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SQR codes facts for kids

Kids Encyclopedia Facts
QR code
Example of an SQR code

Secure Quick Response codes or SQR codes are secure high data density two dimensional bar-codes. QR codes are high density 2D bar codes first created and patented by Denso Wave in Japan QR codes. They are becoming a popular means to encode data for quick machine readable (camera or bar-code scanner)retrieval and decoding on a worldwide basis. Nokia, Apple, and Android smart-phones often already have a mobile application to create and read QR codes and there are numerous mobile application available which can be downloaded from application stores.

Secure Quick Response codes are as the name implies a secure method for encrypting data into a bar-code which then becomes extremely difficult to decode into the original plain text in the absence of the encryption cipher or key. A typical implementation of SQR codes would be to create a one-time use SQR code on a mobile handset's high resolution screen to effectively create a highly secure one-time-pad type of encryption One Time Pad of for example an on-line account number. SQR codes because they can be used on hundreds of millions of already installed phones and because no additional hardware on the mobile handset is necessary, can operate in a similar fashion to NFC handsets for secure mobile payments. A typical implementation is to encrypt and use a precursor physical machine readable token such as the card identity number (CID) written in read-only-memory (ROM) of a Secure Digital microSD card contained in a mobile telephone or even the international mobile identity number (IMEI) IMEI in the event no microSD card is present as for example on an Apple iPhone. SQR codes may be securely machine read in a retail environment at the POS using prevalent 2D bar-code scanners or even a low cost web camera. Secure Quick Response codes were first developed by Yodo a company operating in Japan and are patent pending.

Images for kids

  • Japan-qr-code-billboard

    A QR code used on a large billboard in Japan, linking to the sagasou.mobi website

  • Z80-Tianjin -Beijing

    QR codes have been used and printed on train tickets in China since 2010.

  • Japan Visa with QR code

    Japanese immigration stamp with a QR code (content is encrypted)

  • QR Code Damaged

    Damaged but still decodable QR code

  • 2 150 150DPI ty oerny 08 2011

    Example of a QR code with artistic embellishment that will still scan correctly thanks to error correction

  • Hcc2d

    Samples of the High Capacity Colored 2-Dimensional (HCC2D) code: (a) 4-color HCC2D code and (b) 8-color HCC2D code.

  • Qr-1

    Version 1 (21×21). Content: "Ver1"

  • Qr-2

    Version 2 (25×25). Content: "Version 2"

  • Qr-3

    Version 3 (29×29). Content: "Version 3 QR Code"

  • Qr-4

    Version 4 (33×33). Content: "Version 4 QR Code, up to 50 char"

  • Qr-code-ver-10

    Version 10 (57×57). Content: "Version 10 QR Code, up to 174 char at H level, with 57X57 modules and plenty of Error-Correction to go around. Note that there are additional tracking boxes"

  • QR Droid 2663

    Version 25 (117×117 enlarged to 640x640)

  • Qr-code-ver-40

    Version 40 (177×177). Content: 1,264 characters of ASCII text describing QR codes

  • QRCode-1-Intro

    1 — Introduction

  • QRCode-2-Structure

    2 — Structure

  • QRCode-3-Layout,Encoding

    3 — Layout & Encoding

  • QRCode-4-Levels,Masks

    4 — Levels & Masks

  • QRCode-5-Protocols

    5 — Protocols

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SQR codes Facts for Kids. Kiddle Encyclopedia.