Practical Hierarchical Identity Based Encryption Scheme without Random Oracles

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概要

• 論文の詳細を見る

• Recently, Au et al. proposed a practical hierarchical identity-based encryption (HIBE) scheme and a hierarchical identity-based signature (HIBS) scheme. In this paper, we point out that there exists security weakness both for their HIBE and HIBS scheme. Furthermore, based on q-ABDHE, we present a new HIBE scheme which is proved secure in the standard model and it is also efficient. Compared with all previous HIBE schemes, ciphertext size as well as decryption cost are independent of the hierarchy depth. Ciphertexts in our HIBE scheme are always just four group elements and decryption requires only two bilinear map computations.

• （社）電子情報通信学会の論文
• 2009-06-01

著者

• Fan Xun

  Shanghai Jiao Tong Univ. Shanghai Chn

• Fan Xun

  Shanghai Jiao Tong University

• Huang Shangteng

  Shanghai Jiao Tong University

• HU Xiaoming

  Shanghai Second Polytechnic University

• Fan Xun

  Shanghai Jiao Tong Univ. Chn

関連論文

• Practical Hierarchical Identity Based Encryption Scheme without Random Oracles
• A New Fair Queueing Algorithm with Dynamic Service Probability Adjustment(Communication Theory and Signals)

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