Ethereum co founder Vitalik Buterin has publicly backed Tornado Cash developer Roman Storm, criticizing what he described as the criminalization of software development in an ongoing U.S. legal case. In a letter published this week, Buterin argued that Storm’s prosecution centers on writing and maintaining open source code rather than direct participation in illicit financial activity. Storm, a co founder of the non custodial crypto mixer Tornado Cash, was convicted in August on a money transmitting conspiracy charge and now faces a potential prison sentence of up to five years. He remains free on bail while awaiting sentencing. Authorities allege Tornado Cash was used to launder over one billion dollars in illicit funds, though a jury failed to reach verdicts on additional money laundering and sanctions related charges.
In his statement, Buterin framed privacy focused software as essential digital infrastructure rather than a niche political cause. He said privacy tools enable individuals to transact, communicate, and donate without creating permanent data trails stored by corporations or governments. Buterin noted that he has personally used Tornado Cash related software for legitimate purposes, including purchasing technical tools and supporting humanitarian causes. He emphasized that Storm’s work remained functional and reliable even after the developer stepped away, contrasting it with commercial technology products that prioritize marketing over durability. The Ethereum co founder argued that such software preserves protections that existed before widespread digital surveillance became the norm, rather than introducing radical new capabilities.
Support for Storm has grown across the crypto industry as enforcement actions against privacy tools intensify globally. Storm’s legal defense has raised more than $6.3 million, with contributions from the Ethereum Foundation, independent researchers, and policy groups spanning multiple blockchain ecosystems. The case has become emblematic of broader concerns that developers could face criminal liability for how third parties use open source code. As lawmakers and regulators debate the future of digital asset oversight, the outcome is being closely watched for its implications on software development, privacy rights, and the limits of liability in decentralized systems.
