A Comprehensive Block Chain – Inteprated Framework For Security Cloud Computing

Abstract

Due to its wide accessibility, cloud services are
susceptible to attacks. Data manipulation is a
serious threat to data integrity which can occur in
cloud computing – a relatively new offering under
the umbrella of cloud services. Data can be
tampered with, and malicious actors could use this
to their advantage. Cloud computing clients in
various application domains want to be assured
that their data is accurate and trustworthy. On
another spectrum, blockchain is a tamper-proof
digital ledger that can be used alongside cloud
technology to provide a tamper-proof cloud
computing environment. This paper proposes a
scheme that combines cloud computing with
blockchain that assures data integrity for all
homomorphic encryption schemes. To overcome
the cloud service provider’s (CSP) ultimate
authority over the data, the proposed scheme relies
on the Byzantine Fault Tolerance consensus to
build a distributed network of processing CSPs
based on the client requirements. After certain
computations performed by all CSPs, they
produce a master hash value for their database. To
ensure immutable data is produced, master hash
values are preserved in Bitcoin or Ethereum
blockchain networks. The master hash values can
be obtained by tracking the block header address
for verification purposes. A theoretical analysis of
the overhead costs associated with creating master
hash values for each ofthe cryptocurrencies is
presented. Wefound thatEthereum leads to
lowerclient financial costs and better online
performance than Bitcoin. We also specify the data
security requirements the proposed scheme
provides, the ground-level implementation, and
future work. The proposed verification scheme is
based on public cryptocurrency as a back-end
service and does not require additional setup
actions by the client other than a wallet for the
chosen cryptocurrency