Clients of permissionless blockchain systems, like Bitcoin, rely on an underlying peer-to-peer network to send and receive transactions. It is critical that a client is connected to at least one…
Read MoreAbstract. We focus on the problem of botnet orchestration and discuss how attackers can leverage decentralised technologies to dynamically control botnets with the goal of having botnets that are resilient…
Read MoreAbstract The arisen of Bitcoin has led to much enthusiasm for blockchain research and block mining, and the extensive existence of mining pools helps its participants (i.e., miners) gain reward…
Read MoreCryptocurrency off-chain networks such as Lightning (e.g., Bitcoin) or Raiden (e.g., Ethereum) aim to increase the scalability of traditional on-chain transactions. To support nodes in learning about possible paths to…
Read MoreThe temporal aspect of blockchain transactions enables us to study the address’s behavior and detect if it is involved in any illicit activity. However, due to the concept of change…
Read MoreIn 2020 Sala, Sogiorno and Taufer \cite{14} have been able to find the private keys of some Bitcoin addresses, thus being able to spend the cryptocurrency linked to them. This…
Read MoreRansomware attacks are among the most severe cyber threats. They have made headlines in recent years by threatening the operation of governments, critical infrastructure, and corporations. Collecting and analyzing ransomware…
Read MoreThe core of many cryptocurrencies is the decentralised validation network operating on proof-of-work technology. In these systems, validation is done by so-called miners who can digitally sign blocks once they…
Read MoreMany of the recent works on the profitability of rogue mining strategies hinge on a parameter called gamma ($\gamma$) that measures the proportion of the honest network attracted by the…
Read MoreThe Lightning Network (LN) has enjoyed rapid growth over recent years, and has become the most popular scaling solution for the Bitcoin blockchain. The security of the LN relies on…
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