Posted by : Rohit Hazra Thursday, March 22

Invented by the Toyota subsidiary Denso Wave in 1994 to track vehicles during the manufacturing process, the it is one of the most popular types of two-dimensional barcodes. It was designed to allow its contents to be decoded at high speed.

Hello readers,
Today I will like to tell you about the QR Code.
QR Code (abbreviated from Quick Response Code ) is the trademark for a type of matrix barcode first designed for the automotive industry. More recently, the system has become popular outside of the industry due to its fast readability and large storage capacity compared to standard UPC barcodes . The code consists of black modules arranged in a square pattern on a white background. The information encoded can be made up of four standardized kinds ("modes") of data (numeric, alphanumeric, byte/binary, Kanji ), or through supported extensions, or virtually any kind of data.

A Malicious QR Code combined with a permissive reader can put a computer's contents and user's privacy at risk. This practice is known as"attagging", a portmanteau of "attack tagging". They are easily created and may be affixed over legitimate QRCodes. On a smartphone , a user would easily allow the reader for the use of the camera, full internet access, read/write contact data, GPS , browser history, read/write local storage, and global system changes.


Risks include linking to dangerous websites with browser exploits, enabling the microphone/camera/GPS and then streaming those feeds to a remote server, analysis of sensitive data (passwords, files, contacts, transactions), and sending email/SMS/IM messages or DDOS packets as part of a botnet , corrupting privacy settings, stealing identity, and even containing malicious logic themselves such as JavaScript or a virus.

These actions may occur in the background while the user only sees the reader opening a seemingly harmless webpage.
In Russia, a malicious QR Code caused phones that scanned it to send premium texts at a fee of USD$6 each.
You can encode (create) a QR Code from here : Here.

You can decode (read) a QR Code from here : Here


Use the following free apps by platforms :

  • QR Midlet (Java J2me s40),
  • BeeTagg (Symbian s60, Anna, Belle),
  • QR Droid (Android),
  • QR Code Scanner Pro (Blackberry),
  • Windows QR code reader (Windows Phone).

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