Dot net projet Co-operative sharing among various Communites

Unfortunately, sharing data in a multi-owner manner while preserving data and
identity privacy from an untrusted user is still a challenging issue, due to the
frequent change of the membership. In this paper, we propose a secure multiowner
data sharing scheme by using simple key sharing technique. any user can
anonymously share data with others. Meanwhile, the storage overhead and
encryption computation cost can be reduced by using simple key sharing
scheme.
In this every group hold a key to view the files whereas the file can be viewed
by different group peoples only if they have access permission. In this way we
can avoid user group revocation and overhead of key generation for each and
every file where it will occupy more valuable spacewww.fu-vision .com
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