Being familiar with the USG classification system, I was thrown off by the beginning of this article. It doesn't sound like something that would be classified merely as Secret.
The article begins with:
> XKeyscore (XKEYSCORE or XKS) is a secret computer system used by...
This should be edited to:
> XKeyscore (XKEYSCORE or XKS) is a classified computer system used by...
Because Wikipedia. My edit got immediately auto-bot-reverted[1] by some anti-vandalism crusader. Insert bell-curve meme[1] where "just edit wikipedia" is the middle of the bell-curve.
If you want someone to be actually pedantic about it, then no system is ever classified. Knowledge of the system might be classified, the system may be accredited to handle classified data, at some level. The data this system allegedly collects is obviously unclassified and only becomes classified after landing in some data lake.
Information is classified not anything else. All of that to say, this is one of the many secret computer systems the nsa allegedly has. As the Wikipedia article clearly indicates
The article begins with:
> XKeyscore (XKEYSCORE or XKS) is a secret computer system used by...
This should be edited to:
> XKeyscore (XKEYSCORE or XKS) is a classified computer system used by...
The program is allegedly a Top Secret program.