  The advent of blockchain technology by the Nakamoto group in 2008 has created
a new trend on how to deal with various security issues and vulnerabilities.
Blockchain systems have gained momentum in various spheres of technology
deployment in business organizations. This paper presents a critical literature
survey on the security strength of blockchains and security issues associated
with blockchain technology deployment. Numerous studies have experimented with
the various technical features of blockchain systems across various transaction
domains. Findings obtained from the literature survey and thematic content
analysis of the existing research studies indicate that blockchain systems
provide unique capabilities that support processes and transactions across
various sectors with a high level of integrity, transparency, confidentiality,
and privacy. However, some loopholes and limitations associated with the
deployment and use of blockchains have been highlighted in various studies. The
present study cross-examined the security issues of the underlying scientific
research evidence.
