Steganographic Data Hiding in QR Codes

In the era of technological development, data transfer over internet is playing vital role in communication. Now a days use of internet became common and it is necessary to secure the transmission of data in the form of protecting information systems from unauthorized access, use, disruption, modification, recording or destruction. There various methods available for data security, like cryptography and steganography. Steganography is the technique in which data gets hide behind any other information and it becomes difficult for unauthorized user to detect it. QR code is the trademark for a type of matrix barcode consisting of the black square modules arranged in a square grid on a white background. Any imaging devices such as camera, scanner are used for reading the code. In this article we are discussing different technologies that can be used for steganography along with steganography using QR codes.