AN ENHANCED SECURITY FOR GOVERNMENT BASE ON MULTIFACTOR BIOMETRIC AUTHENTICATION

International Journal of Computer Networks & Communications (IJCNC) Vol.8, No.6, November 2016
DOI: 10.5121/ijcnc.2016.8605 55
AN ENHANCED SECURITY FOR GOVERNMENT
BASE ON MULTIFACTOR BIOMETRIC
AUTHENTICATION
Tran Cong Hung1
, Nguyen Thanh Tri1,2
and Ho Nhut Minh3
1
Post & Telecommunications Institute of Technology, Vietnam
2
Binh Duong Department of Information and Communications, Vietnam
3
Saigon University, Vietnam
ABSTRACT
This paper is demonstrating to create a system of multifactor authentication based on biometric
verification. Our system use iris for the first factor and fingerprint for the second factor. Once an attacker
attempts to attack the system, there must have two factors. If one of them is compromised or broken, the
attacker still has at least one more barrier to breach before successfully breaking into the target.
Furthermore, this system will be implemented to enhance security for accessing control login government
system.
KEYWORDS
Multifactor authentication (MFA), biometric, iris recognition, fingerprint recognition
1. INTRODUCTION
1.1. Authentication
Authentication is a method by which a system verifies and validates the identity of a user of the
system who wishes to access it. Authentication [1] ensures and confirms a user’s identity through
a code such as a password and verifies genuineness of a document or signature, to make it
effective or valid. It is the measure employed to ensure that the entity requesting access to a
system is what or who it claims to be, and to counter any inappropriate or unauthorized access.
Authorization is the method of giving individuals access to system objects like information,
application programs etc. based on their identity.
1.1.1. Password and PIN based authentication
Using password (a secret word or string of characters that is used for user authentication) or
Personal Identification Number (PIN which is a secret numeric password and is typically used in
ATMs) to login is the most common knowledge-based authentication method. It is mandatory for
the user to provide knowledge of a secret in order to authenticate the process [2] [3].

56
1.1.2. SMS based authentication
SMS is used as a delivery channel for a one-time password (OTP) generated by an information
system. There are two types of one-time passwords, a challenge-response password which
responds with a challenge value after receiving a user identifier and a password list which makes
use of lists of passwords which are sequentially used by the person wanting to access a system.
User receives a password through the message in the cell phone, and enters the password to
complete the authentication. This SMS-based authentication method is used in the login process
of Internet banking system to authenticate the process [2] [3].
1.1.3. Symmetric-key authentication
In symmetric key authentication, user shares a secret, unique key with an authentication server.
The user may be asked to send a randomly generated message (the challenge) encrypted by the
secret key to the authentication server. If the server can found the match for received encrypted
message (the response) using its shared secret key, the user is authenticated and server authorizes
user’s access to the system [2] [3].
1.1.4. Public-key authentication
In Public-key cryptography a pair of private key and public key is used. A private key is kept
secretly by the user, while the corresponding public key is commonly embedded in a certificate
digitally signed by a certification authority. The certificate is made available to others for sharing
the public key among different users. The private key is used to encrypt the messages send
between the communicating machines and both encryption and verification of signature is
accomplished with the public key [2] [3].
1.1.5. Biometric authentication
Biometrics is a method by which a person's authentication information is generated by digitizing
measurements (encoded value) of a physiological or behavioural characteristic. Users may
biometrically authenticate via their fingerprint, voiceprint, or iris scan using provided hardware
device. The device scans the physical characteristic, extracts critical information, and then stores
the result. Biometric authentication verifies user's claimed identity by comparing an encoded
value with a stored value of the concerned biometric characteristic [2] [3].
1.1.6. Digital Signatures
A digital signature is a digest calculated from a signed document (typically a one-way hash
function) which is then signed (encrypted with private key). The client verifies the digest
signature by decrypting it with the server’s public key and compares it to the digest value
calculated from the message received. The signature can also be used by the server to verify data
the client is sending. Digital signature is used to assure that the downloaded data is genuine and
not malicious or invalid information [2] [3].
1.2. Multi-factor Authentication
Multi-factor authentication (MFA) is an approach to authentication which requires the production
of two or more of the three following independent authentication factors:

57
• Knowledge factor
• Possession factor
• Inherence factor
After submission, each factor must be validated by the other party for authentication to occur.
Multifactor authentication (MFA) [1] is a security system that requires more than one form of
authentication to validate the authenticity of a transaction. Multifactor authentication requires two
or more independent credentials: what the user knows (password), what the user has (security
token) and what the user is (biometric verification).
Previously, MFA systems typically based upon two-factor authentication. Because customers are
more and more using mobile devices for banking and shopping, however, physical and logical
security concerns have converged. This, in turn, has formed more interest in three-factor
authentication.
1.2.1. Knowledge factor ("something only the user knows")
Knowledge factors are the most commonly used form of authentication. In this form, the user is
required to prove knowledge of a secret in order to authenticate like password (a secret word or
string of characters that is used for user authentication), PIN (A personal identification number
(PIN) is a secret numeric password and is typically used in ATMs) and Pattern (Pattern is a
regular or stochastic sequence or array of sets of information as e.g. in a single dimensional
barcode or in a two dimensional matrix code or in a finger print like set in any n-dimensional
stack in any physical representation).
1.2.2. Possession factor ("something only the user has")
Possession factors have been commonly used for authentication from many years, in the form of a
key to a lock. The basic principle is that the key holds a secret which is common between the lock
and the key, and the similar principle is used for possession factor authentication in computer
systems. A number of types of pocket-sized authentication token are available which display a
changing passcode on an LCD or e-ink display, which must be typed in at an authentication
screen, thus avoiding the need for an electronic connection. This can be done one in the forms
such as sequence-based token, time-based token, and the token may have a small keypad on
which a challenge can be entered. The challenge can take one of following tokens:
• Connected tokens: The connected type tokens are available in the form of Magnetic stripe
cards, Smartcards, Wireless RFID-based tokens, USB tokens and Audio Port tokens.
• Soft tokens (computer-simulated software-based tokens): The functionality of any
disconnected token can be emulated as a soft token on a PC or Smartphone using deployed
software, where that device itself becomes the possession factor.
• One-time pads: A one-time pad is a password used only once. Schemes based on a one
time pad have been described but are rarely deployed due to the need to supply a new
password or pad for each authentication.
• Mobile phones: A new category of TFA tools transforms the PC user's mobile phone into a
token device using SMS messaging, an interactive telephone call, or via downloadable
application to a Smartphone.
• SMS one time password: SMS one time password uses information sent to the user in an
SMS as part of the login process.

58
1.2.3. Inherence factor ("something only the user is")
Biometric authentication satisfies the regulatory definition of true multi-factor authentication.
Users may biometrically authenticate via their fingerprint, voiceprint, or iris scan using provided
hardware and then enter a PIN or password in order to open the credential vault. For many
biometric identifiers, the actual biometric information is rendered into string or mathematic
information. The device scans the physical characteristic, extracts critical information, and then
stores the result as a string of data. Comparison is therefore made between two data strings, and if
there is sufficient commonality a pass is achieved.
This paper is organized as follows: section 1 Introduction, section 2 present Biometric
Authentication, section 3 Biometric Modalities, section 4 Proposal System and hardware design
and section 5 is Conclusions.
2. BIOMETRIC AUTHENTICATION
Biometric technologies are defined as, “automated methods of verifying or recognizing the
identity of a living person based on a physiological or behavioral characteristic”. The term
automated methods refers to three basic methods in concern with biometric devices: A
mechanism to scan and capture a digital or analog image of a living personal characteristic;
Compression, processing and comparison of the image to a database of stored images; and
Interface with applications systems. [1]
2.1. Advantages of Biometrics
Biometric traits cannot be lost or forgotten.
Biometric traits are difficult to copy, share and distribute.
They require the person being authenticated to be present at the time and point of authentication.
2.2. Biometric Features
Uniqueness: An identical trait won’t appear in two people.
Universality: Occur in as many people as possible.
Performance: Don’t change over time.
Measurability: Measurable with simple technical instruments.
User friendliness: Are easy and comfortable to measure. [4] [5] [6] [7]
2.3. Physiological vs. Behavioral
When referring to a biometric technology, it is important to distinguish between physiological
and behavioral human characteristic.
A physiological characteristic is relatively a stable human physical characteristic, such as a
fingerprint, iris pattern, or blood vessel pattern on the back of the eye. This type of measurement
is unchanging and unalterable without significant duress. Alternatively, a behavioral
characteristic is a reflection of an individual’s psychological makeup, although physical traits,
such as size and gender, have a major influence. Some of the examples of behavioral traits used to
identify individuals include: Keystroke dynamics, and speech identification and/or verification.

59
Today, we have the technology and processing power to employ advanced, cost-effective, and
much more accurate biometric identification systems. There are two different ways to resolve a
person‟s identity: verification and identification. Verification (am I whom I claim to be?)
involves confirming or denying a person’s claimed identity. In identification, one has to establish
a person‟s identity (who am I?). Each approach has its own complexities and could probably be
solved best by a specific biometric system, including the following [4] [5]:
2.3.1. Physical Biometrics
Fingerprint: Analyzing fingertip patterns.
Facial recognition/face location: Measuring facialcharacteristics.
Hand geometry: Measuring the shape of the hand.
Iris scan: Analyzing features of colored ring of the eye.
Retinal scan: Analyzing blood vessels in the eye.
Vascular patterns: Analyzing vein patterns.
DNA: Analyzing genetic makeup. [4] [5] [6] [7]
2.3.2. Behavioral Biometrics
Speaker/voice recognition: Analyzing vocal behavior
Signature/handwriting: Analyzing signature dynamics
Keystroke/patterning: Measuring the time spacing of typed words. [4] [5] [6] [7]
3. BIOMETRIC MODALITIES
3.1. Fingerprint Recognition
A fingerprint is made up of ridges and furrows. Uniqueness is determined by ridges, furrows, the
minutiae points. Fingerprint is one of oldest and most popular recognition technique. Every
individual possesses unique finger patterns, even twins has different patterns of rings and furrows.
Fingerprint matching techniques are of three types [8] [9]:
• Minutiae-based techniques: In these minutiae points are finding and then mapped to their
relative position on finger. There are some difficulties like if image is of low quality it is
difficult to find minutiae points correctly also it considers local position of ridges and
furrows not global [8].
• Correlation- based method: It uses richer gray scale information. It overcome problems of
above method, it can work with bad quality data. But it has some of its own problems like
localization of points.
• Pattern based (image based) matching: Pattern based algorithms compare the basic
fingerprint patterns (arch, whorl, and loop) between a stored template and a candidate
fingerprint.
Advantages:
• It is the most developed method till now.
• Relatively inexpensive.
• Even twins have unique fingerprint patterns so highly secure.
• Small template size so matching is also fast.

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Problems:
• Systems can be cheated by having artificial finger like finger made up of wax.
• Cuts, scars can produce obstacle for recognition.
Applications:
• Verification of driver-license authenticity and license validity check.
• Law Enforcement Forensics.
• Border Control/Visa Issuance.
3.2. Face Recognition
Face recognition is based on both the shape and location of the eyes, eyebrows, nose, lips and
chin. It is non intrusive method and very popular also. Facial recognition is carried out in two
ways [10] [11]:
• Facial metric: In this location and shape of facial attributes (e.g. distances between pupils
or from nose to lip or chin) are measured.
• Eigen faces: Analyzing the overall face image as “a weighted combination of a number of
canonical faces”.
Another emerging technique is to use face recognition combining with other visual details of skin.
This technique is called as skin texture analysis. The unique lines, patterns, and spots apparent in
a person„s skin is located. According to tests with this addition, performance in recognizing faces
can increase 20 to 25 percent.
Advantages:
• Totally non intrusive.
• Easy to store templates.
• Socially accepted.
Problems:
• Facial traits vary over time.
• Uniqueness is not maintained ex. in case of twins.
• Not proper recognition if person has different expressions like slight smiling can affect
recognition.
• Highly dependent on lightning.
Applications:
• General identity verification.
• Surveillance.
• Access Control.

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3.3. Iris recognition
The iris is the elastic, pigmented, connective tissue that controls the pupil. The iris is formed in
early life in a process called morphogenesis. Once fully formed, the texture is stable throughout
life. It is the most correct biometric recognition system so it is called as king of biometrics. The
iris of the eye has a unique pattern, from eye to eye and person to person. Eye color is the color of
iris. Iris recognition uses camera technology with subtle infrared illumination to acquire images
of the detail-rich, intricate structures of the iris. [12] [13] [14] [15]
Advantages:
• Highly accurate.1 chances in 1078 that iris pattern of two individual matches.
• Highly scalable as iris structure remains same throughout lifetime.
• Small template size so fast matching.
Problems:
• Iris scanners are relatively expensive.
• Scanners can be fooled by high quality image.
• Require cooperation from user.
Applications:
• All of the UAE's land, air and sea ports of entry are equipped with systems.
• Google uses iris scanners to control access to their datacenters.
3.4. Retina Scan
The blood vessels at the back of the eye have a unique pattern, from eye to eye and person to
person. A light source is needed because retina is not visible. The infrared energy is absorbed
faster by blood vessels in the retina than by the surrounding tissue. Based on this pattern of blood
vessels can be easily recognized. It is required that a person remove its glasses, focus on a
specific point for about 10-15 seconds. A coupler is used to read the blood vessel patterns. A
coherent light source is also required for illumination. [16] [17] [18]
Advantages:
• Retinal scan cannot be forged.
• Error rate is 1 out of 10,000,000 (almost 0%).
• Highly reliable.
Problems:
• Reveals some medical conditions (e.g. hypertension), which causes privacy issues.
• It is intrusive so not user friendly.
• Measurement accuracy can be affected by a disease such as cataracts.

62
Applications:
• Utilized by several government agencies including the FBI, CIA, and NASA.
• Used for medical diagnostic applications.
4. PROPOSAL SYSTEM AND HARDWARE DESIGN
Base on the analyst in section 3, we decided using fingerprint and iris recognition for multifactor
authentication system. We used iris recognition for identifying and fingerprint recognition for
verifying.
4.1. Flow Charts Of System
4.1.1. Enroll Flow Charts
Figure 1. The enrolling flow charts

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4.1.2. Authentication Flow Charts
Figure 2. The authentication flow charts
4.2. Hardward Design
The proposed system includes: Iris Sensor and fingerprint sensor. These sensors connect with
client computers by COM and USB port, which connect with servers base on LAN network as
figure 3. If clients want to use applications at server, they must capture their iris and fingerprint
and to send them to servers, servers will implement identification (Iris recognition) and
verification (Fingerprint recognition).

64
Figure 3. Architecture of multifactor authentication in Binh Duong Department of
Information and Communications
4.2.1. Iris Sensor
We used IriShield-USB MO 2121 EVM from Iritech Inc [19]. It shows features as follows:
• Capture Distance: (Optimal distance = 5 cm (2 inches), Focal depth = 6 mm (0.2 inch).
• Image Format: ISO Standard 19794-6 (2005 & 2011), (640 x 480 Pixels, 8 bit Grayscale),
full support of K1, K2, K3, K7.
• Power: Single USB Bus Powered (DC +5V±5%) (Max power consumption=250mA).
• Illumination: Near infrared LED.
• Connectivity: USB 2.0 (IriShield™ - USB Series), UART/ RS-232 ( IriShield™ -UART
Series).
• Security: RSA (2048-bit) and AES (256-bit); X509 Certificate, PFX/PKCS#12 Certificate,
RSA key pair generated on-board.
4.2.2. Fingerprint Sensor
We used FPM-10 from Adafruit [20]. It shows features as follows:
• Supply voltage: 3.6 - 6.0VDC.
• Operating current: 120mA max.
• Peak current: 150mA max.
• Fingerprint imaging time: <1.0 seconds.
• Window area: 14mm x 18mm.
• Signature file: 256 bytes.
• Template file: 512 bytes.
• Storage capacity: 162 templates.
• Safety ratings (1-5 low to high safety).
• Interface: TTL Serial.

65
• Baud rate: 9600, 19200, 28800, 38400, 57600 (default is 57600).
Figure 4. The iris and fingerprint sensor
4.3. Software
We designed and analysed the software by C# and SQL Server 2008, design of the interface is as
follows:
Figure 5. Interface of enroll function

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Figure 6. Result of getting iris image successful for enroll function
Figure 7. Result of getting finger image successful for enroll function

67
Figure 8. Iris templates is stored on disk drive
Figure 9. Finger templates is stored on disk drive

68
Figure 10. Interface of login function
Figure 11. Result of successful identification with iris recognition
and export information of user

69
Figure 12. Result of successful verification with fingerprint recognition
and allow user to access system
Figure 13. User log in to document management software successful
Figure 13. User log in to public service of goverment management successful

70
4.4. Simulation and Discussion
4.4.1. Database of Simulation
The proposed system was tested using the iris and fingerprint database as shown in Table 1. The
database consists of 600 iris and fingerprint image of 50 different individuals. Out of the collected
data 600 samples from both iris and fingerprint are used for training the system and rest 360 are
used for testing. The system is also tested with 360 samples of unregistered data.
Table 1: Details of number of users
Type of users Number of templates
Training Testing
Registered
50 (Persons) × 2 (Irises) ×
6 (Fingerprints) = 600
Unregistered
Total 600 720
4.4.2. Result and Discussion
Table 2. Results of accuracy
Iris Fingerprint Iris + Fingerprint
FRR 2.78% 4.17% 1.67%
FAR 1.12% 1.12% 0.00%
Average Error Rate 1.95% 2.65% 0.84%
Accuracy 98.05% 97.36% 99.16%
The two common error rates are False accept rate (FAR) and False Reject Rate (FRR). FAR is
defined as “the probability of an impostor being accepted as a genuine individual. That is, in a
biometric authentication system, the FAR is computed as the rate of number of people
falsely accepted over the total number of enrolled people for a predefined threshold. FRR
is defined as “the probability of a genuine individual being rejected as an impostor” [9]. That is,
in a biometric authentication system, the FRR is computed as the rate of number of people falsely
rejected (genuine people are rejected) over the total number of enrolled people for a predefined
threshold. FAR and FRR can be changed by a significant amount depending on the
threshold used in the system. If a lower threshold is used in a similarity based biometric matching
system, then the FAR will be higher and the FRR will be lower and vice versa. The performance
of a biometric system may also be expressed using average error rate which is average of FAR
and FRR. A lower average error rate value thus indicates better performance.
Results as shown at table 1, accuracy of our system (99,16 percent) is better performane than iris
or fingerprint authentication system in turn are 97.36 and 97.36 percent.
Time of indentification (Iris recognition) is less equal one second and verification (Fingerprint
recogniton) user is less equal three seconds.

71
5. CONCLUSIONS
In this paper, we studied mutltifactor authentication, biometric authentication and comparation of
biometric authentication. Base on those biometric authentications, we built a multifactor
authentication system using iris and fingerprint biometric. Simulation of our multifactor
authentication system is relatively high accurate, therefore it can be used as a control access
system, high safety login information systems,etc. In future studies, we are going to continue
experience on large database, detection of fake iris and fingerprint, improving processing time of
capturing and matching iris and fingerprint template.
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Authors
Tran Cong Hung was born in Vietnam in 1961. He received the B.E in electronic and
Telecommunication engineering with first class honors from HOCHIMINH University
of technology in Vietnam, 1987. He received the B.E in informatics and computer
engineering from HOCHIMINH University of technology in Vietnam, 1995. He
received the master of engineering degree in telecommunications engineering course
from postgraduate department Hanoi University of technology in Vietnam, 1998. He
received Ph.D at Hanoi University of technology in Vietnam, 2004. His main research
areas are B – ISDN performance parameters and measuring methods, QoS in high speed
networks, MPLS. He is, currently, Associate Professor PhD. of Faculty of Information Technology II, Posts
and Telecoms Institute of Technology in HOCHIMINH, Vietnam.
Nguyen Thanh Tri was born in Vietnam in 1990. He received the B.E in informatics and
computer engineering from Posts and Telecoms Institute of Technology in HOCHIMINH,
Vietnam, 2013. He is currently a MSc. Candidate in Information System from Post &
Telecommunications Institute of Technology, Vietnam in 2016. He is working in Binh
Duong Department of Information and Communications, Vietnam.
Ho Nhut Minh was born in Vietnam in 1987. He received the B.E in Electronics and
Telecommunication engineering from Ho Chi Minh City University of Technology and
Education, Vietnam, 2010. He received the M.E degree in Telecommunications Engineering
from Post and Telecommunication Institute of Technology in Ho Chi Minh, Vietnam, 2014.
He is working as lecturer in Faculty of Electronics - Telecommunication, Saigon University,
Vietnam.

AN ENHANCED SECURITY FOR GOVERNMENT BASE ON MULTIFACTOR BIOMETRIC AUTHENTICATION

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AN ENHANCED SECURITY FOR GOVERNMENT BASE ON MULTIFACTOR BIOMETRIC AUTHENTICATION