Private Data Sharing and File Authentication using Two-Level QR Code

Abstract

To provide secured encoding and secured user authentication, the QR code authentication with two level storage and security is proposed, which help to verify original content in QR code. The proposed work uses public and private storage level of document storage. In the public level same standard QR code storage level is explored; which can be readable to any QR code readable device. The private level is constructed by replacing the black modules by specific textured patterns. It consists of information encoded using QR code with an error correction capacity. QR code will increase the storage capacity of the QR code, but also to verify the original document from a copy. This authentication is due to the sensitivity of the used patterns to the print-and-scan process. The pattern recognition method that we use to read the second-level information can be used both in a private message sharing and in an authentication scenario. Text steganography is used for message encoding. Key Words: QR Code, Two Storage Levels, Private Message, Document Authentication, Pattern Recognition, Print-And-Scan Process.