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Conditional Proxy Broadcast Re-Encryption

Conditional Proxy Broadcast Re-Encryption,10.1007/978-3-642-02620-1_23,Cheng-kang Chu,Jian Weng,Sherman S. M. Chow,Jianying Zhou,Robert Huijie DENG

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Conditional Proxy Broadcast Re-Encryption   (Citations: 10)
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A proxy re-encryption (PRE) scheme supports the delegation of decryption rights via a proxy, who makes the ciphertexts decryptable by the delegatee. PRE is useful in various applications such as encrypted email forwarding. In this paper, we introduce a more generalized notion of conditional proxy broadcast re-encryption (CPBRE). A CPBRE scheme allows Alice to generate a re-encryption key for some condition specified during the encryption, such that the re-encryption power of the proxy is restricted to that condition only. This enables a more fine-grained delegation of decryption right. Moreover, Alice can delegate decryption rights to a set of users at a time. That is, Alice’s ciphertexts can be re-broadcasted. This saves a lot of computation and communication cost. We propose a basic CPBRE scheme secure against chosen-plaintext attacks, and its extension which is secure against replayable chosen-ciphertext attacks (RCCA). Both schemes are unidirectional and proved secure in the standard model. Finally, we show that it is easy to get a unidirectional RCCA-secure identity-based proxy re-encryption from our RCCA-secure CPBRE construction.
Conference: Australasian Conference on Information Security and Privacy - ACISP , pp. 327-342, 2009
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    • ...Most recently, Chu et al. [14] and Fang et al. [15] proposed several replayable chosen-ciphertext (RCCA) secure 2 CPRE schemes...

    Jun Shao, et al. Identity-Based Conditional Proxy Re-Encryption

    • ...Another interesting problem, which possibly requires a different set of techniques, is to construct other schemes in proxy re-cryptography, such as conditional PRE schemes [21] and proxy re-signatures [22,23], without pairings...

    Sherman S. M. Chow, et al. Efficient Unidirectional Proxy Re-Encryption

    • ...Chu et al. [7] and Fang et al. [10] proposed several replayable chosenciphertext (RCCA) secure TB-PRE schemes, but none of them hold the invisible proxy property...

    Xiaoqi Jia, et al. CCA-Secure Type-based Proxy Re-encryption with Invisible Proxy

    • ...Besides the above works, Chu et.al introduced their work on conditional proxy broadcast reencryption [19] . Fang et al. did some interesting research on CCA-secure anonymous CPRE [20] , which answering an open question about condition anonymity [10] ...

    Jing Zhao, et al. Attribute-Based Conditional Proxy Re-Encryption with Chosen-Ciphertext...

    • ...Since then, several IBPRE schemes have been proposed, but none of them except [5], [13] can achieve master secret secure: the corrupted proxy and delegatee can not derive the delegator’s private key...
    • ...IBPRE schemes in [5] rely on conditional proxy broadcast re-encryption, they are also inefficient and can only achieve secure against replayable chosen ciphertext attacks (RCCA)...
    • ...Recently, two ideas about constructing master secret secure IBPRE schemes have been proposed [5], [13], but they are generic construction and thus inefficient...

    Xu An Wang, et al. A New Identity Based Proxy Re-Encryption Scheme

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