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Welcome to DISCRYPT, a dynamic research group from Universitat Autònoma de Barcelona dedicated to advancing knowledge in cybersecurity, cryptography, blockchain technologies, and data privacy.

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by satoshi
April 8, 2025
Bitcoin Scripting, Layer 1, Research, Signature Schemes, Transaction Security, Zero-Confirmation

Revisiting Double-spending Prevention for Bitcoin zero-confirmation transactions

Some time ago, we proposed a mechanism to address a long-standing issue in Bitcoin: the vulnerability of zero-confirmation (0-conf) transactions to double-spending attacks. Zero-confirmation transactions are transactions that merchants...
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by Gorka Pineda Burgueño
April 7, 2025
Bitcoin Core, Layer 1, Machine Learning, Performance Optimization, Research, UTXO Management

Using Machine Learning to Speed Up Bitcoin Core

We’ve recently submitted our latest paper to the 2025 7th International Conference on Blockchain Computing and Applications (BCCA), which will take place in Croatia. In this work, we explore how machine...
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by Pol Espinasa i Vilarrasa
July 4, 2024
Coinjoin, Layer 1, PSBT, Research, Sighash, UTXO Management

Grouphug – Batching transactions without interaction between users

How GroupHug works, a server programmed in Rust that allows grouping or batching of transactions without interaction between users using SigHash Single | AnyoneCanPay With the intention of trying...
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by Pol Espinasa i Vilarrasa
April 7, 2024
Bitcoin-Cli, Layer 1, PSBT, Research, Sparrow, UTXO Management, Wallets

How to make a transaction with UTXOs of different wallets with Sparrow

April 7, 2024 · 6 min · Pol Espinasa Let’s suppose that Bob and Alice share a flat and want to buy a television worth 2 bitcoins, paying half each. To do so,...
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Recent Posts

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  • Ring Signatures in Monero

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Focused on the design, analysis, and implementation of cryptographic protocols and privacy-preserving technologies for decentralized systems.

  • Edifici Q, Carrer de les Sitges, 08193 Barcelona
  • 935813049

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  • News
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  • Blogs
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Blogs

July 25, 2025
Wallet fingerprinting in Bitcoin and its privacy implications
July 25, 2025
Replace By Fee
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