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)
- 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
-
CC BY