There are three types of freedom: 1) National freedom, 2) Political freedom, and 3) Individual freedom. History is full of examples of where none, one, two, or all three have been volutarily given up in order to be safe. Today, in America, we have given up none of them; in the old Soviet Union, the people gave up political and individual freedom; in Judea, during the Roman conquest, the Jews gave up National freedom, but not political or individual freedom (at least until the Zealots started their revolt).
There is no question America is in no danger of giving up National or Political freedom, so what is under consideration is Individual Freedom. It seems to me the measure of that are the first eight Amendments to the U.S. Constitution.
At the moment, I don't think our right to religious freedom, free assembly, petition the government, and a free press are being suppressed. I also don't think Amendments II, III, V, VII, or VIII are in trouble either.
I do, however, think an argument can be made that Amendments IV (unreasonable search and seizure) and VI (the rights of a defendent) are under serious attack in this country, some in the name of Security, and some in the name of a misplaced sense of "Justice".