IJSRP, Volume 5, Issue 4, April 2015 Edition [ISSN 2250-3153]
Mangesh Kulkarni, Prasad Jagtap, Ketan Kulkarni
In the 21st century, with more use of internet there has been significant increase in various attacks on the network. Here we describe the technique of how can a secrete communication take place between two or more parties secretly. In this paper the technique of cryptography and Steganography are used all together for to achieve message confidentiality. In cryptography, message gets encrypted and in Steganography, it gets embedded within the selected image. For that, we first substitute the original message by using the fourteen square substitution algorithm. After the substitution of text, we then encrypt this text message using RSA algorithm. The encrypted message is then hidden within image by Least Significant Bit (LSB) method. This image works as a carrier file and is sent to the receiver. At the receivers end, same operations are performed to decrypt the original message in reverse order. It is found that here we are using the double ciphering techniques which makes the system very robust and secures it from known hacking attacks. It makes very difficult for the intruders to hack the image and then decrypt the message in a feasible amount of time thus securing it from many known network attacks.