Title

Compact anonymous hierarchical identity-based encryption with constant size private keys

RIS ID

107192

Publication Details

Zhang, L., Mu, Y. & Wu, Q. (2016). Compact anonymous hierarchical identity-based encryption with constant size private keys. Computer Journal, 59 (4), 452-461.

Abstract

We present a new construction of anonymous hierarchical identity-based encryption (HIBE) over prime order groups. The distinct feature of our proposed scheme is that both private key and ciphertext have a constant size, which has never been achieved in all other existing anonymous HIBE schemes. Moreover, we utilized a double exponent technique to generate the ciphertext in order to provide anonymity. This simple and efficient method allows us to construct a more compact anonymous HIBE in prime order groups. Under the decisional bilinear n+1 -Diffie-Hellman exponent assumption and linear assumption, we show that the proposed scheme is secure and anonymous against chosen plaintext attacks in the standard model.

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Link to publisher version (DOI)

http://dx.doi.org/10.1093/comjnl/bxv059