How do QR codes work—and what makes them dangerous
how do qr codes work Among the many changes brought about by the pandemic is the widespread use of QR codes, graphical representations of digital data that can be printed and later scanned by a smartphone or other device.
QR codes have a wide range of uses that help people avoid contact with objects and close interactions with other people, including for sharing restaurant menus, email list sign-ups, car and home sales information, and checking in and out of medical and professional appointments.
QR codes are a close cousin of the bar codes on product packaging that cashiers scan with infrared scanners to let the checkout computer know what products are being purchased.
Bar codes store information along one axis, horizontally. QR codes store information in both vertical and horizontal axes, which allows them to hold significantly more data. That extra amount of data is what makes QR codes so versatile.
ANATOMY OF A QR CODE
While it is easy for people to read Arabic numerals, it is hard for a computer. Bar codes encode alphanumeric data as a series of black and white lines of various widths. At the store, bar codes record the set of numbers that specify a product’s ID. Critically, data stored in bar codes is redundant. Even if part of the bar code is destroyed or obscured, it is still possible for a device to read the product ID.
QR codes are designed to be scanned using a camera, such as those found on your smartphone. QR code scanning is built into many camera apps for Android and iOS. QR codes are most often used to store web links; however, they can store arbitrary data, such as text or images.
When you scan a QR code, the QR reader in your phone’s camera deciphers the code, and the resulting information triggers an action on your phone. If the QR code holds a URL, your phone will present you with the URL. Tap it, and your phone’s default browser will open the webpage.
QR codes are composed of several parts: data, position markers, quiet zone and optional logos.
The data in a QR code is a series of dots in a square grid. Each dot represents a one and each blank a zero in binary code, and the patterns encode sets of numbers, letters or both, including URLs. At its smallest this grid is 21 rows by 21 columns, and at its largest it is 177 rows by 177 columns. In most cases, QR codes use black squares on a white background, making the dots easy to distinguish. However, this is not a strict requirement, and QR codes can use any color or shape for the dots and background.
Position markers are squares placed in a QR code’s top-left, top-right, and bottom-left corners. These markers let a smartphone camera or other device orient the QR code when scanning it. QR codes are surrounded by blank space, the quiet zone, to help the computer determine where the QR code begins and ends. QR codes can include an optional logo in the middle.
covid19 stmicroelectronics malaysia
covid19 stmicroelectronics malaysia The novel coronavirus, COVID-19, has had a significant impact on the world’s economy and businesses. One major organization that has been affected is STMicroelectronics (ST). This article will discuss the changes that ST has made in Malaysia due to the pandemic. It will look at how the company has reacted to the crisis, what strategies they have implemented in response, and how it affects employees of their Malaysian branch. covid19 stmicroelectronics malaysia
The coronavirus (COVID-19) pandemic has wreaked havoc on economies across the world, and Malaysia is no exception. As a result, many companies have had to make difficult decisions to help protect their employees and finances. This article takes an in-depth look at how the semiconductor manufacturer STMicroelectronics Malaysia has been affected by COVID-19 and the measures they are taking to mitigate its impact. covid19 stmicroelectronics malaysia
The Covid-19 pandemic has posed an unprecedented challenge to the global economy, with many companies struggling to remain afloat. One of those companies is STMicroelectronics Malaysia, a semiconductor company that is headquartered in Europe. With its commitment to digital transformation and innovation, the company has been able to navigate through the crisis, even as other firms have had to shut down or layoff employees. covid19 stmicroelectronics malaysia
microsoftled retracts disputed quantumcomputing paper
microsoftled team disputed quantumcomputing In a surprising turn of events, Microsoftled has retracted the paper it recently published on quantum computing. The research paper had been widely discussed in the scientific community due to its groundbreaking claims and potential implications for the future of quantum computing. However, subsequent investigations into the paper revealed discrepancies that led Microsoftled to retract their work, meaning that all results must be disregarded. This news has left many in the scientific world feeling confused and frustrated about this unexpected development. microsoftled retracts disputed quantumcomputing paper
In a surprising turn of events, Microsoftled researchers have announced the retraction of their recently published paper on quantum computing. The retraction comes after months of dispute and criticism over numerous elements of the paper, raising questions about the validity of the research. Microsoftled published the paper in December 2019 to great fanfare and excitement, touting the potential advances it could bring to quantum computing. However, several other researchers quickly called into question its scientific accuracy and validity. microsoftled retracts disputed quantumcomputing paper
Microsoftled has recently come under fire for a paper they published regarding a breakthrough in quantum computing. The paper, which claimed to have made immense strides towards high-performance quantum computing, has now been retracted due to criticisms from the research community. This article will explain why Microsoftled retracted their paper and what this means for the future of quantum computing. Many researchers were concerned with the validity of Microsoftled’s claims and questioned how it could have achieved such successful results without proper testing or verification methods.
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