Report Need ideas for a secure short range (3m) wireless system. in Electronic Projects Design/Ideas Posted July 12, 2013 So, I am working on an alarm system for my bike. As apart of that system, I would absolutely love to have it recognize me from a short distance, say 1 to 2 meters away, and deactivate the alarm and turn the accessories on. For that to work, I would obviously have to keep something on me that could either be read by the bike or something that could send a signal to the bike.My current thought is to use a micro controller to create a public private key pair. It would of course transmit the public key that the device I have on me will use to encrypt a secret password known only to device on me and the bike.How can I do something like this?Can anyone think of a way of doing this with out having to carry around a brick sized device? It would really be nice to just shove something in my wallet.Does anyone have any other ideas on how to something similar?Thanks!