云信任管理综述

Managing Trust

in the Cloud:

State of the Art

and Research Challenges

Talal H. Noor, Taibah University

Quan Z. Sheng, University of Adelaide

Zakaria Maamar, Zayed University

Sherali Zeadally, University of Kentucky

Cloud computing is a highly promising technology, but

deficient trust management is hindering market growth.

A proposed framework for analyzing trust management

systems can help researchers develop innovative

solutions to challenges such as identification, privacy, personalization, integration, security, and scalability.

O ver the past few years, cloud computing has

emerged as a new paradigm for providing

flexible and on-demand infrastructure as a

service (IaaS), platform as a service (PaaS), and software as a service (SaaS). Cloud computing com-bines the best of grid computing1 and service-oriented computing.2 In grid computing, multiple organizations pool their hardware resources to achieve specific goals, such as high performance and reduced costs; in ser-vice-oriented computing, software resources are pro-vided as services. In cloud computing, however, both hardware and software resources are configured as ser-vices using virtualization techniques—for example, the creation of virtual instances of the hardware platform, OS, and network storage—to automate business process execution over distributed systems.

Cloud computing promises several benefits such as expense reduction, resource elasticity, and simplicity.1,3 On the other hand, cloud services’ highly dynamic, dis-tributed, and nontransparent nature makes establishing and managing trust among cloud service providers and consumers a significant challenge. In fact, a recent study showed that inadequate trust management is among the top obstacles to cloud computing adoption.4

Numerous researchers have explored trust man-agement in Web services. For instance, Audun J?sang, Roslan Ismail, and Colin Boyd discussed general ideas of trust, such as trust classes and trust purpose, and

34C O MP U T E R P U B L I S H E D B Y T H E I E E E C O M P U T E R S O C I E T Y0018-9162/16/$33.00?2016I E E E

?

Interests

and capabilities Trust can be managed through (a) policies, (b) recommendations, (c) reputation, or (d) prediction.

weighing the trust feedback based on the transaction cost) or a general metric Trust assessment

Trust results distribution

Trust feedback Trust assessment

function

Trust results Trust feedback

Tr st res lts

Three-layered architecture of our proposed trust management analytical