Page 814 - Cloud computing: From paradigm to operation

5 Intercloud and interoperability

Appendix I

Use case of trusted inter-cloud computing
(This appendix does not form an integral part of this Recommendation.)

I.1 Use case template
The use cases developed in Appendix I should adopt the following unified format for better readability and
convenient material organization.
Title Note: The title of the use case

Description Note: Scenario description of the use case
Roles Note: Roles involved in the use case
Figure (optional) Note: Figure to explain the use case, but not mandatory
Pre-conditions (optional) Note: The necessary pre-conditions that should be
achieved before starting the use case
Post-conditions (optional) Note: The post-condition that will be carried out after
the termination of current use case
Derived requirements Note: Requirements derived from the use cases, whose
detailed description is presented in the dedicated
chapter

I.2 Trusted inter-cloud related use cases

I.2.1 Use case of access security in trusted inter-cloud

This use case illustrates the security aspects of trusted inter-cloud between the primary CSP and secondary
CSPs. The intermediary pattern of inter-cloud used to illustrate the use case is an example only.

Table I.2.1 – Access security in trusted inter-cloud

Title Access security in trusted inter-cloud
Description – The CSC requests secure and malware free software as a service (SaaS).
– The primary CSP in an inter-cloud intermediary pattern (acts as
CSP(Intermediary)) is the contact point for CSC.
– The CSP(Intermediary) integrates and validates services from multiple SaaS
CSPs (secondary CSPs).
– For the CSP(Intermediary), in order to guarantee secure and malware free
SaaS software for CSC, it is necessary to validate SaaS from secondary
CSP1(SaaS), CSP2(SaaS) and CSP3(SaaS). In case of negative SaaS validation the
CSP offer of this SaaS is not presented to CSC.
– In case of connectivity problem between CSP(Intermediary) and CSP1(SaaS),
the service is automate established between CSP(Intermediary) and
CSP3(SaaS).
Roles CSC, CSP, CSP(SaaS)

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