Journal article
Server‐aided revocable attribute‐based encryption for cloud computing services
Concurrency and Computation: Practice and Experience, Vol.32(14), e5680
2020
Abstract
Attribute‐based encryption (ABE) has been regarded as a promising solution in cloud computing services to enable scalable access control without compromising the security. Despite of the advantages, efficient user revocation has been a challenge in ABE. One suggestion for user revocation is using the binary tree in the key generation phase of an ABE scheme, which enables a trusted key generation center to periodically distribute the key update information to all nonrevoked users over a public channel. This revocation approach reduces the size of key updates from linear to logarithmic in the number of users. But it requires each user to keep a private key of the logarithmic size, and asks each nonrevoked user to periodically update his/her decryption key for each new time period. To further optimize user revocation in ABE, a server‐aided revocable ABE (SR‐ABE) scheme has been proposed, in which almost all workloads of users incurred by the user revocation are outsourced to an untrusted server, and each user only needs to store a private key of the constant size. In addition, SR‐ABE does not require any secure channel for the key transmission, and a user only needs to perform a small amount of calculations to decrypt a ciphertext. In this paper, we revisit the notion of SR‐ABE, and present a generic construction of SR‐ABE, which can transform a revocable ABE (RABE) scheme to an SR‐ABE scheme. In addition, we give an instantiation of SR‐ABE by applying the generic construction on a concrete RABE scheme, and implement an instantiation of SR‐ABE and an RABE scheme to evaluate the performance of SR‐ABE.
Details
- Title
- Server‐aided revocable attribute‐based encryption for cloud computing services
- Authors/Creators
- H. Cui (Author/Creator) - Murdoch UniversityT. Hon Yuen (Author/Creator)R.H. Deng (Author/Creator) - Singapore Management UniversityG. Wang (Author/Creator) - Huawei Technologies (France)
- Publication Details
- Concurrency and Computation: Practice and Experience, Vol.32(14), e5680
- Publisher
- John Wiley & Sons Ltd
- Identifiers
- 991005543508007891
- Copyright
- © 2020 John Wiley & Sons, Ltd.
- Murdoch Affiliation
- Information Technology, Mathematics and Statistics
- Language
- English
- Resource Type
- Journal article
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- 4.187 Security Systems
- 4.187.160 Cryptographic Protocols
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