Abstract
Due to the advantages of larger content and error correction capability, quick response (QR) code is commonly used as a tagging technology for the Internet of Things (IoT) recently. However, the cover message of QR code can be easily decoded by a QR code reader, which causes the security and privacy of the cover message to raise the important issues. In this paper we present a new secret hiding scheme based on QR code. The proposed scheme has low computational complexity and is suitable for low-power devices in IoT systems because of utilizing the error correction property of QR code to hide secret information. The proposed scheme hides the secret information without changing the cover message of QR code and the user can get the cover message by using a general scanner, which contributes to reducing attacker’s curiosity. The hidden secret information can be read by a special scanner with the help of the user key. One thing which is better than other known schemes is that the proposed scheme can resist contrast analysis attack. In addition, experimental results show the proposed scheme has feasibility, low computational complexity, and high hiding payload.
Highlights
The Internet of Things (IoT) interconnects physical and digital objects that are identifiable and may interact with each other and with users
This may lead to leaking of privacy. Another important issue is the security of Quick response (QR) code when we use a QR code to communicate secret information
To show the hiding procedure, we introduce QRC which denote the coding function of QR code including step 1 and step 2 of constructing QR code and QRCS denote the coding
Summary
The Internet of Things (IoT) interconnects physical and digital objects that are identifiable and may interact with each other and with users These objects, each with its own identity, are well beyond only computers and they are our cars, luggage, household applicants, humans, and so on. QR code can store rich information including text, URL link, and other types of data They can be used as a data carrier to allow users to access the system more conveniently in an IoT system. The cover message of the QR code can be read by a barcode reader [1], such as a mobile phone with a camera This may lead to leaking of privacy. Another important issue is the security of QR code when we use a QR code to communicate secret information
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