308 Copyright © 2012, IGI Global. Copying or distributing in print or electronic forms without written permission of IGI Global is prohibited. Chapter 14 Masoom Alam Institute of Management Sciences, Pakistan Mohammad Nauman Institute of Management Sciences, Pakistan Xinwen Zhang Samsung Information Systems America, USA Tamleek Ali Institute of Management Sciences, Pakistan Patrick C. K. Hung University of Ontario Institute of Technology, Canada Quratulain Alam Institute of Management Sciences, Pakistan Behavioral Attestation for Web Services Based Business Processes ABSTRACT Service Oriented Architecture (SOA) is an architectural paradigm that enables dynamic composition of heterogeneous, independent, multi-vendor business services. A prerequisite for such inter-organizational workfows is the establishment of trustworthiness, which is mostly achieved through non-technical mea- sures, such as legislation, and/or social consent that businesses or organizations pledge themselves to adhere. A business process can only be trustworthy if the behavior of all services in it is trustworthy. Trusted Computing Group (TCG) has defned an open set of specifcations for the establishment of trustworthiness through a hardware root-of-trust. This paper has three objectives: frstly, the behavior of individual services in a business process is formally specifed. Secondly, to overcome the inherent weaknesses of trust management through software alone, a hardware root of-trust devised by the TCG, is used for the measurement of the behavior of individual services in a business process. Finally, a veri- fcation mechanism is detailed through which the trustworthiness of a business process can be verifed. DOI: 10.4018/978-1-4666-1942-5.ch014