TRANSMITTING BULK AMOUNT OF DATA IN THE FORM OF QR CODE WITH CBFSC AND CHUNKING TECHNIQUES- FIGHTING AGAINST CRYPTANALYTIC ATTACKS
N V Krishnamoorthy · 2013
A technique to transmit bulk amount of data in the form of QR code (Quick Response Code) and to make secure transmission of QRC containing the information is proposed. Since last few years, two-dimensional (2D) codes have gained the attention of the people from the industrial backgrounds and gradually replaced one-dimensional bar codes in many applications due to their higher information storage capacity. Quick response (QR) codes, defined by the ISO/IEC18004 standard, are one of the most popular types of 2D codes. So,initially, the bulk information to be transmitted is put into a QR container. Considering the very dark side of the unsecure QR codes, we enhance security by chunking the actual QR to be transmitted and then encrypt individual chunk using the CHAOS BASED FEEDBACK STREAM CIPHER (CBFSC) mechanism. Using this technique, the chunked QR code is encrypted pixel by pixel considering the values of previously encrypted pixels, in each iteration. After this, each encrypted chunk is transmitted over the network as packets At the receiving end, the chunks are decrypted individually. Finally, they are clustered to get the original QR code that can be read using secure QR reader, thus fighting against cryptanalytic attacks. Thus a QR code containing the information to be transmitted is encrypted using the above said The advantage is that any changes in the plain image are cascaded forward throughout the cipher image, which means that two almost identical plain images will encrypt to completely different cipher images. Notably, all the QR images are almost identical and so is the reason we use the said technique. As the QR codes stand as data containers that provide more security when encrypted, from the viewpoint of data hiding researches, they shall then be regarded as the visible watermarks helping us to transmit bulk data.