A SURVEY ON SECURITY ATTACKS AND CHALLENGES IN BITCOIN

Bitcoin is the most successful crypto currency that has created a new division in the area of electronic financial transactions. Bitcoin provides a platform to run currency without any central control. It serves as both a peer-to-peer payment system as well as a store of value. Bitcoin records all its transactions in a distributed appendonly public ledger called block chain. In this paper, we present a systematic survey that covers the security aspects of Bitcoin. The purpose of this paper is to explore some of these security issues associated with the Bitcoin as well as suggest countermeasures to keep its transactions secure.