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Revocable Broadcast Encryption with Constant Ciphertext and Private Key Size

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In a revocable broadcast encryption scheme, the group manager can flexibly set revoked users who cannot decrypt the ciphertext. Many applications of the revocable broadcast encryption have been found in the secure cloud data sharing. An adaptively secure revocable broadcast encryption system with constant ciphertext and private key size under standard assumptions is more suitable for use in the cloud environment. Few existing revocable broadcast encryption schemes meet such a requirement. We propose a revocable broadcast encryption scheme with constant size ciphertext and private key by combining the RSA cryptographic accumulator with an efficient identity based encryption system. We prove it to be adaptively secure under standard assumptions using dual system encryption techniques.

Cryptographic accumulatorBroadcast encryptionRevocableDual system encryptionCloud data sharing

JIA Hongyong、CHEN Yue、YANG Kuiwu、GUO Yuanbo、WANG Zhiwei

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Zhengzhou University, Zhengzhou 450001, China

State Key Laboratory of Mathematical Engineering and Advanced Computing, Zhengzhou 450001, China

Nanjing University of Post and Communications, Nanjing 210003,China

This work is supported by the the National Basic Research Program of China(973 Program)National Natural Science Foundation of China

2012CB31590161373006

2019

10.1049/cje.2019.04.003

中国电子杂志(英文版)

中国电子杂志(英文版)

CSTPCDCSCDSCIEI
ISSN：1022-4653
年,卷(期)：2019.28(4)
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