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Indeed, Bitcoin bases its security on cryptography, that is, a technique that is used for the encryption of information using mathematics and for its accuracy in digital calculators.
This allows them to hide unmanageable information that is in full view of the public, but that cannot be understood or interpreted unless you have direct access and have the key that decrypts it only in this way.
In Bitcoin with every broad transaction you get a fully secure and supervised level of military-grade cryptography, as its algorithm in encryption programming called SHA-256 is a unique encoder for that algorithm.

Since its creation and conception, Bitcoin has been able to solve some of the main problems that they experienced in the initial projects of cryptocurrencies that they could not even solve.
And it has achieved it without the need to use a central entity based on its highly trained creators.
In this way, the same amount of money is prevented from being sent two or more times to different addresses to avoid fraud with hacker experts who are always looking for a way to infiltrate.

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Bitcoin was the solution conceived by the creator Satoshi Nakamoto. This person combined several security features, which allowed Bitcoin to be what it is today, secure and unhackable.
One of these is the chain of blocks or blockchain, it is an accounting book for the public that records each step one by one of the transactions that are carried out on the Bicoins platform in the networks.

These network nodes are the other part of Bitcoin where a copy of all existing block chains are kept.
These are constantly being updated every time a new block is attached, the approximate time is every 10 minutes.
If a node goes down or is turned off, it immediately stops working, so the network is not affected even if the attackers find out they will not be able to access the sources.

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This article was written by @oscardavid79 free of copyright