Researchers from two German universities have uncovered data in the Bitcoin Blockchain which could mean anyone who downloads it is breaking the law, The Guardian reports March 20.

In a paper published by two groups from Aachen and Frankfurt University, authors claim sexual images and links to child pornography attached to Bitcoin transactions has the potential to criminalize swathes of the nascent Blockchain industry.

“Bitcoin’s blockchain contains at least eight files with sexual content. While five files only show, describe, or link to mildly pornographic content, we consider the remaining three instances objectionable for almost all jurisdictions: Two of them are backups of link lists to child pornography, containing 274 links to websites, 142 of which refer to Tor hidden services,” the paper states.