What is a SECURITY KEY, and is it safe ?

Greetings Kneedy2022,

Welcome to the Apple Support Communities. We see that you have a question about a security key.

Can you let us know more about your question? What security key are you referring to? The more detail you can provide, the better the chances of receiving a reply.

As a start, reviewing this resource might help: Use the built-in security and privacy protections of iPhone

Cheers.

Legitimate security keys or security tokens—physical devices used as factors for authentication—are generally safe, yes.