As long as I have been here and you called me an ass? You should know by now I wasn't being an ass. I could take your slight of the question asked of you and the way you answered as you being an ass.
But anyway it's three questions
This is in regards to diplomatic leaks.
Does it involved security?
and who is the secrecy protecting?
The People or the government?
Yes, it involves security, as explained below.
The secrecy is directly protecting sometimes the People first, sometimes the government and its credibility first, but the end result will always be an impact on the People. Some diplomatic transactions are back door channels for talks concerning actual or potential military and paramilitary matters - from Iraq, Afghanistan and Pakistan to allies like South Korea and involving everything from combat to NNP to joint training to arms sales. Some involve cooperation on intelligence, which if leaked could implicate the safety of military personnel, civilians or vital systems - not to mention the lives of intelligence personnel. Some are negotiations in pursuance of international law enforcement efforts, where other nations are cooperating with us in attempting to stop things like international drug cartels or human trafficking. Some involve relatively minor issues as far as we're concerned, but are conducted in secret by tradition or at the request of the other nations involved and our failure to safeguard that secrecy damages our credibility and therefore ability to get other nations to work with us on bigger issues of direct importance to the People, like the first few listed items. So directly or indirectly it all affects the People.
You won't find a much bigger advocate of the First Amendment and the rights of individuals on this board than I am, but there are things that must be kept secret for good reason. Because if they aren't people will get hurt and our nation will end up isolated and a pariah. It really is that simple.