It might be applied for good and evil. Sometimes, a government does not want to give details because they want to reuse the method. Consider, for example, the F

It might be applied for good and evil. Sometimes, a government does not want to give details because they want to reuse the method. Consider, for example, the FBI found a vulnerability in Tor, and does not want to disclose it yet does want to prosecute the perpetrator behind Silk Road.