It probably is.

A few months ago I was making a news ticker with headlines sourced from hnrss. I had used 'security' as a keyword and posts with score above 100.

I was looking for other sources that provide security news and stumbled upon this one too. What I saw was all posts looked quite similar to the rss filter from hnrss, except all articles were re-written in a slightly different way.

It was all just redundant news from the hnrss feed and other popular security bloggers.