New LM auto sniffing thru network

[Thomas]

My point of view is that the lack of security is one of the biggest KNX issues nowadays. I can imagine I visit a random bathroom in KNX based building, sit on a toilet, unscrew the PIR sensor, connect my laptop to KNX wires and start sniffing packets. I can sniff less or more depending on line couplers configuration but in general there's no way how to prevent me doing it.

I'm curious so my question is: Is there an alternative bus which is:
- cryptographically strongly secured
- Two wires based with power available in these wires
- Reliable in noisy environment
- Routable
- Allows mixing of topology (I mean line, star etc)
- Non master/slave model oriented