Design and Implementation of Voice Security System using Simulink

CE 2.1 Project Information
Name of the project: Design and Implementation of Voice Security System using
Simulink
Location of the project: Please fill
Project Duration: Please fill
Organization: Please fill
Role and Designation during the time: Chief Electronics Engineer
CE 2.2 Project Background
CE 2.2.1 Characteristics of the project
The voice security system helps in the easier detection of intrusion unauthorized entry
with the help of voice recognition system. It is considered as one of the easiest and efficient
system to cease any kind of problem related to security. In this project, I have designed as
well as implemented a voice security system with the help of Simulink. I have used two main
techniques of scrambling and AES-128 encryption algorithm. Comparison of these two
techniques is also done in respect to the degree of quality and confidentiality of output voice.
After this comparison, I found out that the scrambling algorithm has produced better quality
audio signal in comparison to AES encryption. However, in respect to security, AES
encryption gave better solutions. For software implementation I selected Simulink since it
was cost effective and gave appropriate results.

CE 2.2.2 Objectives developed for the project
In wireless communication, the channel in which the data is being transmitted by air.
Security is often a major threat for any type of system. The intruders could easily hack the
system and extract data for wrong actions. This type of information security is possible with
the proper implementation of a voice security system with the help of AES encryption and
scrambling method. I decided to propose the design of a voice security system with the help
of Simulink. Hence, to complete the project with utmost efficiency as well as priority, some
of the important objectives were developed by me.
 To design a voice security system for encrypting or decrypting with the help of AES
128 encryption and scrambling or descrambling the voice signals.
 To utilize Simulink for the software designing and implementation of the system.
 To compare the overall performance of the digital encryption with AES 128 as well
as scrambling method.
 To provide services at extremely lower costs in comparison to the other expensive
systems.
 To make the system supported by each and every device and also provide a user-
friendly environment to the users.
 To match and contrast the experimental result with my desired results.
CE 2.2.3 My area of work
Being a successful telecommunications engineer, it was quite easier for me to provide
the design of the voice security system and hence I was selected as the chief electronics
engineer. I had been experimenting with voice recognition security systems for several days
and thus, when I got the chance of executing such a project, I selected Simulink as the project
integration software. Since, I have excellent knowledge of encryption and decryption, I

Head of the
Department
Project Supervisor
Chief Electronics
Engineer (Me)
Team Member Team Member
merged my ideologies of security system and these two techniques of security. My project
supervisor has confidence on me and gave the core responsibility of designing the project.
CE 2.2.4 Project Group
Figure 1: People involved in the project
CE 2.2.5 My responsibilities throughout the project
During the accomplishment of the project, I comprised of various responsibilities. My
most noteworthy duty was to propose a proper design for this voice security system. My other
responsibility was to implement two distinct features of encryption and decryption within my
project so that the voice of the authorized user could access the data and could also lock it.
Similarly, that specific authorized and authenticated user could also transfer or transmit the
data to the receiver by decrypting it with the help of AES-128 and scramble/descramble a
voice signal. I implemented AES 28 encryption algorithm for ensuring that there is no loop
hole for the security. The receiver could only listen to the voice message after decrypting