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2. What you need to know about QR code scams and how to ... - AOL

   www.aol.com/know-qr-code-scams-stay-204500807.html

   Trust your gut. Sharp instincts can also help users avoid the quishing traps. Be wary of improbable deals and emotional appeals, and never disclose personal information like Social Security ...

3. WeChat - Wikipedia

   en.wikipedia.org/wiki/WeChat

   WeChat or Weixin in Chinese ( Chinese: 微信; pinyin: Wēixìn ( listen ⓘ); lit. 'micro-message') [a] is a Chinese instant messaging, social media, and mobile payment app developed by Tencent. First released in 2011, it became the world's largest standalone mobile app in 2018 [4] [5] with over 1 billion monthly active users.

4. QR code - Wikipedia

   en.wikipedia.org/wiki/QR_code

   The QR code system was invented in 1994, at the Denso Wave automotive products company, in Japan. [5] [6] [7] The initial alternating-square design presented by the team of researchers, headed by Masahiro Hara, was influenced by the black counters and the white counters played on a Go board; [8] the pattern of position detection was found and determined by applying the least-used ratio (1:1:3 ...

5. Mobile payment - Wikipedia

   en.wikipedia.org/wiki/Mobile_payment

   QR, or "quick response", bar codes were designed to contain the meaningful information directly in the bar code. QR codes can be of two main categories: [ 49 ] [ citation needed ] The QR code is presented on the mobile device of the person paying and scanned by a POS or another mobile device of the payee

6. Check-in QR code - Wikipedia

   en.wikipedia.org/wiki/Check-in_QR_code

   The venue code (left) and digital sentry (right) used in Shanghai, China. The check-in code or the venue code ( Chinese: 场所 码, Chǎngsuǒgmǎ) is a QR code to record check-in locations for contact tracing and epidemiologic investigations. It was widely used in Australia and China during the COVID-19 pandemic in 2020–2022.

7. COVID-19 apps - Wikipedia

   en.wikipedia.org/wiki/COVID-19_apps

   Example proposal for a location-based COVID-19 contact tracing app: Contacts of individual A (and all individuals using the app) are traced using GPS co-localizations with other app users, supplemented by scanning QR codes displayed on high-traffic public amenities where GPS is too coarse. Individual A requests a SARS-COV-2 test (using the app ...

8. Health Codes (Chinese mobile app group) - Wikipedia

   en.wikipedia.org/wiki/Health_Codes_(Chinese...

   A red QR code will result in them being quarantined and unable to travel, for example, by being placed at home and having a seal placed on their door. Information leak. At the end of December 2020, "Beijing Healthbao" (Beijing's Health Code, 北京健康宝) was exposed to a personal information leakage incident. Its photos, ID card numbers and ...

9. QR code payment - Wikipedia

   en.wikipedia.org/wiki/QR_code_payment

   A QR code payment is a mobile payment method where payment is performed by scanning a QR code from a mobile app. [1] This is an alternative to doing electronic funds transfer at point of sale using a payment terminal. [2] This avoids a lot of the infrastructure traditionally associated with electronic payments such as payment cards, payment ...