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.
