1. Cellular Server in a Smart Home
Yishai Burt
Yosi Gabay
Supervisor: Prof. Ran Giladi

2. EIB/KNX Introduction
The world's only open standard for home & building control.
Can work with a variety of media types, including twisted pair, power line, RF, IR and even Ethernet.
Decentralized -The components communicate with each other, Distributed.
Applications in: lighting, alarms, blinds/solar control, automatic window control, energy management and much more…

3. Our Inheritance Our Goals EIB Server EIB Server redesigned
Linux Only
RS232 only
Constant encryption key
Pocket Master Server
EIB Server redesigned
Cross-Platform
RS232 or EIBnet/ip
Diffie-Hellman
Standalone Library, General Client base class
SMS Server
AMX Server

4. Design – EIB Network Communication via RS232 (BCU)
Currently works only with Open Source Linux driver
Communication via UDP (EIB/net Router)
Cross Platform (Windows/Linux)
UDP Multicast (using known port and Multicast address)
Unsecure Messaging
No Encryption
No Authentication

5. Design – EIB Control Network
Client Authentication
User Name & Password
Data Encryption
Initial Private Key
Diffie-Hellman Implementation

6. Design – AMX Network AMX Network
Controls Audio/Video Devices
Separate Protocol within AMX Network
Message Translation (EIB <-> AMX)
Authentication
Encryption
Currently Not implemented

7. Implementation - General
Project Components
Standalone Library (.dll in windows, .so in linux)
Generic Base class for all clients
EIB Server implemented as a separate process
Multi Threaded
Can be executed as service
SMS Server implemented as separate process
Derived from Generic Client base class
RS232 interface to the cellular modem

8. Implementation – Diffie Hellman
Generating Random numbers Through CPU time-stamp
Miller-Rabin Algorithm to Determine Large Prime numbers
Massive numbers are calculated using the power chaining rule
Only correct messages are responded (avoiding port scanning)

9. Implementation – EIB Control Messages

10. Demonstration