Introduction.- Wireless Network Overview.- Sensing Networks.- WSN Overview.- WBAN Overview.- WSN and Embedding System Relation.- Wireless Sensing Networks Contents.- .Wireless, Mobile, and Ad-hoc Networks.- .Book Organizing.- . SENSING AND ENVIRONMENT CONCEPTS.- Introduction.- Sensing Definition.- Environment Concepts.- WSN and Environment.- Environment and Medical Care Concerns.- WSNs and Sensors.- Sensing Examples.- WIRELESS NETWORKS.- Introduction.- Low-Rate Wireless Networks.- Bluetooth Networks Architecture.- Adaptive packets of WPAN technology.- THROUGHPUT STUDY OF LOW-RATE COMMUNICATIONS.- Introduction.- Related Work.- Throughput Definition of WSN and WBAN.- Analysis of PEP.- The Proposed Scenarios.- Simulation Assumptions.- Simulation Results.- Chapter Recommendation.- WSN SECURITY NEEDS.- Introduction.- Security goals.- Fundamentals of Network Security.- Challenges of WSN Security.- WSN Implementation Technologies.- Summary.- LOWER COMPLEXITY OF SECURED WSN NETWORKS.- Power with FEC.- Complexity FEC dependant.- Interleaving Techniques.- Interleavers Investigation.- Chaotic Interleaver Structure.- Cryptography using Chaos.- Objective quality Metrics.- Jakes Method.- Mobility Effects.- Cooperative Algorithm of WSN.- Appendixes.