  There are a lot of on going efforts in the research community as well as
industry around providing privacy-preserving and secure storage for personal
data. Although, over time it has adopted many tag lines such as Personal
Information Hub [12], personal container [8], DataBox [4], Personal Data Store
(PDS) [3] and many others, these are essentially reincarnations of a simple
idea: provide a secure way and place for users to store their information and
allow them to provision who has access to that information. In this paper, we
would like to discuss a way to facilitate access control mechanism (AC) in the
various "personal cloud" proposals.
