Abstract
Hierarchical identity-based encryption (HIBE) is a generalization of identity-based encryption (IBE) which allows for a hierarchy of identities where any parent identities can derive secret keys for child identities. In this paper, we propose a new HIBE scheme with constant size ciphertexts and short parameters in prime order groups using symmetric pairing. We use a new technique called “hybrid identity vector” to make the key derivation feasible. Our scheme is proven fully secure under the DBDH and D-Linear assumptions by using dual system encryption. Based on our HIBE scheme, we propose a new WIBE (IBE with wildcards) scheme with constant size ciphertexts.
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Luo, S., Chen, Y., Hu, J., Chen, Z. (2011). New Fully Secure Hierarchical Identity-Based Encryption with Constant Size Ciphertexts. In: Bao, F., Weng, J. (eds) Information Security Practice and Experience. ISPEC 2011. Lecture Notes in Computer Science, vol 6672. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-21031-0_5
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DOI: https://doi.org/10.1007/978-3-642-21031-0_5
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