Ethereum co-founder Vitalik Buterin has donated 50 ETH (around $170,000) to the legal defense fund of Tornado Cash developer Alexey Pertsev, significantly boosting a community fundraising campaign for the embattled privacy protocol developer. The on-chain transfer was made on December 31 via the Juicebox funding campaign dedicated to Pertsev’s legal costs, bringing the total raised to more than 184 ETH at that time. Pertsev, one of the main developers behind Tornado Cash, was arrested by Dutch authorities in 2022 and later convicted of money laundering in May 2024 in the Netherlands, receiving a sentence of more than five years in prison, which he is appealing. In parallel, U.S. prosecutors have charged fellow Tornado Cash developers Roman Storm and Roman Semenov with money laundering, sanctions violations, and related offenses tied to the protocol’s alleged use by entities such as the North Korean-linked Lazarus Group. Buterin’s donation follows earlier contributions he made to defense funds for Tornado Cash developers, and forms part of a broader, controversial debate over whether writing and publishing open‑source code for privacy tools should be treated as a criminal act when those tools are later used for illicit purposes. The donation underscores ongoing tensions between privacy, financial censorship, and regulatory enforcement in the crypto space. Supporters argue that prosecuting developers for the actions of protocol users poses a threat to open-source development and technological innovation, while regulators and law enforcement emphasize Tornado Cash’s role in large-scale money laundering and sanctions evasion. The sizable contribution from one of Ethereum’s most prominent figures both draws attention to Pertsev’s appeal and signals how central the legal outcome may be for the future treatment of privacy-focused smart contracts and their creators.

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