Chunpeng Ge1, *, Jinyue Xia2, Liming Fang1
CMC-Computers, Materials & Continua, Vol.63, No.2, pp. 633-647, 2020, DOI:10.32604/cmc.2020.06217
Abstract An identity-based proxy re-encryption scheme (IB-PRE) allows a semi-trusted
proxy to convert an encryption under one identity to another without revealing the
underlying message. Due to the fact that the proxy was semi-trusted, it should place as
little trust as necessary to allow it to perform the translations. In some applications such
as distributed file system, it demands the adversary cannot identify the sender and
recipient’s identities. However, none of the exiting IB-PRE schemes satisfy this
requirement. In this work, we first define the security model of key-private IB-PRE.
Finally, we propose the first key-private IB-PRE scheme. Our scheme is… More >
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