Publication

Trustful Cumulus Clouds

Rachid Guerraoui
2010
Reports

Abstract

Cloud computing offers an appealing business model and it is tempting for companies to delegate their IT services to the cloud. Yet, a company might ﬁnd it risky to do so for sensible services and to depend entirely on a single provider, which can be vulnerable and constitute a clearly identiﬁed target for attackers. We explore in this paper a replication approach where copies of the same IT service are placed on several (cumulus) clouds that are not only independent but actually unaware of each other. Replica consistency is ensured using CBFT, a new BFT protocol designed for wide area networks. CBFT uses a primary to handle contention among multiple client requests but shares the load of multi- casting and encrypting them among the clients. We evaluate CBFT on an Emulab cluster with a wide area topology and convey its scalability with respect to state of the art BFT protocols.

Official source

https://infoscience.epfl.ch/entities/publication/923cf7c6-d2c0-429e-adeb-d148679b7cd3

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Rachid Guerraoui
2010
Reports

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/923cf7c6-d2c0-429e-adeb-d148679b7cd3

About this result

Related concepts (32)

Metropolitan area network

A metropolitan area network (MAN) is a computer network that interconnects users with computer resources in a geographic region of the size of a metropolitan area. The term MAN is applied to the interconnection of local area networks (LANs) in a city into a single larger network which may then also offer efficient connection to a wide area network. The term is also used to describe the interconnection of several LANs in a metropolitan area through the use of point-to-point connections between them.

Local area network

A local area network (LAN) is a computer network that interconnects computers within a limited area such as a residence, school, laboratory, university campus or office building. By contrast, a wide area network (WAN) not only covers a larger geographic distance, but also generally involves leased telecommunication circuits. Ethernet and Wi-Fi are the two most common technologies in use for local area networks. Historical network technologies include ARCNET, Token Ring and AppleTalk.

Cloud

In meteorology, a cloud is an aerosol consisting of a visible mass of miniature liquid droplets, frozen crystals, or other particles suspended in the atmosphere of a planetary body or similar space. Water or various other chemicals may compose the droplets and crystals. On Earth, clouds are formed as a result of saturation of the air when it is cooled to its dew point, or when it gains sufficient moisture (usually in the form of water vapor) from an adjacent source to raise the dew point to the ambient temperature.

Related publications (7)

Trustful Cumulus Clouds

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