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Generic user revocation systems for attribute-based encryption in cloud storage |
Genlang CHEN, Zhiqian XU, Hai JIANG, Kuan-ching LI |
Institute of Ningbo Technology, Zhejiang University, Ningbo 315000, China
Independent Scholar
Department of Computer Science, Arkansas State University, Jonesboro 72467, USA
Department of Computer Science and Information Engineering, Providence University, Taiwan 43301, China |
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Abstract Cloud-based storage is a service model for businesses and individual users that involves paid or free
storage resources. This service model enables on-demand storage capacity and management to users anywhere
via the Internet. Because most cloud storage is provided by third-party service providers, the trust required for
the cloud storage providers and the shared multi-tenant environment present special challenges for data protection
and access control. Attribute-based encryption (ABE) not only protects data secrecy, but also has ciphertexts or
decryption keys associated with fine-grained access policies that are automatically enforced during the decryption
process. This enforcement puts data access under control at each data item level. However, ABE schemes have
practical limitations on dynamic user revocation. In this paper, we propose two generic user revocation systems for
ABE with user privacy protection, user revocation via ciphertext re-encryption (UR-CRE) and user revocation via
cloud storage providers (UR-CSP), which work with any type of ABE scheme to dynamically revoke users.
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Received: 27 June 2018
Published: 13 June 2019
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Generic user revocation systems for attribute-based encryption in cloud storage
Cloud-based storage is a service model for businesses and individual users that involves paid or free
storage resources. This service model enables on-demand storage capacity and management to users anywhere
via the Internet. Because most cloud storage is provided by third-party service providers, the trust required for
the cloud storage providers and the shared multi-tenant environment present special challenges for data protection
and access control. Attribute-based encryption (ABE) not only protects data secrecy, but also has ciphertexts or
decryption keys associated with fine-grained access policies that are automatically enforced during the decryption
process. This enforcement puts data access under control at each data item level. However, ABE schemes have
practical limitations on dynamic user revocation. In this paper, we propose two generic user revocation systems for
ABE with user privacy protection, user revocation via ciphertext re-encryption (UR-CRE) and user revocation via
cloud storage providers (UR-CSP), which work with any type of ABE scheme to dynamically revoke users.
关键词:
Attribute-based encryption,
Generic user revocation,
User privacy,
Cloud storage,
Access control
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