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2. Google Authenticator - Wikipedia

   en.wikipedia.org/wiki/Google_Authenticator

   Typical use case Previous logo. The app is first installed on a smartphone to use Authenticator. It must be set up for each site with which it is to be used: the site provides a shared secret key to the user over a secure channel, to be stored in the Authenticator app. This secret key will be used for all future logins to the site.

3. QR code - Wikipedia

   en.wikipedia.org/wiki/QR_code

   QR codes can be used to generate time-based one-time passwords for electronic authentication. Loyalty programs. QR codes have been used by various retail outlets that have loyalty programs. Sometimes these programs are accessed with an app that is loaded onto a phone and includes a process triggered by a QR code scan.

4. Add or disable 2-step verification for extra security - AOL Help

   help.aol.com/articles/2-step-verification...

   4. Select Authenticator app for your 2-step verification method.-To see this option, you'll need to have at least 2 recovery methods on your account . 5. Click Continue. 6. Scan the QR code using your authenticator app. 7. Click Continue. 8. Enter the code shown in your authenticator app. 9. Click Done. Sign in with 2-step for authenticator app. 1.

5. Help:Two-factor authentication - Wikipedia

   en.wikipedia.org/wiki/Help:Two-factor_authentication

   Two-factor authentication ( 2FA) is a method of adding additional security to your account. The first "factor" is your usual password that is standard for any account. The second "factor" is a verification code retrieved from an app on a mobile device or computer. 2FA is conceptually similar to a security token device that banks in some ...

6. WhatsApp - Wikipedia

   en.wikipedia.org/wiki/WhatsApp

   WhatsApp also began rolling out support for sending login codes to a linked email address, rather than via SMS. In a later update on November 30, WhatsApp added a Secret Code feature, which allows those who use locked chats to enter a unique password that hides those chats from view when unlocking the app.

7. Unified Payments Interface - Wikipedia

   en.wikipedia.org/wiki/Unified_Payments_Interface

   www .upichalega .com. Unified Payments Interface, commonly referred to as UPI, is an Indian instant payment system as well as protocol developed by the National Payments Corporation of India (NPCI) in 2016. The interface facilitates inter-bank peer-to-peer (P2P) and person-to-merchant (P2M) transactions. [1] [2] It is used on mobile devices to ...