Block chain Technology Intro, Benefits and Risks

Block chain Technology Intro, Benefits and Risks







A blockchain is a database distributed on many computers that securely documents digital transactions. The list of transactions is visible to all Blockchain subscribers. It is constantly being extended in chronological order, comparable to a chain in which all participating computers are integrated and to which new members are constantly added (hence the term "blockchain" = "block chain"). If one block is complete, the next one is created. Each block contains a checksum of the previous block.


opportunities and risks of Blockchain.


The most valuable chain in the world
If software developers were more romantic natures, the blockchain would probably have a more lyrical name. Instead of "block series" rather something with "beads" and "chain". Because that is the basic idea of ​​a blockchain: Like small crystalline deposits, individual elements combine to form a self-contained structure - a block. Once this object has reached its intended size, the next one emerges - and is connected to the predecessor. Thus, the individual blocks thread gradually to a tightly connected, precious chain on.

In one point, however, the digital block chain is fundamentally different from a string of pearls: every single record within a blockchain can be much more valuable than the real bead in a chain. More valuable even than all existing pearls and chains together. One day, experts predict, the Blockchain will even map the entire assets of the world.


This is how the blockchain works
Technically speaking, the blockchain is a distributed transaction database. The special feature is its structure: it grows, with one digital block hanging from the other. Each block has exactly one chronological predecessor and one chronological successor. There are no more connections between the blocks, but the links to the preceding and following blocks are unsolvable. This digital chaining creates a list that documents the values ​​of their users as well as all stored records at all times: a global trade repository.

This makes the blockchain a massive digital record that is chronologically updated and archives transfer activities within a network of participants - cryptographically sealed. In contrast to conventional databases, the blockchain is not on a single server, but is in a huge number identical: All participants of the network (so-called "nodes") have a complete, 100 percent identical copy of the complete block chain in their local memory ,



The main features of the technology:

An immutable trade repository is the central element of each blockchain.
All records are stored in a remote database, which is kept redundant on a number of computers (nodes) in the network.
The trade repository is strictly additive - nothing can be retroactively changed or removed. So the register grows as new records are added all the time.
Certain procedures ensure that only acceptable records are accepted and that the stored versions of the database are identical on all nodes.
Fully engineered, the Blockchain, with these attributes of security, authenticity, privacy, and accessibility, could be a revolutionary step forward for many business sectors and industries.


Risks

What are the hurdles?
For business applications on the Internet, trust in security and reliability is at the center of all considerations. Still there is no blockchain, which is accepted and used by all participants. However, this will change if the blockchain technology demonstrably works reliably over a longer period of time and is additionally integrated into an accepted legal and regulatory framework - also internationally. For example, banks are currently prohibited from providing data to unknown third parties (the nodes in the blockchain). And even central approaches to data protection (for example, the right to forget) can not be reconciled with the characteristics of Blockchain without appropriate solutions.

In addition, the bitcoin blockchain is too slow for many applications, because to ensure the security against manipulation by the unknown operators of the nodes, a highly complex process is necessary. If, on the other hand, one limited the number of participants so that the operators of the nodes were known and could be assumed to be trustworthy, the platform would be incomparably more efficient. Efforts in this direction - for example through the consortium of major international banks R3 - are already in place. However, such a consortium is precisely the central au


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