Law enforcement officials in the US say they relied on sophisticated techniques for tracking Bitcoin transactions to take down “the largest child sexual exploitation market by volume of content.” It’s a reminder that criminals who think Bitcoin is a foolproof way to cover their tracks are mistaken. The news: US federal prosecutors have indicted 23-year-old Jong Woo Son of South Korea for operating a child pornography site called Welcome To Video. In addition to Son, who had already been arrested and convicted in South Korea on separate child pornography-related charges, 337 of the site’s users—residing in the US and ... (full story)