DOTNET PROJECT
Revocable
Identity-Based Broadcast Proxy Re-encryption for Data Sharing in Clouds
Abstract:
Cloud computing has become prevalent due to
its nature of massive storage and vast computing capabilities. Ensuring a
secure data sharing is critical to cloud applications. Recently, a number of
identity-based broadcast proxy re-encryption (IB-BPRE) schemes have been
proposed to resolve the problem. However, the IB-BPRE requires a cloud user
(Alice) who wants to share data with a bunch of other users (e.g. colleagues)
to participate the group shared key renewal process because Alice's private key
is a prerequisite for shared key generation. This, however, does not leverage
the benefit of cloud computing and causes the inconvenience for cloud users.
Therefore, a novel security notion named revocable identity-based broadcast
proxy re-encryption (RIB-BPRE) is presented to address the issue of key
revocation in this work. In a RIB-BPRE scheme, a proxy can revoke a set of
delegates, designated by the delegator, from the re-encryption key. The
performance evaluation reveals that the proposed scheme is efficient and
practical.
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