What is MacOS system folder "Jet" and file ".jetkey"?

I discovered a folder and file here...

System : iOSSupport : System : Library : Jet : *.jetkey.

I've searched online for them, and I've tried to delete the .jetkey file with no success. It doesn't appear to be anything malicious after a scan. So I'm curious what it is and what it does. It was created almost a year ago with no modifications after that date.

There's a Jetkey company which deals with smart locks, but I've never used one. The time of folder/file creation was around 3:30am, which doesn't make sense either.

Any idea? Thanks for your assistance.