IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences
Online ISSN : 1745-1337
Print ISSN : 0916-8508
Regular Section
Cryptanalysis of a Hierarchical Identity-Based Encryption Scheme
Jian WENGMin-Rong CHENKefei CHENRobert H. DENG
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2010 Volume E93.A Issue 4 Pages 854-856

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Abstract

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.

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© 2010 The Institute of Electronics, Information and Communication Engineers
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