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

Authors

Leyou Zhang, Xidian University, University of WollongongFollow
Yi Mu, University of WollongongFollow
Qing Wu, Xi'an University of Post and Telecommunications

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.