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Secure video calling is in high demand. As an alternative to Zoom, many people are using end-to-end encrypted apps such as WhatsApp, FaceTime or Signal to speak to friends and family face-to-face since coronavirus lockdowns started to take place across the world. Thereโs another optionโsecure communications app Telegram just added video calling to its feature set, available on both iOS and Android. The new feature is also super secureโlike Signal and WhatsApp and unlike Zoom (yet), video calls will be end-to-end encrypted.
How Does Bitcoin Work?
Bitcoin is built on a distributed digital record called a blockchain. As the name implies, blockchain is a linked body of data, made up of units called blocks that contain information about each and every transaction, including date and time, total value, buyer and seller, and a unique identifying code for each exchange. Entries are strung together in chronological order, creating a digital chain of blocks. โOnce a block is added to the blockchain, it becomes accessible to anyone who wishes to view it, acting as a public ledger of cryptocurrency transactions,โ says Stacey Harris, consultant for Pelicoin, a network of cryptocurrency ATMs. Blockchain is decentralized, which means itโs not controlled by any one organization. โItโs like a Google Doc that anyone can work on,โ says Buchi Okoro, CEO and co-founder of African cryptocurrency exchange Quidax. โNobody owns it, but anyone who has a link can contribute to it. And as different people update it, your copy also gets updated.โ
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