Big media companies have been trying to catch pirates by trying to track down people trading the movies or music. But Paul Kocher is trying a different way. “Instead of trying to track everyone’s habits and patterns, Kocher’s code would create a forensic trail to allow law-enforcement authorities to hunt down criminals – but only after there is evidence that illegal copies have been made. Says Kocher: ‘We’re trying to create a system where there will be consequences if people don’t obey the laws, but anonymity will be protected if they do’.”