Exploration of using Blockchaintechnology for forensically acceptableaudit trails with acceptableperformance impacts
Abstract: In this work, we will test the possibility to use Blockchain to preserve data suchas logs. Data inside Blockchain is preserved to be used as digital evidence. Thestudy will examine if Blockchain technology will satisfy the requirement for digitalevidence in a Swedish court. The study will simulate different test scenarios. Eachscenario will be tested on three different hardware configurations. The test has twomain categories, stream test and batch test. In stream test, we test performanceimpact on different systems in case each log is sent in a separate block. While inbatch test, we have two categories batch with data and batch without data. In thistest, we simulate sending 80GB of data each day. In total we send 80GB of data,but the difference here is that we change the time between each block and adjustthe size of the block. In our tests, we focused on three metrics: CPU load, networkbandwidth usage and storage consumption for each scenario. After the tests, wecollected the data and compared the results of each hardware configuration withinthe same scenario. It was concluded that Blockchain does not scale up in streammode, and it is limited to ten blocks/s regardless of hardware configuration. On theother hand, Blockchain can manage 80GB of data each day without stressing systemresources.
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