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Paper 2008/327

Blind HIBE and its Applications to Identity-Based Blind Signature and Blind Decryption

Le Trieu Phong and Wakaha Ogata

Abstract

We explicitly describe and analyse \textit{blind} hierachical identity-based encryption (\textit{blind} HIBE) schemes, which are natural generalizations of blind IBE schemes \cite{gh07}. We then uses the blind HIBE schemes to construct: (1) An identity-based blind signature scheme secure in the standard model, under the computational Diffie-Hellman (CDH) assumption, and with much shorter signature size and lesser communication cost, compared to existing proposals. (2) A new mechanism supporting a user to buy digital information over the Internet without revealing what he/she has bought, while protecting the providers from cheating users.

Note: Update the publication info. The title in the IEICE journal is "New Identity-Based Blind Signature and Blind Decryption Scheme in the Standard Model"

Metadata
Available format(s)
PDF
Category
Cryptographic protocols
Publication info
Published elsewhere. IEICE Trans. Fundamentals, Vol.E92-A, No.8, August 2009
Keywords
blind HIBEblind signatureblind decryption
Contact author(s)
letrieu letrieuphong @ gmail com
History
2009-08-12: revised
2008-08-03: received
See all versions
Short URL
https://ia.cr/2008/327
License
Creative Commons Attribution
CC BY
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