Cryptanalysis of a Hierarchical Identity-based Encryption Scheme

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...

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Bibliographic Details
Main Authors: WENG, Jian, CHEN, Min-Rong, CHEN, Kefei, DENG, Robert H.
Format: text
Language:English
Published: Institutional Knowledge at Singapore Management University 2010
Subjects:
hierarchial identity-based encryption
chosen-ciphertext attack
chosen-plaintext attack
information security
Information Security
Online Access:https://ink.library.smu.edu.sg/sis_research/1305
https://doi.org/10.1587/transfun.E93.A.854
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Institution: Singapore Management University
Language: English
Description
Summary: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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