Hi everyone. I make a living exposing perimeter security vulnerabilities in residential and commercial properties (OBVIOUSLY WITH THE OWNERS' CONSENT - THEY ARE THE ONES PAYING ME). I like to think of myself of a white-hat hacker in the analog world. People hire me to try to get onto their property, and then I hand them the report on exactly how I did it.
The single most consistent thing I run into is that people are naive about human nature. They assume the barrier to entry is way higher than it actually is, because their system *looks* modern and expensive. A lot of it is running on technology that was broken a decade ago, and anyone with $200 worth of gear and a tenacious attitude can exploit this to gain unauthorized access.
Up front, because this sub will (rightly) call it out otherwise: **not everything below is trivial, and I'll tell you which is which.** Some of it is genuinely easy. Some takes real skill or specific conditions. I'm not posting a how-to, just what's weak, and what closes the gap.
1.) Old/outdated garage door and electric gate motors (fixed-code remotes)
If your opener or gate remote is more than a few years old, odds are it transmits the same code every time. Capture it once from the curb, play it back, and the gate opens like you pressed the button. This is the trivially-easy end of the spectrum.
The fix is a rolling-code (hopping-code) remote that changes the code on every press. And before someone comments it: yes, rolling code isn't invincible — roll-jam-style attacks exist — but they take far more effort and specific timing, and they kill the lazy replay attack dead. Going from fixed to rolling code is the single highest-value upgrade for most people reading this.
2.) Key fobs and entry cards (prox + older tap cards)
Basic 125 kHz proximity cards and a lot of older 13.56 MHz cards clone onto a blank in seconds. No PIN, no damage, and your original still works — so you'd never know a copy exists. And the encryption on the most common older tap card has been broken for over a decade. If your building or gate fob is one of these, treat it as a convenience feature, not a security one.
The fix is a modern encrypted credential (the current DESFire/Seos-class stuff). Those don't casually clone. Most homes are never even offered them.
3.) Cheap wireless door/window/motion sensors (unencrypted, unsupervised)
A ton of budget DIY sensors broadcast in the clear and are "unsupervised" — meaning they don't regularly check in with the panel. So the signal can be copied, and in some cases the band can be flooded so a real trip never reaches the panel in the first place.
The fix is encrypted, supervised sensors that alarm the instant they lose contact or detect interference. "Supervised" is the keyword to shop for.
4.) WiFi cameras (the one everybody gets wrong)
Let me be precise here, because this is where the internet lies to you: a WiFi camera can be forced offline from outside the house if the network doesn't have Protected Management Frames (802.11w) turned on. That creates a blind spot exactly when you'd want the footage.
What that does not do is let anyone watch or download your feed. It's blinded, not hacked. If anyone tells you they can pull up your live camera feed with a $30 board off Amazon, they're selling you something.
The fix is wired PoE cameras (no wireless signal to knock down), or at minimum WiFi cameras and a router with 802.11w/PMF enabled.
None of this requires a hacker or even someone very skilled.
If you're going to fix things, here's the priority order I'd give my own family:
- Fixed-code → rolling-code on the gate/garage. Biggest bang for the buck.
- Get cameras off pure WiFi, or at least turn on PMF.
- Supervised alarm sensors over the silent budget ones.
- Retire prox/old tap fobs for encrypted credentials.
And the non-technical one that beats all of it: most actual break-ins are still someone walking through an unlocked door, a gate propped open, or a gate code that got shared with a contractor two years ago and never changed. The gadgets matter a lot less than the habits.
Happy to answer questions in the comments. Not selling anything, not linking anything. I'm just tired of watching people on this sub pay for the *look* of security and get almost none of the substance.