CODE MODULATION BASED ENCRYPTION & DECRYPTION

TECHNIQUE FOR SECURE COMMUNICATION IN

WIRELESS

ABSTRACT

In Today’s Electronic communication take important role. Today’s Communication technology

the chatting system from one Place to another is easy and fast. But security is of some concern,

for that we send the data by the system named as Advanced chatting system using

Microcontroller.

In our project we have two sections, one is transmitter section and another one is Receiver

section. The two sections are designed around a microcontroller as a control unit with all the

devices interfaced to it. The main aim of the project is to transmit the data using wireless

communication by encrypting the data. At the receiver side, the encrypted data is decrypted and

is shown in the PC.

According to this project the person who wants to send the data to a remote place has to type the

data from the PC. The data is received by microcontroller and is sent to RF transmitter after

encrypting it. The RF receiver receives the data decodes it and displays the encrypted data in

PC. If the actual data is to be viewed then a password is to be pressed. Now the cipher text is

converted into plaintext.

BLOCK DIAGRAM

TRANSMITTER

RECIEVER

PC

Encoder

RF TX

POWER SUPPLY

MICRO CONTROLLER

(AT89S52)MAX232

DECODER

RF RX

POWER SUPPLY

MICRO CONTROLLER

(AT89S52)

MAX232

PC