首页|Fault-tolerant identity-based encryption from SM9

Fault-tolerant identity-based encryption from SM9

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This paper initiates the formal study of attribute-based encryption within the framework of SM9,the Chinese National Cryptography Standard for Identity-Based Cryptography,by presenting two new fault-tolerant identity-based encryption(FIBE)schemes.Our first scheme uses the same private-key/ciphertext structure as the original SM9 algorithm and operates in a small attribute universe.As a result,it can be effectively and smoothly integrated into the information systems using SM9.In the random oracle model,we prove that our scheme is ciphertext-indistinguishable against fuzzy selective-identity and chosen-plaintext attacks under the(k+3)-DBDHI assumption.Our second design is a large universe FIBE scheme based on SM9 that is ciphertext-indistinguishable against chosen-plaintext attacks in the random oracle model under the(f,g)-GDDHE assumption.Finally,we compare the communication and computing costs of our schemes to those of other classical ones.The comparison shows that our schemes have comparable performance as others.We believe that our findings will accelerate the applications of SM9 in modern information systems such as cloud computing and blockchain.

attribute-based encryptionidentity-based encryptionfault-tolerantSM9

Xiaohong LIU、Xinyi HUANG、Zhaohui CHENG、Wei WU

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Fujian Provincial Key Laboratory of Network Security and Cryptology,College of Computer and Cyber Security,Fujian Normal University,Fuzhou 350117,China

Artificial Intelligence Thrust,Information Hub,The Hong Kong University of Science and Technology(Guangzhou),Guangzhou 511455,China

Olym Information Security Technology Ltd.,Shenzhen 518052,China

Center for Applied Mathematics of Fujian Province,School of Mathematics and Statistics,Fujian Normal University,Fuzhou 350117,China

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National Natural Science Foundation of ChinaNational Natural Science Foundation of China

6203200562372108

2024

10.1007/s11432-022-3706-7

中国科学:信息科学(英文版)
中国科学院

中国科学:信息科学(英文版)

CSTPCDEI
影响因子：0.715
ISSN：1674-733X
年,卷(期)：2024.67(2)
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