I'm interested in finding out how modern car alarms (eg. Compustar
1000A) from a security point of view. Is there a technician or technical manual out there that could tell me the details? I can't seem to find a good writeup anywhere. Are there different protocols? Are they proprietary or open source? How does the remote communicate securely with the alarm system? Does it send a one-time code, or cycle through a number of shared keys? How does the alarm system deal with replay attacks? What are the cryptographic methods and the key lengths? What attacks are feasible now due to the increase in computer power that simply weren't a few years ago? Do the Europeans use different methods than North Americans? Etc.
Thanks a lot, Reid