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Anonymous Identity-Based Encryption with Identity Recovery

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Information Security and Privacy (ACISP 2018)

Part of the book series: Lecture Notes in Computer Science ((LNSC,volume 10946))

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Abstract

Anonymous Identity-Based Encryption can protect privacy of the receiver. However, there are some situations that we need to recover the identity of the receiver, for example a dispute occurs or the privacy mechanism is abused. In this paper, we propose a new concept, referred to as Anonymous Identity-Based Encryption with Identity Recovery (AIBEIR), which is an anonymous IBE with identity recovery property. There is a party called the Identity Recovery Manager (IRM) who has a secret key to recover the identity from the ciphertext in our scheme. We construct it with an anonymous IBE and a special IBE which we call it testable IBE. In order to ensure the semantic security in the case where the identity recovery manager is an adversary, we define a stronger semantic security model in which the adversary is given the secret key of the identity recovery manager. To our knowledge, we propose the first AIBEIR scheme and prove the security in our defined model.

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Notes

  1. 1.

    In fact, Boyen gave an ID-based signcryption with a formalization of sender and recipient anonymity.

  2. 2.

    Here the adversary can not be the identity recovery manager and has PPT power.

  3. 3.

    Here 0 has the same length with \(m_0\) and \(m_1\).

  4. 4.

    Here 0 has the same length with \(c_0\).

  5. 5.

    Here 0 has the same length with \(id_{\gamma }\).

  6. 6.

    This means we can obtain a T-IBE ciphertext under \(id_2\) by decrypting the “double-encrypt” ciphertext under \(id_1\) using \(SK_{A,id_2}\).

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Acknowledgements

We would like to thank the anonymous reviewers of ACISP 2018 for their advice. Xuecheng Ma and Dongdai Lin are supported by the National Natural Science Foundation of China under Grant No. 61379139.

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Authors and Affiliations

  1. State Key Laboratory of Information Security, Institute of Information Engineering, Chinese Academy of Sciences, Beijing, 100093, China

    Xuecheng Ma, Xin Wang & Dongdai Lin

  2. School of Cyber Security, University of Chinese Academy of Sciences, Beijing, 100049, China

    Xuecheng Ma & Xin Wang

Authors
  1. Xuecheng Ma
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  2. Xin Wang
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  3. Dongdai Lin
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Correspondence to Dongdai Lin .

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Editors and Affiliations

  1. University of Wollongong, Wollongong, NSW, Australia

    Willy Susilo

  2. University of Wollongong, Wollongong, NSW, Australia

    Guomin Yang

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Ma, X., Wang, X., Lin, D. (2018). Anonymous Identity-Based Encryption with Identity Recovery. In: Susilo, W., Yang, G. (eds) Information Security and Privacy. ACISP 2018. Lecture Notes in Computer Science(), vol 10946. Springer, Cham. https://doi.org/10.1007/978-3-319-93638-3_21

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  • DOI: https://doi.org/10.1007/978-3-319-93638-3_21

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