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Posted on 2015-06-18 by Author admin

Garage door opener is the term typically used to refer to a motorized device that opens and closes a particular garage door. Coherent countermeasures that prevents garage door openers being broken into should follow defense and in depth security principles. There are two main types of technology for garage door opener security, they are:

- Dip Switch Technology
– Roll Code Technology

Dip Switch Technology

Dip switch technology basically involve the up/down position switches that enable it to communicate appropriate signals to the garage motor. The first garage door launched way back in the 1950`s remotes used only one radio signal, meaning that anyone owning a similar brand remote could easily gain access to your residence.

The term `DIP` COMES from the number of switches that are in you motor as well as in your garage motor which are linked to a designated circuit board. The number of switches are limited to 8, 12 or 16 switch operators. The remote will not function if the switches settings dont match the ones on the remote.

In as much as these switches provides garage door systems with 256 to 4, 0996 different codes, security was not at the forefront of their main goals: the main intention was to avoid disruption with other signals that existed nearby. Malefactors soon invented techniques to beat this rudimentary system by attempting myriad codes on the using a regular transmitter or sophisticated code grabbers and signals.


Easy to use
Good performance and good value
Cheaper compared to rolling code technology


Can easily be broken into.
Susceptible to replay or repeat attack

Roll Code Technology

Rolling code technology, uses a frequency signal that ranges between 300-400 MHz and unlike most transmitters relies on hopping technology prevalently referred to as rolling code. The rolling code relies on algorithms and cryptographic techniques which make it stand out from other technologies

Rolling code can pick from hundreds of millions of codes unlike its counterparts the analog dip switches. It works by sending out a code for the receiver each time you press the remote. This process uses a little computer transmitter chip that goes into both the remote and the receiver. When the transmitter sends a code, it generates a new code that the receiver will use in future to generate a new code. Each and every time you click the garage door remote to operate the designated garage door opener, the code gets changed and can be one out of a possible one billion codes.

Roll dip technology is the same protocol that can be implemented in many internet protocols and car security alarms.


Prevents criminals from logging your codes and replaying it on the garage door opener.
Implements the latest in technology.
Code gets altered each and every time so its hard to guess.
Only the garage`s specific remote can be used to open the door.


Can be broken using super intensive brute force attacks
Might also be susceptible to power analysis attacks


Whilst the dip switch might be technology that was invented long ago still proves to instrumental in some security systems to date. Its innovative counterpart, the roll code is also a superb tool for anyone who wants superb garage security systems.

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