We are currently carrying out an in-depth study on wallet fingerprinting in Bitcoin, aiming to understand how different wallets — both software and hardware — shape transactions and what...
Transaction fees play a fundamental role in the proper functioning of the Bitcoin protocol. These fees act as an economic incentive for miners, who compete to create a block...
Introduction Detecting malicious activity in cryptocurrency networks like Bitcoin relies on datasets labeled with licit and illicit transactions. However, these datasets often suffer from class imbalance: the number of...
Accelerar la sincronització inicial de Bitcoin amb UTXO Set Tots ens hem trobat algun cop que el nostre node de Bitcoin deixa de funcionar, la raspberry falla, el disc...
Introduction Ring Signatures Overview The main idea behind ring signatures is that a user $u$, who is part of a user group $$R = {\,u_1,\,u_2,\,\dots,\,u_i},$$ can sign a message...
During my initial research period at UAB, I began developing a replica of the real Bitcoin mainnet. While this might sound unusual—especially given the existence of testnet and regtest...
📊 Bitcoin’s Decentralization: What the Data Really Says Bitcoin is intended to be a decentralized, trustless peer-to-peer currency. But how decentralized is the network, really, 15 years after its creation? This...
The Lightning Network (LN) is a dynamic and constantly evolving second-layer scaling solution for Bitcoin, designed to enable fast, low-cost transactions. Recently, the network has introduced the “[ERR] HSWC:...
By Ghazaleh Keshavarzkalhori, Cristina Perez-Sola, Guillermo Navarro-Arribas, Jordi Herrera-Joancomartí, and Habib Yajam In a world where data privacy is more important than ever, federated learning has emerged as a powerful way...
We are currently conducting research on wallet fingerprinting in Bitcoin. In this work, we delve on the way that several Bitcoin wallets construct and sign transactions, and we study...