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2. WhatsApp - Wikipedia

   en.wikipedia.org/wiki/WhatsApp

   In January 2015, WhatsApp launched a web client that allowed users to scan a QR code with their mobile app, mirroring their chats to their browser. The web client was not standalone, and required the user's phone to stay on and connected to the internet.

3. QR code - Wikipedia

   en.wikipedia.org/wiki/QR_code

   Whereas a barcode is a machine-readable optical image that contains information specific to the labelled item, the QR code contains the data for a locator, an identifier, and for web-tracking. To efficiently store data, QR codes use four standardized modes of encoding: (i) numeric, (ii) alphanumeric, (iii) byte or binary, and (iv) kanji. [4] Compared to standard UPC barcodes, the QR labelling ...

4. WhatsApp officially announces QR codes and animated stickers

   www.aol.com/whatsapp-officially-announces-qr...

   WhatsApp today announced a slew of new features that are set to roll out “over the next few weeks.” While people aren’t meeting up in person all that often these days because, you know ...

5. Unified Payments Interface - Wikipedia

   en.wikipedia.org/wiki/Unified_Payments_Interface

   As part of the Central Bank Digital Currency pilot project, Canara Bank has released the Unified Payments Interface compatible digital rupee mobile app. Without the need for a separate on-boarding procedure for CBDC for retailers, it will enable users to scan the existing UPI QR code and make payments using digital rupee.

6. WeChat - Wikipedia

   en.wikipedia.org/wiki/WeChat

   The company also provides WeChat for Web, a web -based client with messaging and file transfer capabilities. Other functions cannot be used on it, such as the detection of nearby people, or interacting with Moments or Official Accounts. To use the Web-based client, it is necessary to first scan a QR code using the phone app.

7. The Jester (hacktivist) - Wikipedia

   en.wikipedia.org/wiki/The_Jester_(hacktivist)

   When anyone scanned the original QR code using an iPhone or Android device, their device would silently make a TCP shell connection back to my remote server," The Jester wrote.

8. Reception and criticism of WhatsApp security and privacy ...

   en.wikipedia.org/wiki/Reception_and_criticism_of...

   A user who receives the message must delete the whole conversation to avoid crashing WhatsApp upon opening the conversation. [58] In early 2015, after WhatsApp launched a web client that can be used from the browser, Bhuyan found that the client had two new security issues: the WhatsApp photo privacy bug and the WhatsApp web photo sync bug.

9. End-to-end encryption - Wikipedia

   en.wikipedia.org/wiki/End-to-end_encryption

   Modern messaging applications can also display fingerprints as QR codes that users can scan off each other's devices. Endpoint security. The end-to-end encryption paradigm does not directly address risks at the communications endpoints themselves.