Comment by GunlogAlm
There are no "100% safe" solutions. There will always be weaknesses and vulnerabilities in any system. The sort of criminal who requires or expects 100% safety is quickly going to be caught due to being a dullard. Knowing you're never truly "safe" is what good criminals are keenly aware of at all times: you can plan and prepare for certain eventualities. Once you think you're "safe", it's the beginning of the end.
Security is a process, not a "state".
You don't do something, once, and then are good to go forever. Banks don't just put cash in a safe and forget about it; they have audits, security guards, cameras, threat intelligence profiling criminal gangs, etc.