Forced to decide between disclosing a Tor vulnerability used to gather evidence or dismiss the child porn case it had built; the U.S. Department of Justice chose to protect the exploit.The undisclosed Tor vulnerability was used by the FBI to deanonymize user traffic to the Playpen child porn website hosted as a Tor hidden service. However, the evidence was deemed inadmissible by the court unless the FBI disclosed the method used to gather it
http://searchsecurity.techtarget.com/news/450414394/FBI-chooses-to-protect-Tor-vulnerability-and-dismiss-child-porn-case
Very interesting article Vaibhav. It’s amazing how the government considers the information of the Tor vulnerability to be a greater asset then prosecution of a child pornography case. Once can only hope that this knowledge that they are not willing to part with, will help in some greater causes! Just goes to prove the value of information!