Shadowing Model For Secret Key Extraction From WSN

We propose a new solution for key generation process on the basis of Received Signal Strength (RSS) for wireless sensor nodes. We use simulation environments to show that RSS at both the communicating parties is same due to high data transmission rates is a random characteristic and can be used to generate a secret key. We also try to show that how it can become vulnerable if proper care is not taken about the architecture of system. Few solutions were which were provided for the key generation like its pre-distribution and other key generation algorithms results in repetition of keys after particular interval. Pre-distribution means that provider has to imprint the legitimate key on product itself but such keys results in unreliable to end users. In our architecture design our key generation basis itself is different so it automatically will be helpful for us to design random secret key. Mathematical calculation capabilities of wireless senor nodes are limited so it’s unavoidable to use some adversary which will do calculations on behalf of them and provide a key. It’s well known to everyone now that random secret key generation and its authentic distribution will be an important characteristic of wireless networks. After we complete the generation of key we should be use very secured mechanism so that key can be distributed among wireless sensor nodes. Finally we show that, how RSS calculations are random as per the position of nodes in the network and how we have achieved so. Keywords—Received Signal Strength, ZigBee Sensor Nodes, Shadowing Model, 802.15.4, Shadowing Model