Overview of Issues, Challenges and Various Attacks Executed on Blockchain Technology

Blockchains is one of the emerging technologies now a days. It has been popular because of its decentralized, peer-to-peer transaction and immutable properties. In this current scenario blockchain technology is suffering from various attacks such as Liveness Attack, Selfish Mining Attack, DAO Attack, BGP Hijacking Attack, Sybil Attack along with some scams which includes Ponzi scam, honeypot, and smart contracts vulnerability. In this paper, we have presented systematic overview of the issues and challenges blockchain technology is facing along with various types of attacks executed on blockchain technology