Blockchain Security Attack: A Brief Survey

Blockchain technology has attracted various areas like corporations, education, government, and healthcare because of its unhackable security features. In spite of common arguments about the occurrence of Blockchain technology in terms of security and privacy, in reality, several attacks can be launched against them. This paper presents a comprehensive survey of the most vulnerable Blockchain attacks and the different approaches proposed against these attacks. This paper also provides taxonomy of attacks, which are most challengeable to Blockchain security key features. Additionally, a review of the countermeasures, which have offered solutions to avoid these attacks, has been presented.