Page 852 - Cloud computing: From paradigm to operation

5 Intercloud and interoperability

1 Scope
This Recommendation describes inter-cloud trust management aspects including:
– isolation and security management mechanism;
– trust management model;

– reputation-based trust management;
– cloud service evaluation framework;
– relationship with cloud computing reference architecture;
– requirements for inter-cloud trust management and relative use cases.

2 References

The following ITU-T Recommendations and other references contain provisions which, through reference in
this text, constitute provisions of this Recommendation. At the time of publication, the editions indicated
were valid. All Recommendations and other references are subject to revision; users of this Recommendation
are therefore encouraged to investigate the possibility of applying the most recent edition of the
Recommendations and other references listed below. A list of the currently valid ITU-T Recommendations is
regularly published. The reference to a document within this Recommendation does not give it, as a stand-
alone document, the status of a Recommendation.
[ITU-T X.1601] Recommendation ITU-T X.1601 (2015), Security framework for cloud computing.
[ITU-T Y.3501] Recommendation ITU-T Y.3501 (2016), Cloud computing – Framework and high-level
requirements.
[ITU-T Y.3502] Recommendation ITU-T Y.3502 (2014) | ISO/IEC 17789:2014, Cloud computing –
Reference architecture.

[ITU-T Y.3511] Recommendation ITU-T Y.3511 (2014), Framework of inter-cloud computing.
[ITU-T Y.3514] Recommendation ITU-T Y.3514 (2017), Cloud computing – Trusted inter-cloud
computing framework and requirements.
[ITU-T Y.3516] Recommendation ITU-T Y.3516 (2017), Cloud computing – Functional architecture of
inter-cloud computing.

3 Definitions

3.1 Terms defined elsewhere
This Recommendation uses the following terms defined elsewhere:

3.1.1 cloud computing [b-ITU-T Y.3500]: Paradigm for enabling network access to a scalable and elastic
pool of shareable physical or virtual resources with self-service provisioning and administration on-demand.

NOTE – Examples of resources include servers, operating systems, networks, software, applications, and storage
equipment.
3.1.2 cloud service [b-ITU-T Y.3500]: One or more capabilities offered via cloud computing invoked using
a defined interface.
3.1.3 cloud service agreement [b-ISO/IEC 19086-1]: Documented agreement between the cloud service
provider and cloud service customer that governs the covered service(s).
NOTE – A cloud service agreement can consist of one or more parts recorded in one or more documents.

3.1.4 cloud service customer [b-ITU-T Y.3500]: Party which is in a business relationship for the purpose of
using cloud services.
NOTE – A business relationship does not necessarily imply financial agreements.

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