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  2. 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 ...

  3. 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. 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; the pattern of position detection was found and determined by applying the least-used ratio (1:1:3:1:1) in black ...

  4. Cryptocurrency - Wikipedia

    en.wikipedia.org/wiki/Cryptocurrency

    Another method is called the proof-of-stake scheme. Proof-of-stake is a method of securing a cryptocurrency network and achieving distributed consensus through requesting users to show ownership of a certain amount of currency. It is different from proof-of-work systems that run difficult hashing algorithms to validate electronic transactions.

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

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

    We'll send you a text or call you with a new code that needs to be entered at sign-in. The phone number we contact you with may be different each time. Enable 2-step for phone. 1. Sign in to your Account Security page. 2. Next to "2-Step Verification," click Turn on. 3. Select Phone number for your 2-step verification method. 4.

  6. Witchcraft - Wikipedia

    en.wikipedia.org/wiki/Witchcraft

    Concept The Witches by Hans Baldung (woodcut), 1508. The concept of witchcraft and the belief in its existence have persisted throughout recorded history. According to the United Nations Special Rapporteur on Extrajudicial, Summary or Arbitrary Executions there is "difficulty of defining 'witches' and 'witchcraft' across cultures—terms that, quite apart from their connotations in popular ...

  7. QRIS - Wikipedia

    en.wikipedia.org/wiki/QRIS

    QRIS. Quick Response Code Indonesia Standard (abbreviated as QRIS, the abbreviation being a play on keris, a traditional sword; Indonesian: Kode QR Standar Indonesia) is an Indonesian QR code standard developed by Bank Indonesia (BI) and Indonesian Payment System Association for cashless payments in Indonesia .

  8. Blockchain - Wikipedia

    en.wikipedia.org/wiki/Blockchain

    In another project, the company uses blockchain technology to track the emissions of climate-relevant gases and the amount of secondary material along the supply chain for its battery cell manufacturers. Domain names. There are several different efforts to offer domain name services via the blockchain. These domain names can be controlled by ...

  9. Deep linking - Wikipedia

    en.wikipedia.org/wiki/Deep_linking

    Web site owners who do not want search engines to deep link, or want them only to index specific pages can request so using the Robots Exclusion Standard (robots.txt file). People who favor deep linking often feel that content owners who do not provide a robots.txt file are implying by default that they do not object to deep linking either by ...

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