The Cloud Service Providers Should Address The Still Open...

The Cloud Service Providers Should Address The Still Open...

C RYPTOGRAPHY T ECHNIQUES

The cloud service providers should address the still open cloud security problems in order to encourage users to use this technology. The most important concerns are confidentiality, integrity and availability. In a complex and non–transparent system like cloud computing, it is difficult for a user to even determine what kind of security measures are implemented in the cloud. This section presents Cryptography, as one of the security measure that can be implemented.

Cryptography techniques are defined as methods that protect the data by changing the format of the data, such that it can not be understood by unauthorized users. The objectives of cryptography are [9]:

1) Confidentiality

This is the service that makes sure that the data is accessed by the owner of the data and not allow unauthorized to access the data.

1) Resource Location

As the data is stored at an unknown location, the client is unaware of the problems when there is a dispute and is not in the control of the cloud service provider. The data stored by the cloud service providers is not only under the policies of the service provider but are also affected by the countries' legislation policies where the data is stored. This makes the service providers hand over sensitive information in accordance to the countries' law and its law enforcement requests. If someone subpoena the data stored then the service provider has to hand over that data without any consent from the owner of the data.

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