Recent advancements in wireless body area sensor networks (WBASNs) realize the evolution from a traditional desktop telemedicine platform to a wireless and mobile diagnosis system for delivering medical and healthcare services. In a WBASN, wearable or implanted medical sensors around the human body form a wirelessly interconnected network to collect an individual's medical information ubiquitously and to perform critical and complicated tasks collaboratively. Wireless Body Area Networks provide efficient communication solutions to the ubiquitous healthcare systems. Health monitoring, telemedicine, military, interactive entertainment, and portable audio/video systems are some of the applications where WBANs can be used. The miniaturized sensors together with advance micro-electro-mechanical systems technology create a WBAN that continuously monitors the health condition of a patient. For example, sensors have become smaller and more precise, and energy efficiency of radio circuits and microcontrollers has been improved considerably. Sensor networks that are composed of wearable or implanted sensors are also known as Body Area Networks (BAN) or Wireless Body Area Networks (WBAN) depending on how sensors are connected with each other. Wireless body area sensor networks low-power integrated circuits, and wireless communications have enabled the design of low-cost, miniature, lightweight, and intelligent physiological sensor nodes. These nodes, capable of sensing, processing, and communicating one or more vital signs, can be seamlessly integrated into wireless personal or body networks (WPANs or WBANs) for health monitoring. These networks promise to revolutionize health care by allowing inexpensive, non-invasive, continuous, ambulatory health monitoring with almost realtime updates of medical records via the Internet. Wearable health monitoring systems allow an individual to closely monitor changes in her or his vital signs and provide feedback to help maintain an optimal health status. If integrated into a telemedical system, these systems can even alert medical personnel when life-threatening changes occur. In addition, patients can benefit from continuous long-term monitoring as a part of a diagnostic procedure, can achieve optimal maintenance of a chronic condition, or can be supervised during recovery from an acute event or surgical procedure. Message Authentication is defined as „Provision of assurance that the message is not altered‟. Former is provided by Message Authentication codes (MAC) and this paper is provided by Hash functions. When MAC uses Hash function to generate authentication code it is called Hash based MAC (HMAC). Keywords: body area networks, BASN security, authentication

1. Raju Singh “Confidentiality & Authentication Mechanism for Biometric Information Transmitted over Low Bandwidth & Unreliable channel” School of Computer Engineering and IT, Shobhit University, Meerut, India Vol.3, No.2, March 2011
2. Honggang Wang, Hua Fang, Liudong Xing, Min Chen,” An Integrated Biometric-based Security Framework Using Wavelet-Domain HMM in Wireless Body Area Networks (WBAN)” IEEE Communications Society subject matter experts for publication in the IEEE ICC 2011 proceedings
3. Cory Cornelius “On Usable Authentication for Wireless Body Area Networks” Department of Computer Science Dartmouth College, Presented at HealthSec, August 2010
4. Mikael Soini, Jussi Nummela, Petri Oksa, Leena Ukkonen and Lauri Sydänheimo “Wireless Body Area Network for Hip rehabilitation” Tampere University of Technology, Department of Electronics, Rauma Research Unit pp. 202-206 (2009).
5. Jamil Y. Khan, Mehmet R. Yuce, and Farbood Karami “Performance Evaluation of a Wireless Body Area Sensor Network for Remote Patient Monitoring”
6. A. Soomro, D. Cavalcanti, “Opportunities & Challenges using WPAN and WLAN Technologies in Medical Environments”, IEEE Communications Magazine, vol:45, no:2, Feb 2007, page 114-122.
7. Mohammed Mana1, Mohammed Feham1, and Boucif Amar Bensaber2 “Trust Key Management Scheme for Wireless Body Area Networks”, International Journal of Network Security, Vol. 12, No. 2, PP. 71{79, Mar. 2011
8. M. R. Doomun and K. M. S. Soyjaudah,”\Analytical comparison of cryptographic techniques for resource-constrained wireless security," International Journal of Network Security, vol. 9, no. 1, pp. 82-94, July 2009.
9. Adnan Saeed, Miad Faezipour”Plug and Play Sensor Node for Body Area Network”, IEEE 2009
10. “Lin Yao1, Bing Liu1, Guowei Wu1, Kai Yao2, Jia Wang1, “A Biometric Key Establishment Protocol for Body Area Networks 1School of Software, Dalian University of Technology, Dalian, China,IEEE 2010
11. Jamil Y. Khan”Wireless Body Area Network for Medical Applications”,school of computer science,Australia,IEEE 09,07, 2009.
12. Mohammed Mana1, Mohammed Feham2, and Boucif Amar Bensaber3 “SEKEBAN (Secure and Efficient Key Exchange for wireless Body Area Network)”, ,International Journal of Advanced Science and Technology Vol. 12, November, 2009.
13. Emil Jovanov, Dejan Raskovic, John Price,John Chapman, Anthony Moore, Abhishek Krishnamurthy,” Patient Monitoring Using Personal Area Networks of Wireless Intelligent Sensors” IEEE 2008.
14. CHRIS OTTO, ALEKSANDAR MILENKOVIĆ, COREY SANDERS, EMIL JOVANOV,” SYSTEM ARCHITECTURE OF A WIRELESS BODY AREA SENSOR NETWORK FOR UBIQUITOUS HEALTH MONITORING”, Journal of Mobile Multimedia, Vol. 1, No.4 (2006) 307-326
15. Chao Chen and Carlos Pomalaza-Ráez,”Implimenting and EvaluatingA wireless body Sensor System for Automated Physiological Data Acquisition At Home”, International Journal of Computer Science and Information Technology, Volume 2, Number 3, June 2010.
16. Frank Agyei-Ntim, Member IEEE, Kimberly Newman, Senior Member IEEE, “Lifetime Estimation of Wireless Body Area Sensor Network for Patient Health Monitoring” 31st Annual International Conference of the IEEE EMBS Minneapolis, Minnesota, USA, September 2-6, 2009.
17. Adnan Saeed, Mehrdad Nourani, Gil Lee, Gopal Gupta and Lakshman Tamil” A Scalable Wireless Body Area Sensor Network for Health-Care Monitoring “, The University of Texas at Dallas, Richardson, Texas,IEEE 2007.
18. "Adnan Saeed*, Miad Faezipour*, Mehrdad Nourani*, Subhash Banerjee” A Scalable Wireless Body Area Network for Bio-Telemetry, Journal of Information Processing Systems, Vol.5, No.2, June 2009
19. Chris Otto, Emil Jovanov, “Wireless Sensor Networks for Personal Health Monitoring:Issues and an Implementation”Aleksandar Milenković, Accessed: July 2005.
20. Mehmet R. Yuce & Steven W. P. Ng & Naung L. Myo &Jamil Y. Khan &Wentai Liu, “Wireless Body Sensor Network Using Medical Implant Band” Received: 10 July 2007 / Accepted: 25 July 2007.

body area networks BASN security authentication