CN107623684A - The access method combined using ABAC model cootrols network service - Google Patents
The access method combined using ABAC model cootrols network service Download PDFInfo
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Abstract
The present invention discloses a kind of access method for utilizing and being combined based on attribute access Controlling model ABAC control network services, it is intended to which, more to save the time, the mode for saving resource protects the sensitive information in network Services Composition not compromised, avoids it by unauthorized access.The present invention's concretely comprises the following steps：1. extracting attribute constraint from policy library, the distributed storage of attribute constraint is realized；2. a kind of access control mechanisms are proposed, the constraint of separate computations body attribute and environment attribute constraint.Present invention, avoiding influence of the unrelated strategy to the lookup time during access control in policy library, solves the problem of resource waste in network service combination invoked procedure, greatly reduces the average allocating time of network service combination.
Description
Technical field
The invention belongs to field of computer technology, further relates to one kind profit in computer network security technology field
With improved based on attribute access Controlling model ABAC (Attribute Based Access Control) control network services
Access method.The present invention, which can be used for conducting interviews to the process that access network services and network service combine, to be controlled to protect
System sensitive information, network service combination is avoided by unauthorized access.
Background technology
Network service is mutually related a series of, and the operational set for completing some functions jointly is packaged, there is provided one
Individual interface, network service access person can be by calling the interface access network services.Network service is in this way access
Person provides service.In this high flexibility of network service, under high dynamic and cross-domain distributed environment, it is easy to cause quick
Feel the leakage of information and the unauthorized access of resource.Can be to the access process of network service based on attribute access Controlling model ABAC
It is controlled, using network service access person's attribute, the visit of network service attribute and environment attribute to being stored in policy library
Ask that control strategy carries out the calculating of property value, realize fine granularity mandate, so as to avoid the non-of the leakage of sensitive information and resource
Method accesses.Using being controlled based on attribute access Controlling model ABAC to the access process of network service, there are as below methods：
Paper " the Attributed based access control for that E.Yuan and J.Tong deliver at it
Web services”(IEEE International Conference on Web Services,2005,2005:561-
569) a kind of access method for utilizing and network service being controlled based on attribute access Controlling model ABAC is proposed in.The tool of this method
Body step is：First, simple object access protocol (Simple Object Access Protocal) client passes through master
Body attribute authority (aa) gets the attribute of network service access person, and the attribute information of accessed network service access person is put into
In soap message head, SOAP request message is sent to soap message processor.Second, soap message processor gets SOAP please
After seeking message, SOAP request message is transmitted to policy decision point PDP (Policy Decision Point), PDP passes through acquisition
The attribute of the Resource Properties arrived, environment attribute and the network service access person in SOAP request message calculate policing rule
For value so as to draw the result of decision (allow or refuse), the result of decision is sent to soap message processor.3rd, if decision-making
Result is to allow, then original SOAP request is passed to web service endpoint by soap message processor, to network service access
Person provides service.Otherwise, soap message processor will refuse the access request of network service access person.It is insufficient existing for this method
Part is：On the one hand, because the policy library based on attribute access Controlling model is huge, strategy can be caused to search the increase of time；
On the other hand, when being combined due to access network services, the access process of each network service is mutually solely in network service combination
Vertical and network service access process existence time retardance, therefore work as and utilize this method to carry out network service combined access
During control, resource and waste of time can be caused.
Paper " Shen H, the Hong F.An Attribute-Based that H.Shen and F.Hong deliver at it
Access Control Model for Web Services”(International Conference on Parallel
and Distributed Computing,Applications and Technologies.IEEE,2006:Carried in 74-79)
WS-ABAC models are gone out, and the sensitive attribute information of user are protected by automated trust negotiation mechanism.The specific step of this method
Suddenly it is：First, network service access person sends SOAP request message to WS-ABAC modules.Second, WS-ABAC get network
It is authoritative (Resource Authorities) according to resource after the request message of service access person, environment authority
(Environment Authorities) and attribute authority (aa) (Attribute Authorities) get network service ginseng
Count, the attribute of environment attribute and network service access person, then the policing rule in policy library calculates the result of decision.
3rd, if the result of decision is to allow, SOAP request message is sent to corresponding network service by WS-ABAC modules.Otherwise,
WS-ABAC modules will refuse the access request of network service access person.In the method, the attribute of network service access person is direct
Obtained by the context handler in WS-ABAC, eliminate the repeating process of attribute information, reduce the probability of attribute error.
Weak point is existing for this method：On the one hand, the context handler in WS-ABAC only obtains web service parameter conduct
Object attribute in ABAC models, object attribute type is very little, it is impossible to which the access to network service access person carries out fine-grained
Control.On the other hand, when being combined due to access network services, the access process of each network service is phase in network service combination
Mutual independent and network service access process existence time retardance, therefore visited when carrying out network service combination using this method
During the control asked, resource and waste of time can be caused.
In summary, current prior art is the net asked using the attribute of the network service access person got
The attribute and environment attribute of network service, the policing rule in policy library calculate the result of decision, then according to decision-making knot
Fruit authorizes to network service access person.But it is network service access person that current this mode, which is only applicable to single network service,
The situation of service is provided.During network service request, if in service discovery stage (service discovery
Phase) do not find and meet the single network service of user's request it is necessary to enter Services Composition stage (service
Composition phase), multiple network services are subjected to Automatic Combined, provide the user with service jointly.If with existing
Technology controls the access that network services combine, when one in Services Composition service is due to body attribute, object attribute or ring
Border attribute is unsatisfactory for policing rule and refuses to provide the user service, then the network service applied just all wastes.This is just
Cause a large amount of wastes of time and resource.
The content of the invention
It is an object of the invention to for above-mentioned the deficiencies in the prior art, propose a kind of using based on attribute access control mould
Type ABAC controls the access method of network service, it is intended to which, with the time is more saved, the mode for saving resource is protected in network service
Sensitive information is not compromised, avoids it by unauthorized access.
Realizing the thinking of the object of the invention is, first to being improved based on attribute access Controlling model ABAC, proposes one
The new tactful method for expressing of kind, and access control policy is subjected to distributed storage, to save the time of strategy retrieval.It is in addition
The time during network service access and the waste of resource are reduced, proposes a kind of new strategic decision-making mechanism, it is right in two steps
Network service conducts interviews control decision.
The method of the present invention, including step are as follows：
(1) the access control watch chain of network service combination to be controlled is obtained：
(1a) extracts all nets in network service combination to be visited from based on attribute access Controlling model ABAC policy librarys
Body attribute constraint and environment attribute constraint in network Service Properties constraint definition；
(1b) constrains body attribute constraint and environment attribute, is stored respectively in each net in network service combination to be visited
In the access rule table of network service；
The access rule table of all-network service is put into access rule watch chain by (1c), and access rule watch chain represents networking
The set of access rule table corresponding to all-network service in Services Composition；
(2) an access rule table is chosen：
Put in order from access rule watch chain according to set and choose an access rule table；
(3) according to the following formula, the body attribute constraint factor in selected access rule table is calculated：
Wherein, C represents the body attribute constraint factor in selected access rule table, the meter of body attribute constraint factor
The sum that body attribute constrains in the access rule table that result is 0 or 1, n expression are selected is calculated, ∪ is represented or operation, SjRepresent
J-th of body attribute constraint in selected access rule table；
(4) judge whether the body attribute constraint factor in selected access rule table is 0, if so, then refusing network
The access request of service access person, perform step (10)；Otherwise, step (5) is performed；
(5) the environment attribute constraint factor in selected access rule table is obtained：
According to the following formula, the body attribute that each result of calculation in selected access rule table is 1 is constrained corresponding
Environment attribute constraint is combined：
Wherein, G represents the environment attribute constraint factor of access rule table, and the result of calculation of environment attribute constraint factor is 0
Or 1, m represent the sum of environment attribute constraint in access rule table, EiRepresent i-th of environment attribute constraint in access rule table；
(6) judge whether access rule table is last in access control rule watch chain, if so, then performing step
(7)；Otherwise, step (2) is performed；
(7) all environment attribute constraint factors are put into environment attribute constraint chain, environment attribute constraint chain represents all
The set of the environment attribute constraint factor of access rule table；
(8) put in order from network service combination according to network service and choose a network service；
(9) environment attribute constraint factor corresponding to selected network service is calculated；
(10) judge whether environment attribute constraint factor is 0, if so, then refuse the access request of network service access person,
Perform step (13)；Otherwise, step (11) is performed；
(11) selected network service is accessed；
(12) judge whether selected network service is last in network service combination, if so, performing step
(13)；Otherwise, step (8) is performed；
(13) whole access process is terminated.
The present invention has the following advantages that compared with prior art：
First, the present invention is overcome using the access based on attribute access Controlling model ABAC control network service combinations
The mutual independence and time delay of each network service access during prior art is combined due to network service, when easily causing
Between and the wasting of resources deficiency so that the present invention be applied to control network service combine access process, solve network clothes
The waste problem of resource under business combination environment, greatly reduces the mean access time of network service combination, and its performance obtains
Very big lifting.
Second, the present invention constrains body attribute constraint and environment attribute, is stored respectively in network service combination to be visited
In each network service access rule table in, overcome prior art due to based in attribute access Controlling model ABAC due to
The huge caused strategy of policy library searches the deficiency of waste of time so that the present invention realizes point of access control policy
Cloth stores, and avoids the influence that the unrelated strategy in policy library searches strategy during access control the time, greatly reduces
It is tactful to search the time and the influence of time is searched strategy in policy library expansion.
Brief description of the drawings
Fig. 1 is the flow chart of the inventive method.
Embodiment
1 couple of present invention is described further below in conjunction with the accompanying drawings.
Step 1, the access control watch chain of network service combination to be visited is obtained.
From based on attribute access Controlling model ABAC policy librarys, extract all-network in network service combination to be visited and take
Body attribute constraint during business attribute constraint defines constrains with environment attribute.
Attribute constraint is defined as follows：
D=＜ AT ＞ ＜ OP ＞ ＜ VALUE ＞
Wherein, D expressions attribute type expression formula, ＜ AT ＞ expression attribute types, ＜ OP ＞ expressions≤, >=, ＜, ＞,
=,！=collection close in a logical operator, this set can by user add custom logic operator, ＜ VALUE ＞ tables
Show property value, F represents attribute constraint minor, and x represents the sum of attribute type expression formula, DpRepresent p-th of attribute type expression
Formula, T represent attribute constraint, and the result of calculation of attribute constraint is 0 or 1, y represent the sum of attribute constraint minor, FqRepresent q-th
Attribute constraint minor.
If the attribute type in attribute constraint is body attribute type, the attribute constraint is referred to as body attribute about
Beam, if the attribute type in attribute constraint is environment attribute type, the attribute constraint is referred to as environment attribute constraint.
By body attribute constraint and environment attribute constraint, each network clothes in network service combination to be visited are stored respectively in
In the access rule table of business.
Access rule table is as follows：
| Label | Body attribute constrains | Environment attribute constrains |
| 1 | S1 | E1 |
| 2 | S2 | E2 |
| 3 | S3 | E3 |
| …… | …… | …… |
| n | Sn | En |
S in table1, S2, S3... ..., Sn, respectively the 1st in expression access rule table, the 2nd ... ..., n-th of main body
Attribute constraint, E1, E2, E3... ..., En, 1st is represented in access rule table respectively, and the 2nd ... ..., n-th of environment attribute is about
Beam.Every a line in access rule table represents an access control policy.Represent when body attribute constraint and environment attribute constraint
When being 1, network service access person may have access to network service corresponding to the access rule table.
The access rule table of all-network service is put into access rule watch chain, access rule watch chain represents network service
The set of access rule table corresponding to all-network service, the expression according to the following formula of access rule watch chain in combination：
L=[A1,A2,...,At]
Wherein, L represents access rule watch chain, A1,A2,...,AtRespectively the 1st in the combination of expression network service, the 2nd
It is individual ... ..., the access rule table corresponding to t-th of network service.
Step 2, an access rule table is chosen.
Put in order from access rule watch chain according to set and choose an access rule table.
Step 3, according to the following formula, the body attribute constraint factor in selected access rule table is calculated：
Wherein, C represents the body attribute constraint factor in selected access rule table, the meter of body attribute constraint factor
Calculate the sum that body attribute constrains in the access rule table that result is 0 or 1, n expression are selected, SjRepresent selected access rule
Then j-th of body attribute constraint in table.
Step 4, judge whether the body attribute constraint factor in selected access rule table is 0, if so, then refusing net
The access request of network service access person, perform step 13；Otherwise, step 5 is performed.
Step 5, the environment attribute constraint factor in selected access rule table is obtained.
According to the following formula, each value in selected access rule table is constrained into corresponding environment category for 1 body attribute
Property constraint be combined：
Wherein, G represents the environment attribute constraint factor of access rule table, and the result of calculation of environment attribute constraint factor is 0
Or 1, m represent the sum of environment attribute constraint in access rule table, EiRepresent i-th of environment attribute constraint in access rule table.
Step 6, judge whether access rule table is last in access control rule watch chain, if so, then performing step
Rapid 7；Otherwise, step 2 is performed.
Step 7, all environment attribute constraint factors are put into environment attribute constraint chain, environment attribute constraint chain represents institute
There is the set of the environment attribute constraint factor of access control list, environment attribute constrains the expression according to the following formula of chain：
R=[G1,G2,...,Gw]
Wherein, R represents environment attribute constraint chain, G1,G2,...,GwRespectively the 1st in the combination of expression network service, the 2nd
It is individual ... ..., the environment attribute constraint factor of the access rule table corresponding to w-th of network service.
Step 8, put in order from network service combination according to network service and choose a network service.
Step 9, environment attribute constraint factor corresponding to selected network service is calculated.
Step 10, judge whether environment attribute constraint factor is 0, if so, the access for then refusing network service access person please
Ask, perform step 13；Otherwise, step 11 is performed.
Step 11, selected network service is accessed.
Step 12, judge whether selected network service is last in network service combination, if so, performing step
Rapid 13；Otherwise, step 8 is performed.
Step 13, whole access process is terminated.
Claims (2)
1. it is a kind of using the access method based on attribute access Controlling model ABAC control network service combinations, it is characterized in that, bag
Include following steps：
(1) the access control watch chain of network service combination to be visited is obtained：
(1a) extracts all-network in network service combination to be visited and taken from based on attribute access Controlling model ABAC policy librarys
Body attribute constraint during business attribute constraint defines constrains with environment attribute；
(1b) constrains body attribute constraint and environment attribute, is stored respectively in each network clothes in network service combination to be visited
In the access rule table of business；
The access rule table of all-network service is put into access rule watch chain by (1c), and access rule watch chain represents network service
The set of access rule table corresponding to all-network service in combination；
(2) an access rule table is chosen：
Put in order from access rule watch chain according to set and choose an access rule table；
(3) according to the following formula, the body attribute constraint factor in selected access rule table is calculated：
<mrow>
<mi>C</mi>
<mo>=</mo>
<munderover>
<mrow>
<mi></mi>
<mo>&cup;</mo>
</mrow>
<mrow>
<mi>j</mi>
<mo>=</mo>
<mn>1</mn>
</mrow>
<mi>n</mi>
</munderover>
<msub>
<mi>S</mi>
<mi>j</mi>
</msub>
</mrow>
Wherein, C represents the body attribute constraint factor in selected access rule table, the calculating knot of body attribute constraint factor
The sum that body attribute constrains in the access rule table that fruit is 0 or 1, n expression are selected, ∪ is represented or operation, SjSelected by expression
J-th of body attribute constraint in the access rule table taken；
(4) judge whether the body attribute constraint factor in selected access rule table is 0, if so, then refusing network service
The access request of visitor, perform step (10)；Otherwise, step (5) is performed；
(5) the environment attribute constraint factor in selected access rule table is obtained：
According to the following formula, the body attribute that each result of calculation in selected access rule table is 1 is constrained into corresponding environment
Attribute constraint is combined：
<mrow>
<mi>G</mi>
<mo>=</mo>
<munderover>
<mrow>
<mi></mi>
<mo>&cup;</mo>
</mrow>
<mrow>
<mi>i</mi>
<mo>=</mo>
<mn>1</mn>
</mrow>
<mi>m</mi>
</munderover>
<msub>
<mi>E</mi>
<mi>i</mi>
</msub>
</mrow>
Wherein, G represents the environment attribute constraint factor of access rule table, and the result of calculation of environment attribute constraint factor is 0 or 1, m
Represent the sum of environment attribute constraint in access rule table, EiRepresent i-th of environment attribute constraint in access rule table；
(6) judge whether access rule table is last in access control rule watch chain, if so, then performing step (7)；It is no
Then, step (2) is performed；
(7) all environment attribute constraint factors are put into environment attribute constraint chain, environment attribute constraint chain represents all access
The set of the environment attribute constraint factor of rule list；
(8) put in order from network service combination according to network service and choose a network service；
(9) environment attribute constraint factor corresponding to selected network service is calculated；
(10) judge whether environment attribute constraint factor is 0, if so, then refusing the access request of network service access person, perform
Step (13)；Otherwise, step (11) is performed；
(11) selected network service is accessed；
(12) judge whether selected network service is last in network service combination, if so, performing step (13)；
Otherwise, step (8) is performed；
(13) whole access process is terminated.
2. the access method according to claim 1 based on attribute access Controlling model ABAC control network service combinations,
Characterized in that, the attribute constraint described in step (1a) is defined as follows：
D=＜ AT ＞ ＜ OP ＞ ＜ VALUE ＞
<mrow>
<mi>F</mi>
<mo>=</mo>
<munderover>
<mrow>
<mi></mi>
<mo>&cap;</mo>
</mrow>
<mrow>
<mi>p</mi>
<mo>=</mo>
<mn>1</mn>
</mrow>
<mi>x</mi>
</munderover>
<msub>
<mi>D</mi>
<mi>p</mi>
</msub>
</mrow>
<mrow>
<mi>T</mi>
<mo>=</mo>
<munderover>
<mrow>
<mi></mi>
<mo>&cup;</mo>
</mrow>
<mrow>
<mi>q</mi>
<mo>=</mo>
<mn>1</mn>
</mrow>
<mi>y</mi>
</munderover>
<msub>
<mi>F</mi>
<mi>q</mi>
</msub>
</mrow>
Wherein, D expressions attribute type expression formula, ＜ AT ＞ expression attribute types, ＜ OP ＞ expressions≤, >=, ＜, ＞ ,=,！=
A logical operator in set, the set can be added custom logic operator by user, and ＜ VALUE ＞ represent attribute
Value, F represent attribute constraint minor, and x represents the sum of attribute type expression formula, DpRepresent p-th of attribute type expression formula, T tables
Show attribute constraint, the result of calculation of attribute constraint is 0 or 1, y represent the sum of attribute constraint minor, FqRepresent q-th of attribute about
Beam minor.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108712369A (en) * | 2018-03-29 | 2018-10-26 | 中国工程物理研究院计算机应用研究所 | A kind of more attribute constraint access control decision system and method for industrial control network |
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