Chamberlain Security+ Garage Door Opener: What It Protects, What It Doesn’t
Security+ is the rolling-code encryption Chamberlain uses on its modern garage door openers. Here is what Security+ actually does, the attack it does not stop, and the physical security gap most Chamberlain owners don’t realize they have.
What Chamberlain Security+ Actually Is
Security+ is the name Chamberlain uses for its rolling-code remote encryption system. The original Security+ was introduced in 1997 to fix a real problem with older garage door openers: pre-1995 openers used fixed remote codes that could be captured with a code grabber and replayed to open the door. Anyone with $30 of cheap radio gear could record the signal when you opened your garage, then replay it later to get in.
Security+ solved this by using a different code every time the remote is pressed. The opener and remote agree on a synchronized sequence using a 32-bit rolling code (later upgraded to Security+ 2.0 with stronger encryption). Captured codes become useless within one button press because the next valid code is something different. This works exactly as intended.
If your Chamberlain (or Liftmaster, or Craftsman branded by Chamberlain) opener was manufactured after 1995, you have Security+ or Security+ 2.0. If it was made after 2011, you almost certainly have Security+ 2.0, which uses AES-128 encryption.
What Security+ Actually Protects Against
Security+ is well-engineered for the specific attack it was designed to defeat. That attack is electronic. The protection is real.
- Remote code capture and replay. Old fixed-code systems could be defeated with a $30 device that recorded the radio signal when you pushed your remote, then replayed it to open the door later. Security+ rolling codes make this attack useless within a single button press.
- Code guessing. Even at brute-force speeds, the 32-bit code space in original Security+ is too large to guess in a useful timeframe. Security+ 2.0 with AES-128 makes guessing functionally impossible.
- Casual radio sniffing. Even if someone intercepts your remote signal in transit, the captured code is invalidated the moment you press the remote again.
If you upgraded from a pre-1995 fixed-code opener to a Chamberlain Security+ unit, you closed a real vulnerability. That upgrade is worthwhile and the marketing claims are accurate. For the electronic threat model, Security+ does its job.
What Security+ Does Not Protect Against
The problem with Security+ marketing is that the name suggests broad security when the actual protection is narrow. Security+ defends against electronic attacks on the remote signal. It does not defend the door itself. The most common attack on a residential garage in 2026 is not electronic at all.
The 6-Second Emergency Release Exploit
Every federally-compliant garage door opener (including every Chamberlain, every Liftmaster, every Craftsman) is required by safety regulation to have a manual emergency release lever on the trolley. This is the red cord hanging from the opener that lets you disengage the door for use during power outages. The release lever sits inside the closed garage, but the lever itself can be reached from outside the closed door through the gap at the top weather seal.
The attack is straightforward: feed a stiff wire or coat hanger through the weather seal at the top of the door, hook the release lever, and pull. The opener disengages from the door. The door rolls up by hand. The whole process takes under ten seconds for someone who has done it before.
Security+ does nothing about this attack. The encryption protects the remote signal, but the attack does not use the remote signal. The attacker is not trying to fool the opener into opening the door. They are disengaging the opener entirely so the door is no longer mechanically locked to the opener motor. After that, the door just lifts.
The Honest Statement
Chamberlain’s Security+ system is excellent at protecting the remote control communication. It is not designed to protect the physical door, and it does not. The 6-second emergency release attack works on Security+ openers the same way it works on every other federally-compliant opener manufactured before roughly 2020.
What About Newer Chamberlain Models With Security+ 2.0?
Security+ 2.0 added stronger encryption (AES-128) and other improvements to the electronic system. The physical emergency release lever and its vulnerability are unchanged. Whether you have a 2008 Chamberlain or a 2024 Chamberlain, the wire-through-the-weather-seal attack works the same way on both, because the federal safety requirement for the emergency release has not changed.
Around 2020, some opener manufacturers began shipping units with redesigned emergency releases that are harder to access from outside the door. These are not specifically marketed as anti-break-in features, but if you have a Chamberlain opener manufactured after 2020 and installed by an authorized dealer, you may have a partially-mitigated release design. Most homes do not, because most openers in service today were installed before 2020.
How To Close The Gap On A Chamberlain Opener
The right defense for the 6-second exploit is not a better opener encryption system. The right defense is a physical block on the emergency release lever itself, so a wire fed through the weather seal cannot reach it.
Garage Shield is the patented original product in this category. Designed in Phoenix Arizona by a USMC disabled veteran, it bolts onto the trolley of compatible openers and physically encloses the emergency release lever. The Chamberlain opener works exactly the same for daily use. The emergency release still functions manually from inside the garage during a power outage. The wire-from-outside attack stops working because the wire cannot reach the lever.
Chamberlain Compatibility
Garage Shield fits virtually every major Chamberlain residential opener sold since the mid-1990s, including standard chain drive, belt drive, and jackshaft models. The same product also fits Liftmaster (Chamberlain’s commercial brand), Craftsman (manufactured by Chamberlain for Sears for decades), Master Mechanic, and Sears-branded units. Compatibility list and installation video are on the product page.
- $34.95, single one-time cost, no electronics or batteries
- Fits virtually every Chamberlain, Liftmaster, and Craftsman opener in service
- Installs in under 5 minutes without tools
- No interference with Security+ functions, remote operation, or app control
- No interference with manual emergency release from inside the garage
- Patented design, 500+ verified Amazon reviews, USMC veteran owned
Stacking Defenses On A Chamberlain Opener
The strongest residential garage door defense available combines three layers: the Chamberlain Security+ encryption you already have for remote signal protection, a Garage Shield for the 6-second exploit, and a slide bolt or deadbolt for vacation lockdown. Each layer covers an attack the others don’t. Together they push the cost-of-attack on your garage well above the cost on any neighbor’s, which is the actual goal of residential security.
Frequently Asked Questions
Is Chamberlain Security+ the same as Security+ 2.0?
Both use rolling-code encryption, but Security+ 2.0 (introduced around 2011) uses stronger AES-128 encryption and supports more advanced features like the MyQ smart home integration. Both protect against remote code capture and replay. Neither protects the door against physical attacks like the 6-second emergency release exploit.
How do I know which Security+ version my opener has?
Look at the back of the opener motor housing for a yellow learn button (Security+) versus a yellow learn button with a Security+ 2.0 logo or sticker. Openers manufactured after 2011 are generally Security+ 2.0. Older units installed in the 1995-2011 range are typically original Security+. Your owner’s manual or the Chamberlain support page can confirm based on the model number.
Can hackers break Security+ encryption?
In the broad sense, no. The encryption itself has not been publicly broken. There were a few academic vulnerabilities reported in early Security+ implementations, but Chamberlain has patched and updated the system over time. The far more practical threat to a residential garage is not the encrypted remote signal, it is the physical door itself.
Does Security+ stop the 6-second break-in?
No. Security+ protects the remote control signal. The 6-second emergency release attack does not use the remote control signal. The attacker manually disengages the opener from the door using a wire to trip the emergency release lever, then lifts the disconnected door by hand. Security+ has no role in defending against this attack because it is not an electronic attack.
Should I upgrade an older Chamberlain to a newer Security+ 2.0 model?
If your current opener is pre-1995 (fixed code), yes, upgrade for the electronic security benefit. If your current opener is post-1995 (Security+) and works fine, the upgrade to Security+ 2.0 provides marginal electronic improvement and doesn’t change the physical vulnerability. The dollars spent on a new opener may be better spent on a physical security upgrade like an emergency release shield plus a slide bolt for vacation lockdown.
Does the MyQ smart opener add security?
MyQ adds convenience and audit logs (notifications, remote access, geo-fencing, family sharing) but does not change the underlying physical vulnerability. The emergency release lever sits inside the garage regardless of whether the opener is controlled by a remote, a phone, or a keypad. Smart features are convenience features, not physical security upgrades.
Related Reading
Cover The Attack Security+ Doesn’t
Chamberlain Security+ protects your remote signal. Garage Shield protects the part of your opener that gets physically attacked. Patented, USMC veteran owned, made in Phoenix Arizona.