How cryptography is used to monitor the spread of COVID-19

On April 10, Apple and Google announced1, 2 that they were joining forces in an effort to help reduce the spread of COVID-19. Their solution leverages Bluetooth technology to trace interactions between individuals. This principle is known as contact tracing and public health agencies are heavily relying on it to monitor and prevent the spread … Continue reading How cryptography is used to monitor the spread of COVID-19

Passive Decryption of Ethereum Peer-to-Peer Traffic

Ethereum, a popular cryptocurrency, utilizes a P2P flood network overlay protocol in order to propagate new transactions and state around the network. As has been shown in previous works[^1][^2], observing the propagation of transactions through the peer-to-peer network layer is often enough to deanonymize users of cryptocurrency networks....