Strange search terms being used

[dvp311]

I really don't know where else I could ask this, the most popular search term on my website is "frnepu ragver fgber urer..."

I know its probably some sort of bot, but when I google the term, the only result in English is something about password hashing, is this a possible breach attempt? It's happening several times a day

Thanks in advance

[Pronto]

Maybe you got Ctulhu as you prospective customer?

Or it's just Rot13 message. Try this page for translation: http://www.rot13.com/

I have no idea why somebody uses Rot13 message for search however.