On the Security of a Conditional Proxy Re-Encryption

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概要

• 論文の詳細を見る

• To enable fine-grained delegations for proxy re-encryption systems, in AsiaCCS09, Weng et al.s introduced the concept of conditional proxy re-encryption (C-PRE), in which the proxy can convert a ciphertext only if a specified condition is satisfied. Weng et al. also proposed a C-PRE scheme, and claimed that their scheme is secure against chosen-ciphertext attack (CCA). In this paper, we show that their scheme is not CCA-secure under their defined security model.

• （社）電子情報通信学会の論文
• 2009-10-01

著者

• Chen Min‐rong

  Shenzhen Univ. Shenzhen Chn

• Chen Min-rong

  College Of Information Engineering Shenzhen University

• Zhang Xi

  College Of Computer And Software Shenzhen University

関連論文

• On the Security of a Conditional Proxy Re-Encryption
• Cryptanalysis of a Hierarchical Identity-Based Encryption Scheme

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