Everything about CryptoCurrency

A cryptocurrency can be defined as a virtual or digital currency which uses Cryptography as it's main theme. Cryptocurrency is almost non-vulnerable when it comes to security features. The key feature of a cryptocurrency is that it's not a centralized currency and not maintained by a central authority or government organization. So, this makes it impossible for any manipulations that are generally practiced by organizations like any central banks or Foreign Investors. 
Cryptocurrency's value is calculated by the supply and demand factor which is similar to the valuable metals like gold and silver. It is not controlled by any particular country or exchange as it's more like a Global currency. Each user is allotted with both the public and individual keys of their cryptocurrency as it makes more easy to maintain the security of the funds. 

Inception 

The first cryptocurrency is Bitcoin which is established in 2009. It was a huge success as the current price of Bitcoin is around 250$. It uses SHA-256 cryptographic hash which is developed by the NSA. Now, there are literally hundreds of other cryptocurrencies which are also referred to as Altcoins. In 2011, Litecoin was developed with some unique features such as the usage of scrypt rather than using the traditional SHA functionality.

What is a Hash?

Generally, cryptocurrencies are achieved through a process called Mining which uses some unique algorithms. The mining power is calculated on a rate of hashes per each second. A computer power of 1KH per second possess the mining power of 1000 hashes a second. Each and everytime, a block is solved by a miner another hash is created. The algorithm is more like a set of numbers gathered together and more likely impossible to decode it.

Security

The Cryptocurrency's security has two key parts. The first one depends on the Mining difficulty intersections which is connected to the miners. The second part is known as 51% attack. Miners who has the mining power exceeding 51% has the possibility of taking control of blockchain ledger and then creating a new alternate block chain. But, this 51% attacked do have some limitations of doing things. He can only reverse his transactions or can block others.