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Table 1 System parameters and definitions for service type

From: Privacy preserving model: a new scheme for auditing cloud stakeholders

Notations

Description

Ax

Amount paid for each service for a particular period

fi

Specifies the function (e.g., max or sum).

k

Service type

C sp

Cloud service provider

L

Security limitations

N

The number of cloud users

Δqi = fi(qi)

Correct answer of each query stored in a cluster

Qi = (qi, fi)

Each query for every member of data set

x

The user that access the service

n(ω)

Contracted services

Z = {Z1, Z2, …, Zn}

Arbitrary data set

{Zj | j qi}.

Subset of data-set entry

A dit

Third party auditor

C id

Identity of cloud users