A Ciphertext-Policy Attribute-Based Proxy Re-encryption with Chosen-Ciphertext Security

Cipher text-Policy Attribute-Based Proxy Re-Encryption (CP-ABPRE) extends the traditional Proxy Re-Encryption (PRE) by allowing a semi-trusted proxy to transform a cipher text under an access policy to the one with the same plaintext under another access policy (i.e. attribute-based re-encryption)....

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Bibliographic Details
Published in2013 5th International Conference on Intelligent Networking and Collaborative Systems pp. 552 - 559
Main Authors Kaitai Liang, Liming Fang, Susilo, Willy, Wong, Duncan S.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.09.2013
Subjects
Chosen-Ciphertext Security
Ciphertext-Policy Attribute-Based Proxy Re-Encryption
Encryption
Games
Hospitals
Proxy Re-Encryption
Resistance
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DOI10.1109/INCoS.2013.103

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Summary:Cipher text-Policy Attribute-Based Proxy Re-Encryption (CP-ABPRE) extends the traditional Proxy Re-Encryption (PRE) by allowing a semi-trusted proxy to transform a cipher text under an access policy to the one with the same plaintext under another access policy (i.e. attribute-based re-encryption). The proxy, however, learns nothing about the underlying plaintext. CP-ABPRE has many real world applications, such as fine-grained access control in cloud storage systems and medical records sharing among different hospitals. Previous CP-ABPRE schemes leave how to be secure against Chosen-Cipher text Attacks (CCA) as an open problem. This paper, for the first time, proposes a new CP-ABPRE to tackle the problem. The new scheme supports attribute-based re-encryption with any monotonic access structures. Despite our scheme is constructed in the random oracle model, it can be proved CCA secure under the decisional q-parallel bilinear Diffie-Hellman exponent assumption.
DOI:10.1109/INCoS.2013.103