I don't know what's normal now but a long time ago, 1997, I moved with a complex with 300 garages each with a remote. I opened the remote to change the battery

I don't know what's normal now but a long time ago, 1997, I moved with a complex with 300 garages each with a remote. I opened the remote to change the battery and noticed only 8 switches for the code. 256 codes, 300 garages, drove around the complex opened 2 other garages. Even at 12 bits with 300 garages the odds are very high of a match http://en.wikipedia.org/wiki/Birthday_problem http://en.wikipedia.org/wiki/Birthday_problem