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Network Security is essential to any organization. This has been previously done by manual method. But this project is aimed at computerized Network Security to make the work easier. This is possible because of the advance improvement in information technology as pertaining programming language; because this is achieved by the help of visual basic programming language and other programming language. For the first few decades of their existence, computer\ networks were primarily used by university researchers for sending e-mail and by corporate employees for sharing printers. Under these conditions, security did not get a lot of attention. But now, as millions of ordinary citizens are using networks for banking, shopping, and filing their tax returns, network security is looming on the horizon as a potentially massive problem. The requirements of information security within an organization have undergone two major changes in the last several decades before the widespread use of data processing equipment the security of information felt to be valuable to an organization was provided primarily by physical and administrative means with the introduction of computer the need for automated tools for protecting files and other information stored on the computer became an evident .this is especially the case for a shared system such as time sharing system and the need is even more acute for systems that can be accessed for a public telephone or a data network the generic name for the collection of tools to protect data and to thwart hackers is ―computer security‖. Network Security is a broad topic and covers a multitude of sins. In its simplest form, it is concerned with making sure that nosy people cannot read, or worse yet, secretly modify messages intended for other recipients. It is concerned with people trying to access remote services that they are not authorized to use. Most security problems are intentionally caused by malicious people trying to gain some benefit, get attention, or to harm someone. Network security problems can be divided roughly into four closely intertwined areas: secrecy, authentication, non repudiation, and integrity control. Secrecy, also called confidentiality, has to do with keeping information out of the hands of unauthorized users. This is what usually comes to mind when people think about network security. Authentication deals with determining whom you are talking to before revealing sensitive information or entering into a business deal. Non repudiation deals with signatures.


Title page i Approval page ii Certification iii Dedication iv Acknowledgement v Abstract vi Table of content vii

CHAPTER ONE 1.0 Introduction 1 1.1 Statement of the problem 5 1.2 Purpose of study 6 1.3 Aims and objective of the study 6 1.4 Scope of study 7 1.5 Limitations 7 1.6 Assumptions 7 1.7 Definition of terms 8

CHAPTER TWO 2.0 Literature review 10

CHAPTER THREE 3.0 Description and analysis of the existing system 16 3.1 Fact Finding Method Used 16 3.2 Objective of the existing system 17 3.3 Organizational chart 18 3.4 Input/process/output analysis 19 3.5 Information flow diagram 20

CHAPTER FOUR 4.0 Design of new system 21 4.1 Output specification and design 21 4.2 Input specification and design 22 4.3 File design 23 4.4 Procedure chat 23 4.5 System flowchart 24

CHAPTER FIVE 5.0 Implementation 26 5.1 Program design 26 5.2 Program flowcharts 28 5.3 Documentation 29 5.4 Recommendation 30 5.5 Conclusion 30 5.6 Summary 32 Reference 35 Appendix I 36 Appendix II 37


Several recent proposals have argued for giving third parties and end-users
control over routing in the network infrastructure. Some examples of such
routing architectures include TRIAD [6], i3 [30], NIRA [39], Data Router [33],
and Network Pointers [34]. While exposing control over routing to third-parties
departs from conventional network architecture, these proposals have shown
that such control significantly increases the flexibility and extensibility of these
Using such control, hosts can achieve many functions that are difficult to
achieve in the Internet today. Examples of such functions include mobility,
multicast, content routing, and service composition. Another somewhat
surprising application is that such control can be used by hosts to protect
themselves from packet-level denial-of-service (DOS) attacks [18], since, at the
extreme, these hosts can remove the forwarding state that malicious hosts use to
forward packets to the hosts. While each of these specific functions can be
achieved using a specific mechanism—for example, mobile IP allows host
mobility— we believe that these forwarding infrastructures (FIs) provide
architectural simplicity and uniformity in providing several functions that makes
them worth exploring. Forwarding infrastructures typically provide user control
by either allowing source-routing (such as [6], [30], [39]) or allowing users to
insert forwarding state in the infrastructure (such as [30], [33], [34]). Allowing

forwarding entries enables functions like mobility and multicast that are hard to
achieve using source-routing alone.
While there seems to be a general agreement over the potential benefits of user
controlled routing architectures, the security vulnerabilities that they introduce
has been one of the important concerns that has been not addressed fully. The
flexibility that the FIs provide allows malicious entities to attack both the FI as
well as hosts connected to the FI.
For instance, consider i3 [30], an indirection-based FI which allows hosts to
insert forwarding entries of the form (id,R), so that all packets addressed to id
are forwarded to R. An attacker A can eavesdrop or subvert the traffic directed
to a victim V by inserting a forwarding entry (idV ,A); the attacker can
eavesdrop even when it does not have access to the physical links carrying the
victim’s traffic. Alternatively, consider an FI that provides multicast; an attacker
can use such an FI to amplify a flooding attack by replicating a packet several
times and directing all the replicas to a victim. These vulnerabilities should
come as no surprise; in general, the greater the flexibility of the infrastructure,
the harder it is to make it secure.
In this project, we improve the security that flexible communication
infrastructures which provide a diverse set of operations (such as packet
replication) allow. Our main goal in this project is to show that FIs are no more
vulnerable than traditional communication networks (such as IP networks) that
do not export control on forwarding. To this end, we present several

mechanisms that make these FIs achieve certain specific security properties, yet
retain the essential features and efficiency of their original design. Our main
defense technique, which is based on light-weight cryptographic constraints on
forwarding entries, prevents several attacks including eavesdropping, loops, and
traffic amplification. From earlier work, we leverage some techniques, such as
challenge-responses and erasure-coding, to thwart other attacks.

(NS) is an important aspect of any system. NETWORK SECURITY is the act
of ensuring that an authenticated user accesses only what they are authorized to
and no more. The bad news is that security is rarely at the top of people’s lists,
although mention terms such as data confidentiality, sensitivity, and ownership
and they quickly become interested. The good news is that there is a wide range
of techniques that you can apply to help secure access to your system. The bad
news is that as Mitnick and Simon (2002) point out ―…the human factor is the
weakest link. Security is too often merely an illusion, an illusion sometimes
made even worse when gullibility, naivette, or ignorance come into play.‖ The
go on to say that ―security is not a technology problem – it’s a people and
management problem.‖ Having said that, my experience is that the ―technology
factor‖ and the ―people factor‖ go hand in hand; you need to address both issues
to succeed.

Access control is the ability to permit or deny the use of a particular resource by
a particular entity. Access control mechanisms can be used in managing
physical resources (such as a movie theater, to which only ticket holders should
be admitted), logical resources (a bank account, with a limited number of people
authorized to make a withdrawal), or digital resources (for example, a private
text document on a computer, which only certain users should be able to read).
Banks are secured financial institutions. They are often housed in large
buildings that are located in a commercial or residential area. Banks store
money and other financial information and goods.
Money and valuables have been stored in banks since ancient times. As a result
of the long history that banks have enjoyed, bank security has also been
important for a long time. Some of the oldest banks in the world have the best
security available. These banks include the Bank of Sweden, the Bank or
England, Bank of America, and Swiss Banking.
Bank security usually includes a staff of security guards, a security system, and
one or more vaults. Security guards are uniformed personnel that maintain high
visibility and watch cameras and alarms. Cameras and alarms are usually top of
the line systems in banks and other financial buildings. But these security
elements are not exclusive to banks. Some of these elements can be found in
other commercial buildings and even residential homes.

Basic security starts with the locks. For a high level of security, windows and
doors will need the best locks. After high quality locks are installed many
property owners opt for a security system or even security cameras.
Security cameras are often a small part of a larger security system. Systems
often include motion detectors, alarms, sensors, and cameras. Cameras are
arguably the most important because they allow the property owner to see and
record everything that happens in and around their building or property.
Cameras can be installed by a professional or by a property owner. For a large
and elaborate system it may be best for a professional to do the work. But for a
smaller and easy layout, a property owner should have no problem installing a
system by following the manufactures instructions. If he does than there is
usually a local installer that can be called to help finish the job.

Owing to:
1. Fraudulent act of some customer/workers
2. Accessing the organizational data/information unauthorized
3. Sensitive nature of bank data/information
4. Valuable or costly items in bank

5. Increase in crime in our society
The need arise for the development of computerized NETWORK SECURITY
to eliminate such problems.

The main purpose of this project is to design a NETWORK SECURITY that
will assist UBA in the area of ensuring effective security measures.

This project will have the following aims and objectives:
Detecting security violations
Re-creating security incidents
To disallow unauthorized users
To safeguard the organizational data/information
To computerized the organizational security
To enhance the organizational security
To eliminate all forms of mistakes associated with security control

This research work will access the design and implementation of NETWORK
SECURITY in UBA Enugu. It will look into the operations of this bank in the
aspect of computerizing their security control system.

This project will be limited to the data available at hand, data outside the
researcher will not be made use of.
The limitations militating against this research are financial constraints, time
factor and other circumstances.

Accuracy, efficiency and reliability is associated with Network Security.
For the purpose of this research, my assumptions can be stated as follows:
1. The application of computer related garget for security control
2. A computerized Network Security is effective and dependable

Administration is an aspect of running the organization by devising systems
which will run smoothly.
2. Client: This any process that request specific services from server

3. Computer: This is an electrons machine that can accept; handle and
manipulate data by performing arithmetic and logic operations without
human intervention usually under the control of programmes.
4. Data: This is fore runner of information. It is unprocessed fact.
5. Database is a collection of information that is related to a particular
subject or purpose.
6. Hardware: This is the electromechanical part of computer system.
7. Information: This is data that have been processed, interpreted and
understood by the recipient of the message or report.
8. Internet is a collection of computer networks that operate to common
standards and enable the computes and the program they run to
communicate directly.
9. Server: This is a process that provides requested services for clients.
10. Software: This is a logically written program that hardware uses to
perform it’s operation.
11. System is the collection of hardware, software, data information,
procedures and people.
12. Website is a space or location customized by a company, organization or
an individual which is locatable within an address on the internet.


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