Presently, I am trying to develop a fuzzy logic based cloud service trustworthiness model and listing a set of parameters for that purpose like security, availability, scalability etc.
You are on the right way. In all cases, the essential IT security goals comprise availibility/resilience (despite DoS attacks), authenticity (despite impersonation attacks), integrity (despite injection attacks), non-repudiation (despite repudiation attempts), and privacy (despite eavesdropping).
The Open Data Center Alliance, a consortium of cloud users and providers, published a document on Cloud provider assurance. I suggest looking at their list of requirements.
The Open Data Center Alliance, a consortium of cloud users and providers, published documents on Cloud provider assurance and cloud provider quality. I suggest looking at these lists of requirements. I have attached links to the two documents.
http://www.opendatacenteralliance.org/docs/Provider_Assurance_Rev2.0.pdf
http://www.opendatacenteralliance.org/docs/ODCA-PoC-Ent-Cloud-Service-Quality-Rev1-1-1.pdf
@Jeff Sedayao
If i propose a hybrid cloud framework and desire to check its trustworthiness, then what i should do in Fuzzy Logic?
@Muhammad Imran Tariq: A couple of suggestions. For the collections of criteria that have yes or no answers (with yes being good for trustworthiness) you could divide the number of yes answers by the total number of yes or no criteria, which would give you a "trustworthiness" value between 0 and 1, usable as a fuzzy logic variable. For the criteria that are a numbers and assuming that higher is better, divide that criteria by some theoretical maximum. That would again give you values between 0 and 1 which fits into a fuzzy logic scheme.
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