Ciphertext-Policy Attribute-Based Broadcast Encryption with Small Keys

Autor:	Benjamin Wesolowski, Pascal Junod
Rok vydání:	2016
Předmět:	business.industry Computer science computer.software_genre Encryption Multiple encryption Probabilistic encryption 40-bit encryption Keyfile Attribute-based encryption On-the-fly encryption business Broadcast encryption computer Computer network
Zdroj:	Information Security and Cryptology-ICISC 2015 ISBN: 9783319308395 ICISC
DOI:	10.1007/978-3-319-30840-1_4
Popis:	Broadcasting is a very efficient way to securely transmit information to a large set of geographically scattered receivers, and in practice, it is often the case that these receivers can be grouped in sets sharing common characteristics (or attributes). We describe in this paper an efficient ciphertext-policy attribute-based broadcast encryption scheme (CP-ABBE) supporting negative attributes and able to handle access policies in conjunctive normal form (CNF). Essentially, our scheme is a combination of the Boneh-Gentry-Waters broadcast encryption and of the Lewko-Sahai-Waters revocation schemes; the former is used to express attribute-based access policies while the latter is dedicated to the revocation of individual receivers. Our scheme is the first one that involves a public key and private keys having a size that is independent of the number of receivers registered in the system. Its selective security is proven with respect to the Generalized Diffie-Hellman Exponent (GDHE) problem on bilinear groups.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5616c9de4a7a37180467a7684e4635ed https://doi.org/10.1007/978-3-319-30840-1_4 Zobrazit plný text záznamu