If the vulnerability was a so-called zero day, that would bring up all sorts of disclosure issues for the FBI.
Australian authorities hacked Tor users in the US as part of a child pornography investigation, Motherboard has learned.
The reason the government won't disclose its Tor Browser exploit? It's classified.
The FBI has so far declined to comment on whether it hacked computers outside of the US.
It's an early sign that other Playpen cases might face further legal challenges.
There's controversy over whether the warrant the FBI used to search suspects' computers is valid.
Special Agent Daniel Alfin likened the exploit to a defect in a lock, and argued that its particulars weren't necessary to the defense's case.
Law enforcement often don't know where a suspect is located before they deploy malware, opening up a whole load of possible ramifications.
A lightly redacted version of the warrant and supporting documentation for the largest known law enforcement hacking operation to date has been released.
Vithusan Puvaneswaran accessed the dark web site Playpen. Around a week after the FBI shut it down, he was arrested.