Method for Ensuring Integrity of Aggregated Monitoring Data Using Blockchain Technology

Abstract

As the complexity of information systems increases and the requirements for
information security become more stringent, there arises a need not only for the collection and
analysis of monitoring data but also for ensuring their immutability over time. Traditional
monitoring systems do not provide protection against unauthorized modifications of metric
history, which limits their applicability in contexts that require transparent auditing. This work
proposes to address this issue using blockchain technology. The proposed approach involves
daily extraction of key monitoring metrics for the previous day, followed by hashing of the
aggregated data. The resulting hash is transmitted to a smart contract deployed on the public
Ethereum blockchain, where it is stored along with a timestamp. For verification, a software
module was developed that retrieves data from the monitoring system and compares their hash
with the one stored on the blockchain. A prototype implementation has achieved full automation
of the process of recording and subsequently verifying aggregated metrics. The verification
procedure reliably detects any data tampering by comparing hashes. While the proposed method
does not eliminate the risk of recording tampered data in the event of a trusted party being
compromised, it does ensure a transparent and immutable history of recordings, allowing for
retrospective detection of violations. A key advantage is its independence from the
organization's internal infrastructure and the ability to perform verification using open tools.