Advantage of Blockchain Technology_
                     Advantage of Blockchain Technology?
Advantage of blockchain technology: Distributed
        Since blockchain data is typically stored on thousands of devices in a distributed 
network, the system and data are highly resistant to glitches and malicious attacks. Each 
network node is capable of replicating and storing a copy of the database and, therefore, 
there is no single point of failure: a single point in the network being disconnected does 
not affect the availability or security of the network. network as a whole.
It does not lie
              Confirmed blocks are highly unlikely to be recoverable, which means that once 
data is recorded on the blockchain, it is extremely difficult to erase or change it. This 
makes blockchain a great technology for storing financial data or other data that requires a 
paper trail. Since each change is permanently tracked and recorded in a distributed and 
public ledger. For example, a company could use blockchain technology to prevent 
fraudulent behavior from its employees.   
Reliable system
           In most traditional payment systems, transactions depend not only on the two 
parties involved, but also on an intermediary, such as a bank, credit card company, or 
payment provider. Using blockchain technology, this is no longer necessary as the 
distributed network of nodes verifies transactions through a process known as mining. For 
this reason, the blockchain is often referred to as a non-transparent system. Therefore, a 
blockchain system solves the risk of trusting an organization. 
Disadvantage of blockchain technology
Blockchain technology is inefficient             
                   Blocks are very inefficient. Since mining is very competitive and there is only 
one winner every ten minutes, the work of the other miners is wasted. As miners are 
constantly trying to increase their computing power to have a better chance of finding a 
valid block hash, the resources used by the Bitcoin network have increased significantly in 
recent years.Right now the grid consumes more energy than many countries like 
Denmark, Ireland and Nigeria.
Private Keys
          Blockchain uses public keys or asymmetric cryptography to give users ownership of 
their cryptocurrency or other blockchain data. Every blockchain account or address has 
two corresponding keys: a public key that can be shared and a private key that must be 
kept secret. In fact, if a user loses his private key, the money is lost and there is nothing to 
do with it.
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