WIRELESS SECURED DATA TRANSMISSION USING RF TECHNOLOGY                                       

The main scheme in this for security of data is based on hardware address based security.  The transmitter has address change option and the master can assign any address the receiver having addressed same as the assigned by the master at transmitter end will receive the data only. There is no provision  at  receiver to change the address that is, address is fixed.

In this technology there is a two way security.

(i)                The very first security is being provided by the algorithm used as a function in the microprocessor. It can be any private algorithm to modify the original data and to send the modified data further, thus hiding the usual meaning of the data.

(ii)              The second most security is provided by the selective transmission of the message spectra. The carrier used is 434MHz to modulate the message signal. Even if there are multiple receivers, the message can be received by only one of the receivers by using selective addressing scheme. 

Today, we live in an age of wireless revolution where every effort is directed towards getting rid of wires. Removing wires not only makes things easy but also improves speed of operation. For example no one wants to stop at a toll tax and then mechanically deposit money rather there needs to be mechanism through which the car needn’t be stopped and still the tax gets deposited. This will help in both achieving customer satisfaction as well as improving the efficiency of whole system.

Similarly identification of different things has also achieved new heights. It is very important to keep track of one’s assets and hence unique identification has a major scope of development. This unique identification system will improve the overall efficiency of the system and will bring more social security. Through this technology we can keep track of our pets, clothes, cars and various other things. This technology has application ranging from commercial purposes to even for an individual.

This project is used to communicate or transmit a text message from one place to another place through wireless. The text message is encrypted by using the Microcontroller and the encrypted message was transmitted through wireless. At the receiver end the signal was received by the standard receiver and the analog signal was fed to the Microcontroller and it was decrypted by the Microcontroller and the message was displayed over the LCD display. We can use several receivers and the message from the transmitter can be sent to the entire receivers at the same time. Each receiver can be accessed separately by its address. The Microcontroller is used to do the above work. It gets data from the Keyboard and encrypts with a private algorithm and at the receiver end the Microcontroller decrypts it with the same algorithm and display the data over the LCD display.

RF technology merges wireless communication with secure or 12 bit password protected data transmission, in which every source emits its Identification Code and then after receiving it, a receiver decrypts the signal and identifies the particular transmitted massage. Then this information about the source is displayed and stored for future use.