Introduction to two-dimensional Barcode anti-counterfeit Technology Principles and Applications

In recent years, QR code technology has been widely used in manyCommunityAndAppThey can be seen in both. As a technology, two-dimensional barcode has unique characteristics. Compared with the one-dimensional code, the QR code has a large storage capacity, high confidentiality, high traceability, high readability, strong Error Correction performance, high loss resistance, large backup, low cost, and information can be moved with the carrier. and other advantages, it can encode photos, texts, fingerprints, palm prints, sounds, signatures, and other information. It is widely used in document certificates, ticket anti-counterfeiting, and product anti-counterfeiting.

QR code anti-counterfeiting mainly uses cryptography principles to encrypt all digitalized information as raw data and generate a set of encrypted data files, that is, to form data with higher confidentiality, the encrypted information is displayed as a QR code. The encrypted QR code is decrypted with a key to obtain the QR code in plaintext, thereby providing anti-counterfeiting.

As a widely used QR code technology, QR codes,In addition to its large capacity, high reliability, low space occupation, ability to represent Chinese characters and images, and strong confidentiality and anti-counterfeiting, it has the advantages of one-dimensional bar code and other two-dimensional bar codes, QR codes can also read over 30 QR codes containing 100 characters per second. QR codes are compressed to represent Chinese characters, which is 20% more efficient than other two-dimensional codes; the QR code can also be read in all directions. The QR code has three image search images on the three corners. The CCD reader is used to detect the position, size, tilt angle, and decode of the QR code, to achieve 360-level ultra-high speed and comprehensive reading; in terms of anti-counterfeiting, China Mobile has also defined QR codes.
Code application data format, which is in the DoCoMo format. The recognition result is formatted and displayed, and the mobile phone application function is further expanded. The mobile phone application function can be expanded based on the recognition information, added SMS sending, email sending, and website opening functions. QR code has four levels of Error Correction functions, which can be read correctly even if damaged or damaged.

QR code is as follows:

First, encrypt the plaintext information, then generate the encrypted QR code pattern, and then describe the QR code transmitted to the server segment through the Internet for scanning, reading, and decryption.AlgorithmDecrypt and restore the plaintext information. You can determine whether the plaintext information is consistent with the decrypted plaintext information.