Category Archives: Software Defined Radio

Rolling Code with Alzheimer’s

Decoding ASK/OOK and pwning a garage door opener

I’ve been getting into Software Defined Radio, and decide to have a go at hacking a simple radio device. First up I choose to play with a garage door opener. I bought a cheap kit from ebay from a UK based company. The system was advertised as ‘rolling code secure’, so I thought id get one Here’s a video from the sellers.

Rolling codes use algorithms like keyloq which using a rolling code system to ensure that codes cannot be captured and replayed. So the first thing I tried was to use a SDR to record the signal from the fobs and replay it. Surprisingly it worked.

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