Understanding blockchain security. Blockchain Securities Institute works with governments to create certified programs.
Once information is stored on a blockchain, it is extremely difficult to change or alter it. Each transaction on a blockchain is secured with a digital signature that proves its authenticity. Due to the use of encryption and digital signatures, the data stored on the blockchain is tamper-proof and cannot be changed. All the data stored on a blockchain is recorded digitally and it has a common history which is available for all the network participants. In this way, the chances of any fraudulent activity or duplication of transactions are eliminated without the need of a third-party.
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