Theme: Using blockchain technologies in exchanging e-documents

Theme: Using blockchain technologies in exchanging e-documents.
Turdaliev Javokhir Botirali o’g’li
National University of Uzbekistan named after Mirzo Ulugbek,
e-mail: [e-mail]
In this article, we will discuss and discover about what is blockchain, and their three important concepts: blocks, nodes and miners.
Key words: Blockchain, miners, information security, security, decentralized, distributed, blockchain, bitcoins, blockchain technology, hash, distributed ledger, distributed ledger technology (DLT), cryptocurrency.
Blockchain, sometimes referred to as Distributed Ledger Technology (DLT), makes the history of any digital asset unalterable and transparent through the use of decentralization and cryptographic hashing. A simple analogy for understanding blockchain technology is a Google Doc. When we create a document and share it with a group of people, the document is distributed instead of copied or transferred. This creates a decentralized distribution chain that gives everyone access to the document at the same time.Blockchain consists of three important concepts: blocks, nodes and miners.
Every chain consists of multiple blocks and each block has three basic elements:The data in the block.A 32-bit whole number called a nonce. The nonce is randomly generated when a block is created, which then generates a block header hash. The hash is a 256-bit number wedded to the nonce.
Miners create new blocks on the chain through a process called mining.In a blockchain every block has its own unique nonce and hash, but also references the hash of the previous block in the chain, so mining a block isn't easy, especially on large chains.
Nodes can be any kind of electronic device that maintains copies of the blockchain and keeps the network functioning. Every node has its own copy of the blockchain and the network must algorithmically approve any newly mined block for the chain to be updated, trusted and verified.
In conclusion, blockchain technology creates a permanent and immutable record of every transaction. This impenetrable digital ledger makes fraud, hacking, data theft, and information loss impossible. While blockchain technology has reshaped and decentralized financial institutions, its application possibilities are far more robust.

References

1. "Beyond Bitcoin: Emerging Applications for Blockchain Technology", NIST, 2018. [Online]. Available: https://www.nist.gov/speech-testimony/beyond-bitcoin-emerging-applications-blockchain-technology. [Accessed: 05- Jul- 2018].
2. E. Zukerman, "Bitcoin Reviewed: Clever, Controversial Financial/Social Experiment", PCWorld, 2018. [Online]. Available: https://www.pcworld.com/article/230594/Bitcoin.html. [Accessed: 02- Jul- 2018].