The ruling is a significant victory for ISPs and technology companies, preventing the chilling effect of over-policing user activity and fostering innovation. ### Background The case, *Cox v. Sony*, revolved around whether **Cox Communications**, an internet provider, could be held liable for copyright infringement committed by its users. The Fourth Circuit Court had previously upheld a billion-dollar verdict against Cox. The **Electronic Frontier Foundation (EFF)** filed an amicus brief urging the Supreme Court to reject this expansive theory of secondary copyright liability. ### Supreme Court Ruling The Supreme Court reversed the Fourth Circuit decision. Justice Thomas, writing for the majority, clarified that contributory liability is limited to situations where a defendant actively induces infringement or provides a product/service tailored for infringement. This framework aligns with the EFF's argument, drawing parallels from patent law where liability is recognized for actively inducing infringement or distributing a product lacking substantial non-infringing uses. The Court emphasized that mere knowledge of potential infringement by customers is insufficient for liability. Copyright holders must demonstrate that the provider intended its service to be used for infringement, either through active inducement or by designing the service specifically for unlawful uses. ### Implications for ISPs and Tech Companies The Court made it clear that providing general-purpose internet connectivity, capable of substantial lawful uses, cannot be treated as contributory infringement. The Court rejected the Fourth Circuit’s broader rule that supplying a service with knowledge it *may* be used to infringe is sufficient for liability. This decision prevents expansive theories of secondary liability that could chill innovation, threaten smaller technology companies, and undermine the development of general-purpose tools vital for lawful speech, creativity, education, and access to information. ### EFF's Stance The EFF has welcomed the Supreme Court's opinion, affirming its commitment to advocating for the public's ability to build, use, and innovate with new technologies. The ruling ensures that ISPs are not unduly burdened with policing user activity, allowing them to focus on providing essential internet services without fear of crippling copyright lawsuits. [Link to our amicus brief](https://www.eff.org/document/us-s-ct-cox-v-sony-eff-et-al-amicus-brief) [Link to the opinion](https://www.supremecourt.gov/opinions/25pdf/24-171_bq7d.pdf)