Download Microcontroller Encryption Project Report: Abstract, Acknowledgment, Analysis and more Assignments Mathematics in PDF only on Docsity!
DECLARATION
This is to clarify that this report is our original work. No part of this report has been copied from any source or has been used before for any other course related purpose. Any material reproduced in this report has been properly acknowledged.
Sincerely,
- Sabrina Jalil ID: 1811675042
- Fahim Istiak ID: 1812400042
- Moshiur Rahman Faisal ID: 1811966042
- Rubayet Kabir Tonmoy ID: 1811180042
- Nazmul Hasan Shaikot ID: 1812455642
- Awsaf Mahmood Lisan ID: 1813117042
ACKNOWLEDGMENT
We would like start off by thanking the Almighty for giving us the strength to complete the project and the report. We are also deeply grateful to all of our teachers who have supported us and provided us the knowledge to carry out this project.
It is imperative to show our appreciation for our honorable faculty member Dr. Dihan Md. Nuruddin Hasan who has given us proper guidelines to prepare the project. His undivided attention and advices have helped us to achieve this milestone. We are also very grateful to the department of Electrical and Computer Engineering of North South University for providing us with a course like CSE 331 where we learn about microprocessor and implement our knowledge by working on a project like this.
We thank our friends and family for their moral support throughout the project.
Project Description:
Encryption is a method of converting information into a secret code that requires a โkeyโ or password to decode. This process is used by many websites that transmit credit card and bank account numbers to prevent identity theft and fraud.
In this project we input a 4-bit data and the microcontroller converts it to a 4-bit encrypted data. The output corresponds to the input given in the table. 0โs are considered low and 1โs are considered high. Single pole and double throw switch are used to configure high and low conditions of the inputs. LEDs are used to denote the output. If the LED lights up its high (1) and if it is turned off then itโs low (0).
Software Used:
1. Arduino IDE: The Arduino Integrated Development Environment (IDE) is a cross- platform application for Windows, macOS and Linux. It supports the languages C and C++ with special rules of code structuring. The program written with Arduino IDE is known as sketch. Arduino IDE is an open-source software that is mainly used for writing and compiling the code into the Arduino Module. It is an official Arduino software. The IDE environment mainly has the editor where the program is written and the compiler which compiles and uploads the file onto the Arduino model.
2. Proteus: Proteus is a proprietary software tool that is used for electronic design automation. It is mainly used to create schematics and electronic prints along with simulation of electronic designs.
Flow Chart:
Figure 1: Simple Flow Chart of the Encryption Process
Method of Derivation:
In order to find out the required algorithm we use K-map to derive the Boolean expressions. K- maps or Karnaugh maps are used to simplify Boolean algebraic functions. There are two forms of K-map- (i) Sum of Products (SOP) and (ii) Product of Sums (POS). Either can be used according to the problem. K-map is a table like representation where the grids are filled with 0โs and 1โs according to the given problem and solved by making groups. For our project we are using SOP to find out when the output is high (1).
4 - bit input Microcontroller (Encryption) 4 - bit output
Equation: I 0 โI 3 โ + I 1 โI 3 โ + I 0 โI 1 โI 3 โ + I 0 โI 1 I 2
Output 4:
00 01 11 10 00 01 11 10
Equation: I 0 โI 1 โI 2 โI 3 + I 0 โI 1 โI 2 I 3 โ +I 0 I 1 โI 2 โI 3 โ + I 0 I 1 โI 2 I 3 + I 0 I 1 I 2 I 3 โ
Result:
The obtained Boolean expressions gives us the following results in C/C++ language-
Output 1: (!I 0 && !I 2 && !I 3 โ) || (!I 1 && I 2 && I 3 ) || (I0 && I1 && I3) || (I0 && I1 && I2)
Output 2: (I 2 && !I 3 ) || (I 0 && I 2 ) || (!I 0 && I 1 && !I 2 ) || (I 1 && !I 2 && I 3 )
Output 3: (!I 0 && !I 3 ) || (!I 1 && !I 3 ) || (!I 0 && !I 1 && !I 3 ) || (!I 0 && I 1 && I 2 )
Output 4: (!I 0 && !I 1 && !I 2 && I 3 ) || (!I 0 && !I 1 && I 2 && I 3 ) || (I 0 && !I 1 && I 2 && I 3 ) || (I 0 && I 1 && I 2 && !I 3 )
AB
CD
Circuit Diagram:
const int O2 = 9;
const int O3 = 10;
const int O4 = 11;
int I0 = 0;
int I1 = 0;
int I2 = 0;
int I3 = 0;
void setup() {
pinMode(StateI0, INPUT); pinMode(StateI1, INPUT); pinMode(StateI2, INPUT); pinMode(StateI3, INPUT); pinMode(O1, OUTPUT); pinMode(O2, OUTPUT); pinMode(O3, OUTPUT); pinMode(O4, OUTPUT);
}
void loop() {
I0 = digitalRead(StateI0);
I1 = digitalRead(StateI1);
I2 = digitalRead(StateI2);
I3 = digitalRead(StateI3);
if( (!I0 && !I2 && !I3) || (!I1 && I2 && I3) || (I0 && I1 && I3) || (I0 && I1 && I2) ){ digitalWrite(O1, HIGH); } else{ digitalWrite(O1, LOW); }
if( (I2 && !I3) || (I0 && I2) || (!I0 && I1 && !I2) || (I1 && !I2 && I3) ){ digitalWrite(O2, HIGH); } else{ digitalWrite(O2, LOW); }
if( (!I0 && !I3) || (!I1 && !3) || ( !I0 && !I1 && !I3) || ( !I0 && I1 && I2) ){ digitalWrite(O3, HIGH);
Click this to view "Hex File"
Simulation: We used Proteus version 8.12 professional to carry out our simulation of
arduino uno. We simply imported the Atmega328p board in the workspace and connected the needed peripherals by importing them in similar manner. After that we flashed the Hex file onto the board and carried out our simulation. A screenshot taken during simulation of our project:
- Is the project referring encryption or decryption from input to output?
Answer: Yes, The project is working perfectly for encryption or decryption from input to output as shown in the truth table.
