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  2. MetaMask - Wikipedia

    en.wikipedia.org/wiki/MetaMask

    MetaMask is a software cryptocurrency wallet used to interact with the Ethereum blockchain.It allows a user to access their Ethereum wallet through a browser extension or mobile app, which can then be used to interact with decentralized applications.

  3. Ethereum - Wikipedia

    en.wikipedia.org/wiki/Ethereum

    Ether (ETH) is the cryptocurrency generated in accordance with the Ethereum protocol as a reward to validators in a proof-of-stake system for adding blocks to the blockchain. Ether is represented in the state as an unsigned integer associated with each account, this being the account's ETH balance denominated in wei (10 18 wei = 1 ether). At ...

  4. Unstructured Supplementary Service Data - Wikipedia

    en.wikipedia.org/wiki/Unstructured_Supplementary...

    USSD is commonly used by prepaid GSM cellular phones to query the available balance. The vendor's "check balance" application hides the details of the USSD protocol from the user. On some pay as you go networks, such as Tesco Mobile , once a user performs an action that costs money, the user sees a USSD message with their new balance.

  5. Decentralized application - Wikipedia

    en.wikipedia.org/wiki/Decentralized_application

    A decentralised application (DApp, [1] dApp, [2] Dapp, or dapp) is an application that can operate autonomously, typically through the use of smart contracts, that run on a decentralized computing, blockchain or other distributed ledger system. [3]

  6. Ethereum Classic - Wikipedia

    en.wikipedia.org/wiki/Ethereum_Classic

    Ethereum Classic is a blockchain-based distributed computing platform that offers smart contract (scripting) functionality. [1] It is open source and supports a modified version of Nakamoto consensus via transaction-based state transitions executed on a public Ethereum Virtual Machine (EVM).

  7. Polygon (blockchain) - Wikipedia

    en.wikipedia.org/wiki/Polygon_(blockchain)

    Polygon (formerly Matic Network) is a blockchain platform which aims to create a multi-chain blockchain system compatible with Ethereum.As with Ethereum, it uses a proof of stake consensus mechanism for processing transactions on-chain.

  8. Toll-free telephone number - Wikipedia

    en.wikipedia.org/wiki/Toll-free_telephone_number

    A toll-free telephone number or freephone number is one number that is billed for all arriving calls. For the calling party, a call to a toll-free number from a landline is free of charge. A toll-free number is identified by a dialing prefix similar to an area code. The specific service access varies by country.

  9. IMSI-catcher - Wikipedia

    en.wikipedia.org/wiki/IMSI-catcher

    A virtual base transceiver station (VBTS) [5] is a device for identifying the temporary mobile subscriber identity (TMSI), international mobile subscriber identity (IMSI) of a nearby GSM mobile phone and intercepting its calls, some are even advanced enough to detect the international mobile equipment identity (IMEI).