Desanonimização de pagamentos com criptomoedas em sites de comércio eletrônico

Abstract

This work describes the functioning of cryptocurrencies and blockchains, taking Bitcoin as the main focus of study. It aimed to analyze the possibilities of loss of anonymity in purchases on websites, due to the presence of external trackers, using Bitcoin as a payment method. To analyze data leakage when using cryptocurrencies as a form of payment, studies were carried out on two works developed by professors at Princeton University, in which they exposed data leakage on a large scale. To demonstrate the loss of anonymity, an experiment was carried out, in which a purchase was made on a website, and the data leaked by trackers were identified. Once this was done, the data were compared with the Bitcoin network and it was possible to identify the payment transaction made on the site, using the data leaked by trackers, thus performing a deanonymization.