
I think someone broke into a three drawer piece of furniture I have that has a lock. I read online that it is quite easy to do and quick too.
This is it:
https://imgur.com/a/sfWD9Vm

1. I would like to build in a new lock(is lock the term I'm looking for?)..
Something that can't be opened by using lock picking tools or a freakin paper clip in combo with something else.
Something that would need to be broken to get inside of. So I would know..
If i can get something for furniture that cant even be broken at all, even better
2. Do I need a lock with a cylinder? Do all have these? If not can i get one for furniture?
I read the best ones are with 15 or more steal pins and other pins that go in a sort of different opposite way(sorry, translating from another language and no EngIish terminology online) and under the right angle.
3. Is there a way to unscrew the outer part of the lock to get access? What kind of lock prevents that?
Do I need some 'protector' for the cylinder?
I need to make sure no part of the lock is visible, of course, apart from the key part.
Basically, what Im asking is if you could advise me on the best lock I could get for the drawer(pic above). I dont know if I can find all the locks where I live, but some general advice.
4. Also, does the drawer itself impose a security risk? Can something be done to it to get it out or sth that wouldn't damage it. Use your imagination

The lock locks all three drawers. Is it possible for the new lock to do the same? are there any security risks there that could be exploited?
5. And, very important, do all locks have their own specific key?? No one could go and buy the same lock you have? The threat is from within my house.. I dont know how the makers could make different locks/keys for everyone, but.. Then again, a lot of people buy the same locks..
I would really appreciate your advice.
Thanks!