How secure is Blackberry Persistence Store?

Question

with a 64 bit long as key and codesign, it's unbreakable, right?

Answer 1

It's unbreakable until someone convinces you they need your password to perform some routine maintenance.

It's unbreakable until you need to write down your password somewhere because it's so long and complicated that you can't remember it.

It's unbreakable unless you use your pet's name as a password.