The biggest change seems to be how manufacturers have responded to new electronic security risks. Older remote systems relied on simpler signals, while newer cars use more advanced encryption, rolling codes, and additional security checks. A few years ago, a neighbour was telling me how surprised he was when his new car required extra authentication before allowing certain functions. We ended up talking about the history of these devices, and I found this overview of the car key grabber technology while reading about the subject. What stood out to me was how much the conversation has shifted towards vehicle protection. These days, understanding the weaknesses of older systems is just as interesting as seeing how modern manufacturers try to prevent unauthorized access.
