TMZ's Kardashian sources tell TMZ Kim decided to put the policy in place at the Hidden Hills home because she doesn't want it to be a target for thieves. In essence, she's throwing up her version of the bat signal ... NOTHING TO STEAL HERE!
TMZ was told Kim's huge collection of bling worth millions is being stored elsewhere -- under constant supervision -- with very elaborate security measures to get to it. And despite the lack of jewelry at their new place ... TMZ was told armed security's still on guard 24/7.
The move makes it clear ... the trauma of the Paris robbery is still on Kim and Kanye's minds. Especially with a new baby due this month.
As TMZ was reported ... there have also been a string of celebrity burglaries over the past year, with 'Real Housewives' Kyle Richards being the most recent victim.
Lesson learned for Kim.