QR code-based user secret information hiding method

Abstract

The invention belongs to the technical field of information safety, and discloses a QR code-based user secret information hiding method. The method comprises the following steps that: firstly, generating a position sequence, and generating the position sequence for information hiding by a user by using a secret key and a pseudo random number generator; and then encoding the secret information needing to be hidden by the user and then hiding the secret information into the encoding process of the QR code by using the position sequence. The hidden QR code can be normally scanned to read the cover information, so that the attention of an attacker is not easily attracted. Finally, the user can recover the secret information in the hidden QR code by using the secret key. According to the method, the privacy information of the user is hidden by utilizing the QR code, the pseudo random number generator and the information hiding property, and only the user with the secret key can read the hidden information. The hiding and recovering algorithm is low in calculation complexity, can be used on low-power equipment, and is wide in application scene.

Description

technical field [0001] The invention belongs to the technical field of information security, in particular to a method for hiding user secret information based on a QR code. Background technique [0002] Currently, the closest existing technology: a QR code is a two-dimensional code or matrix barcode that stores data information and is designed to be read by a smartphone. QR stands for Quick Response, which means that the code content should be quickly decoded at a very fast speed. The QR code consists of black modules arranged in a square pattern on a white background. The encoded information can be text, URL or other data. QR codes are designed to allow their content to be decoded at high speed. Therefore, its large capacity and fast decoding speed make the popularity of QR codes grow rapidly all over the world. Nowadays, the built-in cameras of mobile phones generally have the function of recognizing QR codes. [0003] Generally speaking, in order to protect the priv...

AI Technical Summary

Problems solved by technology

However, because the content of QR code is completely transparent, it is only used as a coding method. Therefore, research in the industry mostly regards it as a data carrier, and does not provide security protection on the coding mechanism of QR code.

In the application of QR code, it is mostly used to store the back-end database link to facilitate people's access, but the direct exposure of the network link of the back-end database is likely to cause potential risks such as unnecessary privacy information leakage of users, which may attract the attention of intruders

However, as a data carrier, QR code does not distinguish between user privacy information and general information. Today, when QR codes are widely used, information security issues such as QR code information privacy and security are important issues we face.

[0004] To sum up, the problems existing in the existing technology are: the QR code is completely transparent without any security mechanism protection, and the direct exposure of the network link of the back-end database has caused potential risks, which may attract the attention of intruders

And since QR code scanners are mainly low-power mobile devices, the computational complexity of the scheme should not be high

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