Robust Networking Architecture and Secure Communication Scheme for Heterogeneous Wireless Sensor Networks

Conceptual Design Performance Requirements O Efficiency of computation -computation of cryptographic keys and data encryption should be fast O Efficiency of communication protocol -data routing/relay should have low latency a Efficiency of energy -computation and communication tasks for security should not drain the limited power of the sensor nodes a Long network lifetime -networking architecture can be reconfigured

Conceptual Design ❑ Efficiency of computation – computation of cryptographic keys and data encryption should be fast ❑ Efficiency of communication protocol – data routing/relay should have low latency ❑ Efficiency of energy – computation and communication tasks for security should not drain the limited power of the sensor nodes ❑ Long Network lifetime – networking architecture can be reconfigured 11 Performance Requirements

Conceptual Design Security requirements a Data confidentiality -secure channel to prevent information leakage a Data integrity -data should not be altered when transmitted from node to node a Data freshness-data should be up-to-date w/o any replay of old messages a Authentication- verify identity of source a Availability -preserve energy while providing securit a Self organization -robustness to overcome node failures and node compromise

Conceptual Design ❑ Data confidentiality –secure channel to prevent information leakage ❑ Data integrity – data should not be altered when transmitted from node to node ❑ Data freshness – data should be up-to-date w/o any replay of old messages ❑ Authentication – verify identity of source ❑ Availability – preserve energy while providing security ❑ Self organization –robustness to overcome node failures and node compromise 12 Security Requirements

Conceptual Design General idea SINK H Send data back Hierarchical hMSNINaBatraatantissimsmliysibicbyrfihimdfigchitecture What is the optimal way to design robust hierarchical networking architecture to support resource efficient security for HWSNS?

H H Whatis the optimal way to design robust hierarchical networking architecture to support resource efficient security for HWSNs? 13 SINK Flat HWSN: Data transmission by flooding H H Send Data Back HierarchicalHWSN: Data transmission by hierarchical architecture Conceptual Design – General Idea

Conceptual Design Proposed Cluster-based Hierarchical Networking Architecture (CHNetArch) Cluster-head SINK H-node L-node Cluster Robust Networking Self- Formation Reconfiguration Data routing/relay Complete graph

14 H H H H-node SINK L-node H H H H-node SINK L-node H H H Cluster Cluster-head Cluster member H-node SINK L-node H H H Cluster Cluster-head Cluster member H-node SINK L-node Robust Networking Architecture Data routing/relay Self￾Formation Reconfiguration Conceptual Design – Proposed Cluster-based Hierarchical Networking Architecture (CHNetArch) Complete graph

Conceptual Design Proposed Secure Communication Scheme Secure Communication Scheme Design Shared Key Ke Secure Cryptographic L-node) Management Routing System Protocol Algorithms member K (L-node) distribution Management Public Key Shared Key cheme Protocol Cryptography Cryptography

15 H-node Cluster￾head (L-node) Cluster member (L-node) H-node Shared Key Public key Secure Communication Scheme Design Secure Routing Protocol Key Management System Cryptographic Algorithms Key Pre￾distribution Scheme Key Management Protocol Public Key Cryptography Shared Key Cryptography Conceptual Design – Proposed Secure Communication Scheme