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![](https://photo.tg-me.com/u/cdn1.cdn-telegram.org/file/lmMQ170Sn_dxtKOe2NZEA2mDo_lTvKcU4mMbVtn2MgeXdNP4h5Q-XzzuWFqSvZjwiiE1o48pLxdlxXpJsgUQyqcWbSlQUe6Wvj8aMDgS2_iZhLfNn6JwYzFKOSRQY7duQu-hgHoHdKRsgr1K4szwTg7QAaKCMBGqrC-kfxYqgxxSwLgN21n0isn5B226PGGRjSfR0jMUGLEnIMNxi8GKR3a0onyOm9mPU2kfcxYfj46-DxrrDAnBWSKsN1vPU2QaUpi59MqilEZvcOyTsZg4uUPHHMxyoanmdIDPxdSxsXisdlBjhHec57WJoHAIdyidoUUSP92nvAa3yuWwW4ZXBQ.jpg)
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tg-me.com/DocOfCard/2136
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Telegram’s stand out feature is its encryption scheme that keeps messages and media secure in transit. The scheme is known as MTProto and is based on 256-bit AES encryption, RSA encryption, and Diffie-Hellman key exchange. The result of this complicated and technical-sounding jargon? A messaging service that claims to keep your data safe.Why do we say claims? When dealing with security, you always want to leave room for scrutiny, and a few cryptography experts have criticized the system. Overall, any level of encryption is better than none, but a level of discretion should always be observed with any online connected system, even Telegram.
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. “Once 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,” says Stacey Harris, consultant for Pelicoin, a network of cryptocurrency ATMs. Blockchain is decentralized, which means it’s not controlled by any one organization. “It’s like a Google Doc that anyone can work on,” says Buchi Okoro, CEO and co-founder of African cryptocurrency exchange Quidax. “Nobody owns it, but anyone who has a link can contribute to it. And as different people update it, your copy also gets updated.”
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