A QR Code is a specific matrix barcode (or two-dimensional code), readable by dedicated QR barcode readers and camera phones. The code consists of black modules arranged in a square pattern on a white background. The information encoded can be text, URL or other data. Common in Japan, where it was created by Toyota subsidiary Denso-Wave in1994, the QR code is one of the most popular types of two-dimensional barcodes. QR is the abbreviation for Quick Response, as the creator intended the code to allow its contents to be decoded at high speed. QR codes were originally made to track parts in vehicle manufacturing. QR codes are free to anyone who wants to make them or use them for any kind of tracking or promotional service. QR codes contain embedded information that can only be read by QR code readers that are usually downloaded by smart phones. The purpose of QR codes is to give a consumer additional information about the product, an event, or even a promotion. It is widely used in daily life because it has high capacity encoding of data, damage resistance, fast decoding. QR code technique can be used for Steganography which leads to many problems, so to recover or retrieve the hidden secret information, the Reed Solomon and list decoding scheme being used. QR code technique also used in cryptography, as it has mainly used to convey or store message because they have large storage capacity than conventional barcode. Here the information being send (which is in an encrypted format) securely and safely to authorized party. The focus of this paper is to explore and analysis the compilation of data and research regarding the current digital functionalities, benefits, limitations and future expectations of QR code in digital technology.

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Standard Qr Code Two Level Qr Code Technique Cryptography Steganography Document Authentication