Iaetsd database intrusion detection using

DATABASE INTRUSION DETECTION USING
ROLE BASED ACCESS CONTROL
SYSTEM
Mrs. ANTONY VIGIL MRINALINI SHRIDHAR R OVIYA
ASSISTANT PROFESSOR STUDENT STUDENT
SRM UNIVERSITY SRM UNIVERSITY SRM UNIVERSITY
ABSTRACT- In this paper, we propose a different
approach for the database intrusion detection
(IDS). Database Management (DBMS) has
become a key criteria in the information system
(IS) storing valuable information of the system.
We are urged to protect it to the fullest without
losing any bit of information. Intrusion detection,
which gathers and analyses the information
system was one of the methods which protects the
database the fullest with all sorts of rules. In this
paper, we move into the Role based Access
Control (RBAC) system which controls the
administered databases for finding out sensitive
attributes of the system dynamically. Role based
Access Control is a method to restrict system
access by authorized and unauthorized people
directly. The access is based on the roles of the
individual users within the organization.
Important roles like administrator, access
sensitive attributes and if their audit logs are
mined, then some useful information regarding
the attributes can be used. This will help to decide
the sensitivity of the attributes. Since the models
of the database intrusion detection has proposed a
lot of rules , it is time to change the system to
protect it more evidently with less rules and
regulations which would be useful for detecting all
sorts of transactions.
Keywords: Database intrusion detection, Role
based access control system, Administered
database, Audit logs, Sensitive and attributes.
1.INTRODUCTION
In past years, Database Management System
(DBMS) have become an indispensible part of the
life of the organizers and the users using it. Hence it
was the primary priority to safeguard the DBMS, no
matter how easy or difficult it was. The motive of the
researches was first based on these ideas of
protecting the DBMS and to prevent the leakage of
data. The past years, Authentication user privileges ,
Auditing, Encryption and lots of methods have been
used to protect the data and the system. Amending all
the above methods, newer methods have come up to
protect the same for daily operations and decision
making in organizations. Database is a group or
collection of data's which may contain valuable and
sensitive information about the institution and
organization, which is accessed by the people of the
organization internally and externally every day.
Any leak of information in these systems
will devastate the whole database system and the
data's, leading to a great loss. Hence the data need to
be protected and secured. The recent models of
protection of DBMS were the dynamic threshold
method and the data mining method of Intrusion
detection system. Intrusion detection method is a
process which analyses the unauthorized access and
malicious behaviors and finds intrusion behaviors
and attempts by detecting the state and activity of an
operating system to provide an effective means for
intrusion defend. In this paper, we will see how
RBAC will help us to protect the database along with
the intrusion detection with limited rules.
RBAC- Role based access control, also
known as role based security is a method to restrict
access of just one user, and also many users
depending on the role of the users. The roles are
prioritized like Example: Administrators access
sensitive attributes and the DBMS and its attributes
can be used. RBAC is a rich technology for
authentication privileges and controlling the access of
the information and data. It makes the administration
of the security (work) much easier and simpler,
though the process may be tedious and little vast. The
possibility of adding newer application inside the
secured system is much easier with the different
access control mechanism. Extracting the data from
the protected information system is much easier only
by an authorized person. Talking about the sensitivity
of the attributes we will have to refine the audit log
to extract the data attributes.
In the past few years computer crime and
security survey conducted by the Computer Security
Institute(CSI) have seen a lot of drastic improvement
73
INTERNATIONAL ASSOCIATION OF ENGINEERING & TECHNOLOGY FOR SKILL DEVELOPMENT
2nd INTERNATIONAL CONFERENCE ON CURRENT TRENDS IN ENGINEERING RESEARCH
ISBN : 378 - 26 - 138420 - 6
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in both the aspects ,but only thing was that there need
to be a lot of adjustments in the rules given by each
model. We are in the scoop of improving the
database system and protecting it. In 2005, about
45% of the inquired entities have reported increased
unauthorized access to information due to the poor
system management. In 2007, financial application
fraud was the leading cause and found it double as
compared to the previous year also 59% of the
respondents outlined insider abuse as the security
problem. In 2013, survey the number has dropped
down and the security was much more than the past
few years. The statistics being, the percentage threats
due to insiders has been dropped to 20% and the
financial fraud which was a cause before were
eliminated in the upcoming years. Now only 10-20%
are reported as unauthorized users. This shows that
the database security has been improving day to day
and researches have been conducted every time a
model is proposed before implementing to action.
2.ROLE BASED ACCESS CONTROL MODEL
The Role based access control model
proposes 3 relationships between the attributes given.
They are:
a) USER-JOB: Which defines the relationship
between the user and the task defined in that system.
b) JOB-ACCESS: Which defines the relationship
between the job or the task of the person and the
access to that particular work.
c) JOB-JOB: Which defines the job to job
relationship between the users.
Now defining each attribute of the model we
have the users of an organization represents an
organizer or an agent of that field. The task or the job
represents the responsibility or the functioning of the
user within the organization. The access represents
the approval or a permission to that particular task or
event of that organization. The sessions box
represents the overall relationship between the user
and the task the contribution both has in the RBAC
model. It does not point towards the access field as
the access field is directed only by the task the user
performs. Constraints represent the limitations or the
boundary of each entity of that data that is, the user,
task or job, access as well as the relationship between
them is also restricted. The sessions represent the
Divide and rule mechanism of the RBAC model. The
fig 2 and 1 are interlinked process and each step of
the data flow diagram will implement the following
attributes of the user.
FIG 1. MODEL OF RBAC
3.RELATED WORKS
RBAC supports three well known principles and
hence we work out our plan in 3 steps:
1. Principle of minimal authority
2. Divide and rule method of duties
3. Data abstraction
Data secured
Authorization access
FIG 2. DATA FLOW DIAGRAM
The sensitivity of an attribute is based on
the database application. We have to divide the
attributes into 3 divisions so as to protect the
attributes according to the sensitivity or the position
order they hold. Sensitivity refers to the position
order a data has to be protected. If the data are least
sensitive we can give it minimal protection. If the
data are highly sensitive in the attribute set we need
Principle of minimal authority
User
Divide and rule method
Data abstraction
Data
USERS TASK /JOB ACCESS
SESSIONS
CONSTRAINTS
74
ISBN : 378 - 26 - 138420 - 6
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to protect it to the fullest. In some schematics we are
not able to tell whether the data is sensitive or not. To
give a clear picture of the attributes we have taken
the Student Database Schema.
TABLE 1.TEACHER'S SALARY DATABASE
SCHEMA
TABLE NAME ATTRIBUTE NAME
STAFF
Name [i], Staff-id [j], Address
[d], Phone no [a]
ACCOUNT
Account-id [b], Staff-id [c],
Status [g], Month [e], Year [f],
Amount [h]
SALARY TYPE
Salary-type [k], LOP and
Deductions [l]
TABLE 2. TYPES OF SENSITIVE ATTRIBUTES
SENSITIVITY ATTRIBUTE WEIGHTS
Light
sensitivity
a, b, c, d, i, ,j ,k I
Medium
sensitivity
e, f II
High sensitivity g, h, l III
The sensitivity of the attributes can also be
given by the entity-relationship model [E-R]. But
with relation to the RBAC model , an administrator is
required to control the database for its sensitivity. It
is a perception of the real world. It is the
diagrammatic representation of how the attributes are
considered. The * represents if the attributes are
sensitive or not. The model represents a collection of
entities or data's and the contribution to the system.
To maintain the account and the staff system we need
a main administrator. Hence the RBAC system
proposed in this E-R model .Thus E-R model is
modified as:
GETS
FIG 3.RBAC MODEL USING E-R MODEL
a) Principal of minimal authority- Also known as
the principle of least privilege means that the access
to the information system or its resources for only its
own legitimate purpose by every user or the module.
In simple words, we can say that an authorized user
can access that information system or the resource
only for their own privileged purpose. Privileged/
Authority refers to the right a user has or granting
access to the user to use a particular system. For
example, the user defined in its domain can access
only its domain and its attributes. The person
accessing a bank account can go through only their
bank procedures and account. The system does not
access or grant permission to access other accounts.
Similarly an admin user accessing a computer can go
into only the admin user account all other password
accounts are blocked for the admin user.
b)Divide and rule method of duties- it can also be
termed as the separation of duties among the users. It
helps the task to be completed faster. A mutual
exclusive role is achieved to complete a particular set
of task. RBAC brings this advantage of time
management. the database is secured as well as the
data are given to the authorized people easily with
security.
c)Data abstraction- Data abstraction is a simple
concept of accessing the data whenever we want to
but with the permission of authorized people. It has
different modes to it.
STAFF + ACCOUNT + SALARY TYPE =
ACCOUNTS ADMINISTRATOR
NAME* STAFF ID* ADDRESS*
STAFF
ACCOUNT
ACC ID* AMT DEPOSIT*** STATUS**
ACCOUNTS
Administrator
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ISBN : 378 - 26 - 138420 - 6
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i)Public Mode- The access to the data by
any user of the domain, but limited to a particular
organization. This requires a common security where
only the users of the organization can access it.
ii)Private Mode- The access of the data is
limited only to the key user of that particular search
of interest. That is only the accountants can handle
the accounts of the organization and hence access to
that particular class is given only to that particular
user. A manager accessing the accounts of the
company will be denied from accessing it.
iii)Protected Mode- The user in that
particular domain and the senior user that is one or
maximum two users who has to write to access that
domain can access it with ease. Example only the
accountants and the chief of the company can check
the accounts of hat particular institution and make
changes in that. The others have no right to access
these without their permission. For the others the
domain remains in blocked state.
4. IMPLEMENTATION
RBAC is a complex system that involves a
strategic process prepared by an expertise. RBAC is
best implemented by applying a structured and
detailed procedure. The use of divide and rule
method is very essential to implement these process.
Each task or step is broken down into sub tasks for
the work and implementation to be easier and more
efficient. The steps involved are:
FIG 4.PROCESS
a)Develop Plans- To make best use of RBAC we can
develop and plan for the RBAC system into best
work in an organization or for a project's security of
data. Example to extract the maximum security from
RBAC a development plan including a project, etc.
should be developed along with the deadline , budget
etc.
b)Compile- This step involves the collection and
putting together of all data , files , projects, etc. so as
to identify the level of security needed to implement
it. Sensitivity of the attributes should be determined
so as to segregate and compile the system to one to
provide the highest security possible.
c)Define Roles- As we have discussed that operation
of database system is first best used only by the key
user or the important user of that organizer or a
system. Hence assigning a particular role to that
person for the easy access of the software to access
the data with ease and implement any kind of proper
change within the system.
d)Analyze- this is a main step for any kind of system
to know and to formulate RBAC. This would bring
about the betterment of the system so that the next
stage of implementation would be easier to execute.
Any changes needed in the system should be done in
this stage so that no further disputes arise at the later
stage.
e)Integrate- Before any problem occurs in the system
like system failure, we need to transfer each
application's security system to a centralized security
system so as to provide a secured companywide
information access. this would be the last step of the
process and would be the final stage without making
any changes.
e)Implement- To put forth whatever we have
executed these many steps without any errors or any
types of problems. These are the best ways to protect
a data from the external user.
Thus refining the system and protecting it
according to the steps followed would give a better
result. Always the principle of divide and rule
method is followed in RBAC which is the key
principle of the system.
5.PROCESS USING A FORMULAE
Each datum is a process streamline flow of
information which is guarded by security. These
syntaxes along with the formula help in the security
purpose. This formula was implemented in the Web
Based technology, now it is time to implement it in
Database to ensure its safety.
DEVELOP PLANS
COMPILE
DEFINE ROLES
ANALYSE
INTERGRATE
IMPLEMENT
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ISBN : 378 - 26 - 138420 - 6
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Syntax:
For the above E-R diagram of the process ,the
interaction between the staff salary and the account
we can create a formula based on the process.
The other way of representing it is to split the
process:
Where staff and the account have no
sensitivity and hence it's just an attribute of the
system, where as the other attribute- name, staff id,
phone, account, account id, amount deposited are the
inputs and the output is the status.
The two processes can be divided and then
later combined to form a single equation. If the
process needs to be changed or read or any other kind
of operations, they can be done by the given formula
which would be useful for the later run.
To calculate the sensitivity or to know the
sensitivity of the attributes, automatic capitalization
would be invoked to represent the highest sensitive
attributes in the given set of data or the formula
generated at the end of the process typed. The least
sensitive are given in small letters. The medium
sensitive might be in italic letters. The ones inside
brackets represents that it is a secured data and hence
it is the start of the process and that the data must be
protected fully. Hence we cannot find the sensitivity
of the attribute at the mid stage of the process. The
same process with a change to denote the sensitivity
is represented as :
The other way is:
P1=>| (staff)P| name(P).X | staff id(P).X | phone(P).X
P2=>| (account)P | account id(P).X | AMOUNT
DEPOSITED(P).X|STATUS(P).Y
P=>| P1||P2
Thus this formula would be easy for the
generation of large sets of data and to secure the data
and hence even if there is a small change in the
capitalization or the attributes or the brackets or any
syntax mistake there would be an error generated in
the system which would spoil the whole set of data.
This is done for just a small set of data. We can
proceed this for a huge one. An outsider seeing this
would not understand the type of data or the
importance of the data and hence would hesitate to
meddle with it.
6.CONCLUSION
Intrusion detection mechanism helps to
secure the data in an organization. In this paper we
have discussed in detail how the database could be
secured by using Role Based Access Control System.
The key benefits of RBAC are high efficiency and
low maintenance cost for any type of organization be
it big or small. Also RBAC system could be designed
and used to improve the operational performance and
strategic business value. This system could
streamline and automate any business procedures,
thus providing high/ better/ faster benefits to the user.
It also helps to maintain privacy and confidentially of
the employees in any organization. Thus we can
conclude that mission to protect any key business
process is a main vision of RBAC system in database
intrusion detection.
P=>0 no process
| P | P composition of the process
| O(P).X output value of the process, X is the
outcome.
| I(P).Y input value/ getting input from the
user of the process, Y is the input variable.
| !!I(P).Y repetition of the input variables.
P=> run the process
| D(P) main data or the attributes
| read(P) read the data or the attributes
| change(P) change the data or the attributes
P=>enable(R).D gives permission to R to
access a data
P=>disable(R)>D gives permission to R to
disable the data or remove or stop the process till R.
P=>| {(staff)P | name(P).X | staff id(P).X |
phone(P).X} || {(account)P | account id(P).X |
amount deposited(P).X | status(P).Y}
P1=>| (staff)P| name(P).X | staff id(P).X | phone(P).X
P2=>| (account)P | account id(P).X | amount
deposited(P).X | status(P) .Y
P=>| P1||P2
P=>| {(staff)P | name(P).X | staff id(P).X |
phone(P).X} || {(account)P | account id(P).X |
AMOUNT DEPOSITED(P).X | STATUS(P).Y}
77
ISBN : 378 - 26 - 138420 - 6
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REFERENCES
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78
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Iaetsd database intrusion detection using

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