  With the advancement of cloud computing, data storage, and security have
become crucial. The growing adoption of cloud services by companies,
accompanied by increased threats from cybersecurity, highlights the importance
of privacy and ownership of user data. Between 2022 and 2023, there has been an
increase of around 48% in cloud security threats, emphasizing the urgent need
for strong security solutions. To face these challenges, in this project, we
propose integrating the Ethereum network's blockchain technology with a
database located in the PostgreSQL cloud. The proposed solution aims to provide
bidirectional data synchronization and strict control of access mechanisms.
Blockchain technology ensures immutability and transparency of transactions,
while PostgreSQL provides efficient and scalable storage. Through rigorous
testing in an adaptive traffic control scenario, the results obtained indicate
that this solution offers a significantly high level of security due to the
decentralization of data, confirming that this solution is effective, and
making it a powerful new option to improve security in cloud environments. In
conclusion, the solution proposed in this project not only increases
information security but also demonstrates the practical feasibility of
integrating blockchain with cloud relational databases. This two-way alignment
improves protection against cyberattacks and ensures that user data is
protected from unauthorized access and malicious changes.
