BLOCKCHAIN TECHNOLOGY

Overview

Blockchain technology is simply described as a power-allocated, distributed, digital recorder. By nature, data in the blockchain cannot be reversed, making it a legitimate obstacle to industries such as payment, cyber security and health care. 

What is it?

Blockchain, sometimes called Distributed Ledger Technology (DLT), makes the history of any digital assets consistent and transparent through power sharing and cryptographic hashing.

A simple analogy to understanding blockchain technology is Google Doc. When we create a document and share it with a group of people, the document is still distributed instead of being copied or transmitted. This creates a centralized distribution chain that gives everyone access to the document at the same time. No one is locked out waiting for changes from another party, while all doc changes are recorded in real time, making the change completely visible.

Blockchain has three key concepts: blocks, nodes and miners.

Blocks

The whole series contains many blocks and each block has three basic elements:

• Data in block.
• A whole number 32 called nonce. A nonce is generated randomly when a block is created, and then generates a block header hash.
• The hash is a 256-bit number wedded to a nonce. It should start with a large number of  zeroes(e.g., very small).

When the first chain block is created, the nonce produces a cryptographic hash. The information in the block is considered to be signed and permanently bound to the nonce and hash unless opened.

Miners

Miners make new blocks in the chain through a process called mining.

In blockchain all blocks have a different nonce and hash, but also refer to the hash of the previous block in the chain, so blocking the block is not easy, especially on larger chains.

Miners use special software to solve a surprisingly complex mathematical problem of finding a nonce that has adopted an accepted hash. Because the nonce has only 32 bits and the hash is 256, there are about four billion possible nonce-hash combinations to be excavated before the correct detection. When that happens the miners are said to have found a "gold nonce" and their block was added to the chain.

Making changes to any block at the beginning of the chain requires re-mining not only the block and the change, but all the blocks that will follow. This is why it is so difficult to use blockchain technology. Think of it as a safety statistic because finding gold nonces requires a lot of time and computer skills.

When the block is successfully mined, the change is accepted by all nodes in the network and the miner is rewarded financially.

Nodes

One of the most important ideas in blockchain technology is the distribution of power in certain areas. No single computer or organization can own a chain. Instead, a distributed ledge with locations connected to the series. Nodes can be any type of electronic device that stores copies of the blockchain and keeps the network running.

Every node has its own copy of the blockchain and the network must approve algorithm for any newly excavated block in order for the chain to be updated, trusted and validated. As blockchains are transparent, all actions in the ladder can be easily checked and viewed. Each participant is given a unique alphanumeric identification number that identifies their transaction.

Integrating public information with the testing and evaluation system helps the blockchain maintain integrity and build trust between users. In fact, blockchains can be thought of as a disgrace to technology.