Volume -I , Issue -X, April 2015

IDENTITY-BASED CONDITIONAL PROXY RE-ENCRYPTION WITHOUT RANDOM ORACLES FOR SECURING BROKERLESS PUBLISH/SUBSCRIBE SYSTEMS

Author(s) :

Shagoufta Taskeen , Vidyarani H. J.

Abstract

Identity-based encryption (IBE) is an important primitive of identity-based cryptography. As such it is a type of public-key encryption in which the public key of a user is some unique information about the identity of the user.In an identity-based proxy re-encryption (IB-PRE) scheme, a semi-trusted proxy can convert a ciphertext under Alice’s identity into a ciphertext for Bob. The proxy does not know the secret key of Alice or Bob, and also does not know the plaintext during the conversion. However, some scenarios require handle a fine-grained delegation. In this paper, by using the identity-based encryption (IBE) technique of Boneh-Boyen, we propose a new identity-based conditional proxy re-encryption (IBCPRE) scheme, which enables Alice to implement fine-grained delegation of decryption rights, and thus is more useful in many applications. Our scheme has significant advantages in both computational and communicational than Shao et al.’s IBCPRE scheme.

Keywords

peer-to-peer, broker-less, security,identity-based encryption.Proxy re-encryption, Identity-based conditional proxy re-encryption, Bilinear maps.

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How to Cite this Paper? [APA Style]
Shagoufta Taskeen , Vidyarani H. J. , (2015), IDENTITY-BASED CONDITIONAL PROXY RE-ENCRYPTION WITHOUT RANDOM ORACLES FOR SECURING BROKERLESS PUBLISH/SUBSCRIBE SYSTEMS, Industrial Science Journal, http://industrialscience.org/Article.aspx?aid=68&vid=10, (April, 2015)
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