QR code (abbreviated from Quick Response Code) first designed in 1994 for the automotive industry in Japan by Denso Wave.
The QR code is square, only black and white. In three corners, a square pattern with a smaller, "return" character is printed. These three small square help software decode it. The user does not need to align. The data can still be read correctly regardless of scanning at any angle.
Here are the advantage of QR code
1. High-density coding, large information capacity: can accommodate up to l850 uppercase letters or 2710 digits or 1108 bytes, or more than 500 Chinese characters, which is about several times higher than the ordinary barcode information capacity.
2, a wide range of encoding: the bar code can encode pictures, sounds, text, signatures, fingerprints and other digital information can be encoded, expressed in bar code; can represent multiple languages; can represent image data.
3, strong fault tolerance, with error correction function: This makes the 2D barcode due to perforation, fouling, etc. caused by local damage, can still be correctly read, the damage area up to 50% can still recover information.
4, the decoding reliability is high: it is much lower than the ordinary bar code decoding error rate of two parts per million, the bit error rate is not more than one in ten thousand.
5, can introduce encryption measures: confidentiality, anti-counterfeiting.
6, low cost, easy to make, durable.
7. The barcode symbol shape and size ratio are variable.
8, QR code has the characteristics of large storage, high confidentiality, high traceability, strong damage resistance, large redundancy, and low cost. These characteristics are especially suitable for forms, security, tracking, license, inventory, Data backup and other aspects.
As above advantages make QR code widely use in different industries such as :Mobile operating systems ,URLs,Virtual stores,QR code payment,Website login,WiFi network login,TOTP use,Encryption,Video games etc
QR codes can be used to store bank account information or credit card information, or they can be specifically designed to work with particular payment provider applications. There are several trial applications of QR code payments across the world. In developing countries like India and China, QR code payment is a very popular and convenient method of making payments.
In November 2012, QR code payments were deployed on a larger scale in the Czech Republic when an open format for payment information exchange — a Short Payment Descriptor — was introduced and endorsed by the Czech Banking Association as the official local solution for QR payments. In 2013, the European Payment Council provided guidelines for the EPC QR code enabling SCT initiation within the Eurozone.
QR codes are commonly used in the field of cryptographic currencies, particularly those based on and including Bitcoin. Payment addresses, cryptographic keys and transaction information are often shared between digital wallets in this way.