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Addressing Leakage of Re-encryption Key in Proxy Re-encryption Using Trusted Computing

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Trusted Systems (INTRUST 2010)

Part of the book series: Lecture Notes in Computer Science ((LNSC,volume 6802))

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Abstract

Proxy re-encryption is a cryptographic primitive enabling a proxy holding a re-encryption key to convert a ciphertext originally intended for Alice (delegator) into an encryption of the same message for Bob (delegatee). Proxy re-encryption is a useful tool, having many applications. However, we observe that the issue of re-encryption key leakage, where the delegatee acquires the re-encryption key from the proxy, has been neglected by virtually all of the existing work. Possession of the re-encryption key allows the delegatee to decrypt the delegator’s ciphertexts by himself, without necessarily turning to the proxy for conversion, which may contradict the delegator’s interest. In this work, we present a method to address this issue using trusted computing technology. Our proposal represents yet another application of trusted computing.

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Author information

Authors and Affiliations

  1. Institute for Infocomm Research, Singapore

    Yanjiang Yang & Feng Bao

  2. Key Lab. of High Confidence Software Technologies, Peking University, China

    Liang Gu

Authors
  1. Yanjiang Yang
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  2. Liang Gu
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  3. Feng Bao
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Editor information

Editors and Affiliations

  1. Hewlett-Packard Labs, Long Down Avenue, Stoke Gifford, BS34 8QZ, Bristol, UK

    Liqun Chen

  2. Google Inc. and Department of Computer Science, Columbia University, USA

    Moti Yung

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Yang, Y., Gu, L., Bao, F. (2011). Addressing Leakage of Re-encryption Key in Proxy Re-encryption Using Trusted Computing. In: Chen, L., Yung, M. (eds) Trusted Systems. INTRUST 2010. Lecture Notes in Computer Science, vol 6802. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-25283-9_13

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  • DOI: https://doi.org/10.1007/978-3-642-25283-9_13

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-25282-2

  • Online ISBN: 978-3-642-25283-9

  • eBook Packages: Computer ScienceComputer Science (R0)

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