Cryptanalysis of a Hierarchical Identity-based Encryption Scheme
Hierarchical Identity-Based Encryption (HIBE) is a generalization of identity-based encryption that mirrors an organizational hierarchy, and allows the root Private Key Generator (PKG) to distribute the workload of key generations to lower-level PKGs. In Indocrypt'08, Ren and Gu proposed a new HIBE scheme, and claimed that their scheme is fully chosen-ciphertext secure in the standard model. However, by giving a concrete attack, we show that Ren-Gu's HIBE is even not chosen-plaintext secure.
hierarchial identity-based encryption, chosen-ciphertext attack, chosen-plaintext attack, information security
Information Security and Trust
IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
Institute of Electronics, Information and Communication Engineers
WENG, Jian; CHEN, Min-Rong; CHEN, Kefei; and DENG, Robert H..
Cryptanalysis of a Hierarchical Identity-based Encryption Scheme. (2010). IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences. E93-A, (4), 854-856. Research Collection School Of Information Systems.
Available at: http://ink.library.smu.edu.sg/sis_research/1305
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