No abstract

<p>Use of the same application by multiple users through internet as a service is supported by cloud computing system. Both the user and attacker stay in the same machine as both of them are users of the same application creating an in-secure environment. Service must ensure secrecy both at the application and data layer level. Data isolation and Application isolation are two basic aspects that must be ensured to cater for security as desired by the clients that accesses the service. In this paper a more secured mechanism has been presented that help ensuring data isolation and security when Multi-tenancy of the users to the same service has been implemented.</p>

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Information dissemination is taking place these days heavily using web sites which are hosted on the internet. The effectiveness and effi-ciency of the design of the WEB site will have great effect on the way the content hosted on the WEB can be accessed. Quality of a web site, places a vital role in making available the required information to the end user with ease satisfying the users content requirements. A framework has been proposed comprising 42 quality metrics using which the quality of a web site can be measured. Howevercompu-tations procedures have not been stated in realistic terms.In this paper, computational procedures for measuring “usability” of a WEB site can be measured which can be included into overall computation of the quality of a web site.