Publication Type

Conference Proceeding Article

Version

publishedVersion

Publication Date

9-2015

Abstract

Attribute Based Broadcast Encryption (ABBE) is a combination of Attribute Based Encryption (ABE) and Broadcast Encryption (BE). It allows a broadcaster (or encrypter) to broadcast an encrypted message that can only be decrypted by the receivers who are within a predefined user set and satisfy the access policy specified by the broadcaster. Compared with normal ABE, ABBE allows direct revocation, which is important in many real-time broadcasting applications such as Pay TV. In this paper, we propose two novel ABBE schemes that have distinguishing features: the first scheme is key-policy based and has short ciphertext and constant size decryption key; and the second one is ciphertext-policy based and has constant size ciphertext and short decryption key. Both of our schemes allow access policies to be expressed using AND-gate with positive, negative, and wildcard symbols, and are proven secure under the Decision n-BDHE assumption without random oracles.

Keywords

ANDgate, Attribute based encryption, Broadcast encryption, Wildcard

Discipline

Information Security

Research Areas

Information Systems and Management

Publication

Proceedings of the 20th European Symposium on Research in Computer Security, Vienna, Austria, 2015 September 21-25

Volume

9327

First Page

252

Last Page

269

ISBN

9783319241760

Identifier

10.1007/978-3-319-24177-7_13

Publisher

Springer Verlag

City or Country

Vienna, Austria

Additional URL

http://doi.org/10.1007/978-3-319-24177-7_13

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