Adaptively Secure Broadcast Encryption with Dealership
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- 关键词：Broadcast encryption with dealership ; Chosen plaintext attack ; Maximum number of accountability ; Privacy ; Adaptive security
- 刊名：Lecture Notes in Computer Science
- 出版年：2017
- 出版时间：2017
- 年：2017
- 卷：10157
- 期：1
- 页码：161-177
- 丛书名：Information Security and Cryptology ?ICISC 2016
- ISBN：978-3-319-53177-9
- 卷排序：10157
文摘
In this paper, we put forward first adaptively chosen plaintext attack (CPA) secure broadcast encryption with dealership (BED) scheme in standard model. We achieve adaptive security in the standard model under reasonable assumption in contrast to semi-static security of Gritti et al. and selective security in random oracle model by Acharya et al. Our scheme also achieves privacy in form of hiding the group of subscribed users from broadcaster and supports maximum number of accountability under reasonable assumptions. Unlike the scheme of Gritti et al., our scheme does not need to rely on users’ response to detect the dishonest dealer like recently proposed scheme of Acharya et al.