Cryptocurrency is a secure, trustful and transparent digital currency which can neither be counterfeited nor be reversed arbitrarily by the sender. It eliminates the necessity of a third party involvement for the exchange, as it is encrypted and peer-to-peer virtual currency. For those who prefer non-disclosure and privacy, cryptocurrency is the solution. The use of this kind of virtual currency prevents any kind of identity theft. The concept of cryptocurrency has given birth to reliable e-cash.