Immutable Log Storage as a Service

TL;DR

This paper introduces Logchain, a blockchain-based immutable log storage system that ensures secure, verifiable logs without a trusted third party, demonstrating scalability and speed when integrated with Ethereum.

Contribution

It presents a novel blockchain-based log system, Logchain, and its implementation as a service (LCaaS) on Ethereum, enabling scalable and fast log sealing.

Findings

Capable of processing 100 log files per second

Can seal a log file in 23 seconds on average

Ensures log immutability and verification without trusted parties

Abstract

Logs contain critical information about the quality of the rendered services on the Cloud and can be used as digital evidence. Hence, we argue that the critical nature of logs calls for immutability and verification mechanism without the presence of a single trusted party. In this paper, we propose a blockchain-based log system, called Logchain, which can be integrated with existing private and public blockchains. To validate the mechanism, we create Logchain as a Service (LCaaS) by integrating it with Ethereum public blockchain network. We show that the solution is scalable (being able to process 100 log files per second) and fast (being able to "seal" a log file in 23 seconds, on average).