-repudiation. However, with the further development of computer technology and electronic airplane concept, the number of onboard services becomes increasingly huge, which brings great challenges to the secondary development and maintenance of onboard services for developers.
The above challenges make it very difficult to develop a highly available, reliable, secure and robust business process. The business process refers to a group of ordered airborne services obtained by combining a plurality of airborne services according to a specific combination mode by a developer in order to realize a specific function. In the design process of the business process, when a developer selects a service with a certain function, the developer faces various candidate COTS application services, and the developer needs to select an airborne service which can complete the required function and has the best safety.
Under the service-oriented architecture SOA, the service abstraction system abstracts the application program into application service, the enterprise service bus manages the application service in the system, and the service combination system selects and manages the application service by adopting a specific algorithm. Under the environment of a civil aircraft airborne information system, the service-oriented architecture has remarkable advantages in the aspects of ensuring the availability, reliability, safety, robustness and the like of a business process.
At present, researchers have designed a large number of service composition systems and corresponding composition methods based on service-oriented architectures. The chinese patent application with application number 201310200474.6 proposes "a Web service combination method and system" to solve the problem that the existing Web service combination method cannot adapt to the next generation of Web services. Chinese patent application No. 201110430423.3 proposes "an application service combination method, apparatus and system" to satisfy the requirement of the mobile terminal user for application services with complex functions. Chinese patent application No. 200910238520.5 discloses an "automatic service composition system and method" to reduce the time and calculation overhead of searching for appropriate services in the service composition process and ensure the QoS of the composition result to be optimal.
However, the service combination system and the corresponding combination method are all designed in a general scene, and the high security requirement of the civil aircraft information system is not considered, so that the security of the business process of the civil aircraft information system cannot be effectively measured, and a great potential safety hazard exists.
Disclosure of Invention
The invention aims to provide a civil aircraft-oriented safety service combination system aiming at the defects of the prior art so as to effectively combine related airborne services and improve the safety of business processes of a civil aircraft information system under the condition of meeting the functional requirements of a civil aircraft.
In order to achieve the above object, the present invention provides a combination system of security services for civil aircraft onboard information system, comprising:
airborne database subsystem: the system comprises a platform, a platform server, a;
the airborne service discovery subsystem: the system comprises an airborne database subsystem, an airborne service selection subsystem, a service selection subsystem and a service selection subsystem, wherein the airborne database subsystem is used for selecting all airborne services meeting the functions required by development according to information in the airborne database subsystem, and classifying the airborne services with the same functions into an airborne service set to form a plurality of airborne service sets which are output to the airborne service selection subsystem;
the airborne service selection subsystem: the system comprises an airborne service discovery subsystem, an airborne service orchestration subsystem and a server, wherein the airborne service discovery subsystem is used for receiving airborne service sets output by the airborne service discovery subsystem, selecting airborne services with minimum security risk values from each airborne service set, and outputting the airborne services to the airborne service orchestration subsystem;
the onboard service arranging subsystem: the onboard service selection subsystem is used for scheduling the onboard service output by the onboard service selection subsystem;
the airborne database subsystem, the airborne service discovery subsystem, the airborne service selection subsystem and the airborne service arrangement subsystem are located in the same airborne information network.
The invention has the following advantages:
1. the invention carries out security risk assessment on the airborne service in the process of selecting the airborne service, so that the airborne service applied to the business process meets the airworthiness requirement, and effectively reduces the possibility that the business process is damaged by the security loophole of the airborne service due to artificial threat, environmental threat and technical threat under the environment of the civil aircraft airborne information system.
2. In the environment of civil aircraft airborne information systems, the combination of airborne services is realized by adopting a service-oriented architecture, so that the reuse rate of the airborne services is effectively improved, and the cost for developing novel business processes is reduced.
3. Compared with the prior patent, the method measures the safety of the business process of the civil aircraft information system, and ensures the safety and reliability of the civil aircraft information system.
Drawings
FIG. 1 is an architecture diagram of the security services combination system of the present invention;
FIG. 2 is a flow chart of the operation of the on-board service discovery subsystem of the present invention;
fig. 3 is a flow chart of the operation of the on-board service selection subsystem of the present invention.
Detailed Description
The present invention is described in further detail below with reference to the attached drawings.
Referring to fig. 1, the present invention includes an onboard database subsystem 1, an onboard service discovery subsystem 2, an onboard service selection subsystem 3, and an onboard service orchestration subsystem 4. The airborne database subsystem 1 comprises a QoS function attribute generation module 11, a QoS security risk attribute generation module 12 and a database module 13; the onboard service discovery subsystem 2 comprises a mapping relation generation module 21 and a service discovery engine 22; the onboard service selection subsystem 3 comprises a security risk calculation module 31 and a service selection engine 32, wherein:
the QoS function attribute generation module 11 is configured to provide an interface for formally describing a QoS function attribute value of a computer-mounted service, and calculate input data of the computer-mounted service as the QoS function attribute value, where the input data of the computer-mounted service includes a response time of the computer-mounted service, a quoted price of the computer-mounted service, and a function of the computer-mounted service, and based on the input data, the QoS function attribute includes a service response time attribute RT, a service charging attribute SC, and a service function attribute SF, a value of the service charging attribute is provided by a provider of the service, and the service response time attribute RT and the service function attribute SF are defined and calculated according to the following formulas:
service response time:
Figure BDA0001433267750000031
wherein T isiThe ith onboard service response time, n is the number of collected response time samples;
service functions: SF ═ qj|qj∈ {0,1},0 ≦ j < a }, wherein q isjRepresents the jth function of the airborne service, when q isjWhen 0, it means that the onboard service does not have jth function, and when q isjWhen the number is 1, the airborne service is represented to have the jth function, and a is the total number of the functions;
the QoS security risk attribute generating module 12 is configured to calculate a QoS security risk attribute value of an airborne service according to input data of the QoS security risk attribute generating module, where the input data of the QoS security risk attribute generating module includes:
a. correct input data t in airborne service test caseiAnd erroneous input data ui；
b. Information of user in airborne service test caseOutput data t of the tasko；
c. The maximum number C (u) of the data packets and the network connections u processed by the computer CPU in which the onboard service is located in unit time, the maximum number A (u) of the data packets and the network connections u stored in the memory, and the maximum number H (u) of the data packets and the network connections u stored in the hard disk;
d. the intensity W (-) of the maximum electromagnetic interference borne by each element in the computer where the onboard service is located;
e. the method comprises the following steps that (1) airborne service failure time FT, airborne service available time UT, an input parameter range G received by airborne service and an execution success rate P (z) under corresponding input z are obtained;
f. a digital certificate sig of the airborne service user;
based on the input data, the QoS security risk attributes include:
security attributes, namely integrity attack resistance DC, DoS attack resistance DD and electromagnetic attack resistance DG;
service security attributes, i.e. availability UF, non-repudiation DN,
the QoS security risk attribute calculation formula is as follows:
integrity attack resistance:
Figure BDA0001433267750000041
wherein t isiRepresenting correct input data, u, in airborne service test casesiInput data, t, representing errors in airborne service test casesoOutput data representing trust by the user in airborne service test cases, F (t)i) Indicating on-board service at input tiOutput in case F (t)i,ui) Indicating on-board service at input tiAnd uiOutput in case F (t)o|ti) Is represented at the input of tiIn the case, the portion of the output of the onboard service that is trusted by the user;
DoS attack resistance:
Figure BDA0001433267750000042
wherein u is a packet or a netNetwork connection, D is a data packet and network connection set, C (u) represents the maximum number of processing data packets and network connection of a CPU of the machine in unit time, A (u) represents the maximum number of storing data packets and network connection in a memory of the machine, and H (u) represents the maximum number of storing data packets and network connection in a hard disk of the machine;
anti-electromagnetic interference capability:
Figure BDA0001433267750000043
wherein J is the set of airborne services that can be interfered by electromagnetic signals, and W (e) represents the maximum electromagnetic interference strength that the airborne services that can be interfered by electromagnetic signals e can bear;
availability:
Figure BDA0001433267750000044
wherein FT is the airborne service failure time, UT is the airborne service available time, G is the range of the airborne service input parameter, and P (z) is the success rate of the airborne service execution under a certain input z;
non-repudiation: DN ═ K (sig), where sig is the digital certificate of the airborne service user, K is the mapping K: sig → x, x ∈ Z, where Z is the set of positive integers.
The database module 13, which has two functions: the system is used for providing a writing interface for a QoS function attribute generation module 11 and a QoS security risk attribute generation module 12 and providing an inquiry interface for an airborne service discovery subsystem 2; the second record is used for storing a plurality of records, and each record comprises an airborne service number num, an airborne service name n and a corresponding QoS function attribute vector v ═ v { (v) }1,v2,L,vq,L,vq1And QoS security risk attribute vector b ═ b1,b2,L,bp,L,bp1In which v isqQ is equal to or greater than 1 and equal to or less than q1, b represents the qth QoS function attributepRepresents the p-th QoS security risk attribute, p is more than or equal to 1 and less than or equal to p1, q1 represents the total number of QoS function attributes, and p1 represents the total number of QoS security risk attributes.
The mapping relation generator 21 is configured to provide a mapping relation corresponding to the mapping rule to the service discovery engine 22, and when the system runs, the mapping relation generator 21 reads the mapping rule provided by the user, calculates the mapping relation of each mapping rule by using a zade method, and outputs the mapping relation to the service discovery engine 22.
And the service discovery engine 22 is configured to obtain a plurality of airborne service sets from the database module 13, select a plurality of airborne service sets meeting the mapping relationship according to the mapping relationship, and output the selected airborne service sets to the airborne service selection subsystem 3.
Referring to fig. 2, the onboard service discovery subsystem 2 works as follows:
step 1, establishing a tuple set of airborne service information.
1.1) the service discovery engine 22 collects the onboard service number i, the onboard service name n and its corresponding QoS function attribute vector v ═ v { v } stored in the database module 131,v2,L,vq,L,vq1And QoS security risk attribute vector b ═ b1,b2,L,bp,L,bp1In which v isqQ is equal to or greater than 1 and equal to or less than q1, b represents the qth QoS function attributepRepresents the p-th QoS security risk attribute, p is more than or equal to 1 and less than or equal to p1, q1 represents the total number of QoS function attributes, and p1 represents the total number of QoS security risk attributes;
1.2) the service discovery engine 22 standardizes each component value in the collected QoS function attribute vector V and QoS security risk attribute vector B to obtain a standardized QoS function attribute vector V and QoS security risk attribute vector B, wherein z1 is the number of elements of the standardized QoS function attribute vector, x1 is the number of elements of the standardized QoS security risk attribute vector, wherein VzDenotes the z-th normalized QoS function Attribute, BxRepresents the x1 th standardized QoS Security Risk Attribute:
Figure BDA0001433267750000051
Figure BDA0001433267750000061
forming a quadruple S ═ num, n, V, B >;
1.3) the service discovery engine 22 collects all the quadruples S in the onboard database subsystem, resulting in a quadruple set AA ═ SkAnd l 1 is less than or equal to k and less than or equal to c, wherein c is the total number of the quadruples.
Step 2, the mapping relationship generating module 21 reads a series of mapping rules defined by the user, and calculates the mapping relationship set R ═ R { R ] of each mapping rule by using the zade methodiiI 1 ≦ ii ≦ m, where m is the total number of mappings, RiiRepresenting the mapping relationship of the ii mapping rule.
The defined mapping rule format is:
v ' → N, wherein V ' ═ V 'i2I1 ≦ i2 ≦ d is the set of QoS function attribute vectors, N ≦ Nj2L 1 & lt j2 & lt d) is a set of airborne service sets, wherein the elements of the airborne service sets are airborne service numbers, V'i2For the i2 th QoS function attribute vector, Nj2Representing the j2 th airborne service set, d is the total number of mapping rules, and the total number of mapping rules and the total number of mapping relations are equal;
step 3, the service discovery engine 22 selects the onboard service set of the required business function.
3.1) when the service discovery engine 22 obtains the QoS function attribute vector of an airborne service function in the service process provided by the user, executing the step 3.2), otherwise, turning to the step 3.5);
3.2) the service discovery engine 22 utilizes the QoS function attribute vector v' of an airborne service function in the service process provided by the user to respectively calculate with each mapping relation in the mapping relation set R to obtain m result vectors
Figure BDA0001433267750000062
Where m is the total number of mappings, Ri3For the i3 th mapping in the set of mappings R,
Figure BDA0001433267750000063
a calculation symbol for the zade method;
3.3) the service discovery Engine 22 computes the result vector ri3With on-board servicesThe intersection I of each element in set N of sets ═ { I ═ Ii4|Ii4＝ri4∩Ni4I4 < e > 1, where e is the total number of intersections, the value is equal to the total number of mappings, and Ii4Is the I4 th element in the intersection I, ri4Is a result vector ri3The i4 th element, Ni4Is the i4 th element in set N of the airborne service set;
3.4) the service discovery Engine 22 finds the element I with the largest cardinality of elements within the intersection Ik1K1 is more than or equal to 1 and less than or equal to e, and find and calculate the intersection Ik1Airborne service set Nk1D is equal to or greater than 1 and equal to or greater than k1, d is the total number of the mapping rules, and the step 3.1) is returned;
3.5) the service discovery engine 22 collects all the onboard service sets calculated in step 3.4) and forms a set N '═ { N'i5L 1 ≦ i5 ≦ f }, where f is the total number of elements of the set, N ″.i5Represents the i5 th airborne service set found in step 3.4);
and the airborne service selection subsystem 3 is used for selecting the airborne service which is arranged by the airborne service arrangement subsystem. When the service combination system operates, the security risk calculation module 31 reads a plurality of onboard service sets output by the service discovery engine 22, and outputs the calculation result to the service selection engine 32, and the service selection engine 32 outputs the selected onboard service sets to the onboard service orchestration submodule 4.
Referring to fig. 3, the onboard service selection subsystem 3 works as follows:
firstly, the security risk calculation module 31 takes out an airborne service set from the service discovery engine each time, and executes the second step, otherwise, the service selection engine 32 outputs the temporarily stored airborne service to the airborne service arrangement subsystem 4;
secondly, calculating the security risk value of each airborne service in the airborne service set taken out in the first step
Figure BDA0001433267750000071
Wherein EhRepresents the security risk value of the h-th airborne service, and l is an airborne service set Ni'5Total number of on-board services, wgThe g-th weight is expressed and is given by civil aviation experts according to experience, BgFor the g component of the airborne service QoS security risk attribute vector, p1 is the total number of the airborne service QoS security risk attribute vectors;
step three, the service selection engine 32 finds out the airborne service with the minimum security risk value in the step two, temporarily stores the airborne service, and turns to the step one;
the onboard service arranging subsystem 4 is used for arranging the onboard services by using a business process execution language BPEL, and when the system runs, the onboard service arranging subsystem 4 reads an onboard service set output by the service selection engine 32 and arranges the onboard services in the set according to a business process designed by a user to realize a specific business function.
The foregoing description is only an example of the present invention and is not intended to limit the invention, so that it will be apparent to those skilled in the art that various modifications and variations in form and detail can be made therein without departing from the spirit and scope of the invention.

Claims (10)

1. A civil aircraft-oriented safety services combination system, comprising:
airborne database subsystem: the system comprises a platform, a platform server, a;
the airborne service discovery subsystem: the system comprises an airborne database subsystem, an airborne service selection subsystem, a service selection subsystem and a service selection subsystem, wherein the airborne database subsystem is used for selecting all airborne services meeting the functions required by development according to information in the airborne database subsystem, and classifying the airborne services with the same functions into an airborne service set to form a plurality of airborne service sets which are output to the airborne service selection subsystem;
the airborne service selection subsystem: the system comprises an airborne service discovery subsystem, an airborne service orchestration subsystem and a server, wherein the airborne service discovery subsystem is used for receiving airborne service sets output by the airborne service discovery subsystem, selecting airborne services with minimum security risk values from each airborne service set, and outputting the airborne services to the airborne service orchestration subsystem;
the onboard service arranging subsystem: the onboard service selection subsystem is used for scheduling the onboard service output by the onboard service selection subsystem;
the airborne database subsystem, the airborne service discovery subsystem, the airborne service selection subsystem and the airborne service arrangement subsystem are located in the same airborne information network.
2. The system of claim 1, wherein said onboard database subsystem comprises:
the QoS function attribute generation module is used for receiving external input, calculating a QoS function attribute value according to the external input and outputting the value to the database module;
the QoS security risk attribute generation module is used for receiving external input, calculating a QoS security risk attribute value according to the external input and outputting the value to the database module;
and the database module is used for providing a writing interface for the QoS function attribute generation module and the QoS security risk attribute generation module and providing a query interface for the airborne service discovery subsystem.
3. The system of claim 1, wherein the onboard service discovery subsystem comprises:
the mapping relation generating module is used for receiving the mapping rules provided by the user and outputting the mapping relation to the service discovery engine;
and the service discovery engine is used for receiving the mapping relation and the QoS function attribute vectors of the plurality of airborne business functions and outputting the discovered airborne service set to the airborne service selection subsystem.
4. The system of claim 1, wherein said on-board service selection subsystem comprises:
the security risk calculation module is used for receiving the airborne service set output by the service discovery engine, calculating security risk values of all services in the airborne service set, and outputting all services in the airborne service set and the security risk values of the services to the service selection engine;
and the service selection engine is used for receiving the output of the security risk calculation module, selecting an airborne service with the minimum security risk value from each airborne service set, and outputting the airborne service to the airborne service arrangement subsystem.
5. The system according to claim 2, wherein the QoS function attribute generating module generates QoS function attributes including: service response time, service charges and service functions, the service charges being provided by the provider of the on-board service.
6. The system of claim 5, wherein the service response time and the service function are calculated according to the following formula:
service response time:
Figure FDA0002512379800000021
wherein T isiThe ith airborne service response time is obtained, and n is the sampling times of the airborne service response time;
service functions: SF ═ qj|qj∈ {0,1},0 ≦ j < a }, wherein q isjRepresents the jth function of the airborne service, a being the total number of functions, when q isjWhen 0, it means that the onboard service does not have jth function, and when q isjWhen the number is 1, the onboard service is represented to have the jth function.
7. The system of claim 2, wherein the QoS security risk attribute generating module generates QoS security risk attributes including:
security attributes, namely integrity attack resistance, DoS attack resistance and electromagnetic attack resistance;
service security attributes, namely availability and non-repudiation.
8. The system of claim 7, wherein the integrity attack resistance, DoS attack resistance, and electromagnetic attack resistance are calculated according to the following formulas:
integrity attack resistance:
Figure FDA0002512379800000031
wherein t isiRepresenting correct input data, u, in airborne service test casesiInput data, t, representing errors in airborne service test casesoOutput data representing trust by the user in airborne service test cases, F (t)i) Indicating on-board service at input tiOutput in case F (t)i,ui) Indicating on-board service at input tiAnd uiOutput in case F (t)o|ti) Is represented at the input of tiIn the case, the portion of the output of the onboard service that is trusted by the user;
DoS attack resistance:
Figure FDA0002512379800000032
wherein u represents a packet or a network connection, D represents a set of packets and network connections, c (u) represents the maximum number of packets and network connections processed by the machine CPU in a unit time, a (u) represents the maximum number of packets and network connections stored in the machine's memory, and h (u) represents the maximum number of packets and network connections stored in the machine's hard disk;
anti-electromagnetic interference capability:
Figure FDA0002512379800000033
where J is the set of airborne services that can be interfered by electromagnetic signals, and W represents the maximum electromagnetic interference strength that the airborne service e can bear.
9. The system of claim 7, wherein said availability and non-repudiation are calculated as follows:
availability:
Figure FDA0002512379800000034
wherein FT is the airborne service failure time, UT is the airborne service available time, G is a possible input parameter value of the airborne service, and P represents the success rate of the airborne service execution under a certain input z;
non-repudiation: DN ═ K (sig), where sig is the user's digital certificate, K is the mapping K: sig → x, x ∈ Z, where Z is a set of positive integers.
10. The system of claim 2,
the external input of the QoS function attribute generation module includes:
the response time of the on-board service,
the on-board service provider's quote,
the function of airborne services;
the external input of the QoS security risk attribute generation module comprises:
correct input data t in airborne service test caseiAnd erroneous input data ui；
Output data t trusted by user in airborne service test caseo；
The maximum number C (u) of the data packets and the network connections u processed by the computer CPU in which the onboard service is located in unit time, the maximum number A (u) of the data packets and the network connections u stored in the memory, and the maximum number H (u) of the data packets and the network connections u stored in the hard disk;
the intensity W (-) of the maximum electromagnetic interference borne by each element in the computer where the onboard service is located;
the method comprises the following steps that (1) airborne service failure time FT, airborne service available time UT, an input parameter range G received by airborne service and an execution success rate P (z) under corresponding input z are obtained;
and carrying out digital certificate sig on the onboard service user.
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