It was a StackOverflow question he posted while creating Silk Road, in which he used his real name (before switching to the "frosty" alias in under a minute).

It was a StackOverflow question he posted while creating Silk Road, in which he used his real name (before switching to the "frosty" alias in under a minute). And his SSH key had both the username and hostname set to that alias ("frosty@frosty"), which is how they connected him to Silk Road. Specifically, it was this question: https://stackoverflow.com/questions/15445285/how-can-i-connect-to-a-tor-hidden-service-using-curl-in-php https://stackoverflow.com/questions/15445285/how-can-i-conne...