Living Smart

030 031 I ENGINEERING & TECHNOLOGY business and your advertisement video can include a video code that transmits not only discount coupons but also a seasonal food guide with mouth-watering pictures. This is significant, as it enables businesses and consumers to interact whenever there are digital signage and displays, even when mobile data is unavailable, such as inside an airplane cabin, or at a crowded location, like inside an MTR carriage, where users frequently encounter slower network speeds due to limited bandwidth being shared by many people. Finally, video-embedded codes provide a third critical benefit over QR codes: vastly enhanced security. In the mainland and elsewhere, there have been cases where criminals have stolen funds from unsuspecting users by manipulating QR codes or even just by photographing codes with phone cameras. Why are video-embedded codes safer? A simple barcode or QR code contains very few data per pixel at tens or hundreds of bytes. A criminal can easily capture the entire code with phone cameras and can then easily manipulate the codes to create fake QR codes to steal funds from unsuspecting users. Meanwhile, video-embedded codes, by virtue of the multiple image frames and the considerably larger amount of data they contain, are much harder to “steal.” Current smartphone cameras are unable to record all the data embedded in these types of codes. As phone cameras continue to advance, however, future codes have to stay ahead to provide optimal security for users. From facilitating business interactivity between companies and consumers to allowing the public to make digital payments in a more secure way, video-embedded codes have a great potential to be widely adopted in Hong Kong. Published on April 24, 2019