Abstract
Blockchain technology is an emerging technology that has the potential to change the way information is stored and transmitted. Its main components are the concepts of decentralization, transparency and distribution, which, in short, are the absence of any central control system between the source and the destination, the interdependence of the blocks used by the participating parties as a chain, and continuously, the registration and storage, and finally, authorization processes after authentication of the information it needs by means of a key belonging to the original owner, as in asymmetric encryption, with the possibility of any loss and at the time of need, stored at millions of points. The purpose of this summary is to discuss the application of information security for data transmission against cyber attacks in blockchain technology. Different methods of implementing security measures such as encryption, digital signatures and multi-signature transactions, different types of cyber-attacks that blockchain technology is vulnerable to and how to prevent these attacks has also been discussed. Also, the role of smart contracts in ensuring secure data transfer and the importance of developing secure protocols has been emphasized. In terms of security, it has also considered the future of blockchain technology and how it can be used to further increase the security of data transmission.
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