The guide isn't available for free, in fact, it was being sold for Bitcoins on a deep web marketplace.
Bitcoin is cryptographic currency favoured by criminals as it allows semi-anonymous online transactions.
What's more surprising is that it's taken this long for officials and the press to raise the alarm.
Reports in the UK say that NSA engineers helped GCHQ develop the Optic Nerve program.
In questions during a conference at the Center for Strategic and International Studies, Comey revealed that cam-covering is commonplace at the FBI and other government offices.
"It's not crazy that the FBI director cares about personal security as well," he added.
Many have either claimed or speculated that one way the NSA and other U. spy agencies got around the prohibition of spying on Americans was to let a third party do it for them. News reports, based on the leaks of NSA information by Edward Snowden, say that GCHQ stored millions of images gleaned from its webcam surveillance.
According to the New York Times, the Australian Signals Directorate tapped a U. law firm representing Indonesian interests and offered their intercepts to the NSA. These images can be retrieved in various ways, including the use of advanced face recognition systems, so seemingly unrelated video chats from different computers and with different names or web addresses, can be linked together.
FBI director James Comey recently recommended that we all cover our webcams with tape for security reasons.